CN108731649B

CN108731649B - 2000 mapping reference frame unifying method, device and computer readable storage medium

Info

Publication number: CN108731649B
Application number: CN201810215672.2A
Authority: CN
Inventors: 欧海平; 秦亮军; 刘洋; 喻永平; 余锐; 张�荣; 刘业光; 程晓晖; 王天应; 罗峰; 娄俊萍
Original assignee: Guangzhou Urban Planning Survey and Design Institute
Current assignee: Guangzhou Urban Planning Survey and Design Institute
Priority date: 2018-03-15
Filing date: 2018-03-15
Publication date: 2020-11-24
Anticipated expiration: 2038-03-15
Also published as: CN108731649A

Abstract

The invention provides a 2000 mapping reference frame unifying method, a device and a computer readable storage medium, wherein the method comprises the steps of establishing a main network of a CORS reference station of a target city and an expansion network of the CORS reference station with the same precision; and taking a reference station of the provincial CORS system as a starting point, and respectively carrying out adjustment calculation on a CORS reference station main network, a CORS reference station expansion network with the same precision, a first control network, a second control network and a third control network in a starting point transmission mode to obtain CGCS2000 geodetic coordinates, 1980 Western ampere coordinates and 2000 coordinates corresponding to the reference stations of the CORS reference station main network, the CORS reference station expansion network with the same precision, the first control network, the second control network and the third control network. The method uses the CORS system as a reference to uniformly map a reference frame, can realize dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize information sharing of a coordinate system, and is convenient for city management and city construction.

Description

2000 mapping reference frame unifying method, device and computer readable storage medium

Technical Field

The invention relates to the field of urban coordinate conversion calculation, in particular to a 2000 mapping reference frame unifying method and device and a computer readable storage medium.

Background

The surveying and mapping datum refers to a calculation basis of the whole surveying and mapping of a country and the basis of various surveying and mapping systems, and comprises various selected geodetic surveying parameters, a unified calculation starting surface, a calculation starting datum point, a calculation starting azimuth, relevant places, facilities, names and the like, and the surveying and mapping datum adopted at present in China mainly comprises a geodetic datum, an elevation datum, a depth datum and a gravity datum. A gravity basic network, an elevation control network, a national plane control network and a national GPS control network.

At present, most cities in China have a condition of sharing a plurality of coordinate systems in the aspect of surveying and mapping reference for a long time, and different departments and regions use different coordinate systems as administrative management bases, such as Guangzhou 2000 coordinate system in the field of city planning and city construction, 1980 Xian coordinate system in the field of homeland management, regional independent coordinate systems of Huadu, Panyu, Zengcheng, Congregation and the like. The coexistence of multiple sets of coordinate systems not only increases the cost and difficulty of information sharing, 2000-earth coordinate maintenance and service connection, but also brings much inconvenience and even contradiction to city management and city construction, and causes some unnecessary coordination and administrative risks.

Disclosure of Invention

The invention aims to provide a unified method and a unified device for a 2000 mapping reference frame and a computer readable storage medium, wherein the method takes a CORS system as a reference to unify the mapping reference frame, can realize the dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize the information sharing of a coordinate system, and is convenient for city management and city construction.

The embodiment of the invention provides a 2000 mapping reference frame unifying method, which comprises the following steps:

respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an equivalent-precision CORS reference station expansion network of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to the province to which the target city belongs;

taking the reference station of the province CORS system as a starting point, and performing adjustment calculation on the main network of the CORS reference station to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city, which correspond to the reference station of the main network of the CORS reference station;

with the main network of the CORS reference station as a starting point, carrying out adjustment calculation processing on the CORS reference station expansion network with the same precision to obtain CGCS2000 geodetic coordinates, 1980 Western-Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision;

and respectively carrying out adjustment calculation processing on a first control network, a second control network and a third control network of the target city by taking the main network of the CORS reference station as a starting point, and respectively obtaining CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network.

Preferably, the plurality of CORS systems of the target city and the province CORS systems around the target city respectively acquire a first set number of reference stations and a second set number of reference stations, and respectively establish a CORS reference station main network of the target city corresponding to the first set number and a CORS reference station expansion network with the same precision of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to a province to which the target city belongs, and specifically comprises:

acquiring a third set number of reference stations from a plurality of CORS systems of a target city and the reference stations in CORS systems of provinces around the target city, and establishing a new CORS system of the target city;

acquiring i reference stations which do not overlap with the reference stations of the new CORS system of the target city and all the reference stations of the new CORS system of the target city from a plurality of CORS systems of the target city and province CORS systems around the target city, and establishing a main network of CORS reference stations of the target city, wherein the sum of the i reference stations and all the reference stations of the new CORS system of the target city is equal to the first set number;

acquiring k reference stations which are not overlapped with the reference stations of the new CORS system of the target city and all the reference stations of the new CORS system of the target city from a plurality of CORS systems of the target city and province CORS systems around the target city, and establishing an equivalent-precision CORS reference station expansion network of the target city, wherein the sum of the k reference stations and all the reference stations of the new CORS system of the target city is equal to the second set number.

Preferably, the taking the reference station of the province CORS system as a starting point, performing adjustment calculation on the CORS reference station main network to obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station main network, specifically including:

acquiring a first superposed reference station of the provincial CORS system and a main network of the CORS reference station;

taking the first superposition reference station as a starting point, and carrying out baseline calculation on the CORS reference station main network to obtain a baseline calculation result corresponding to the CORS reference station main network;

calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the CORS reference station main network according to the baseline calculation result corresponding to the CORS reference station main network and the coordinates of the first superposition reference station;

and performing Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the CORS reference station main network according to the parameters of the 2000 coordinate system of the target city to obtain 2000 coordinates of the target city corresponding to the reference station of the CORS reference station main network.

Preferably, the base line calculation is performed on the main network of the CORS reference station by using the first coinciding reference station as a starting point to obtain a base line calculation result corresponding to the main network of the CORS reference station, and the method specifically includes:

acquiring N-1 reference stations from the CORS reference station main network, wherein the total number of the reference stations of the CORS reference station main network is N, and the base lengths of the N-1 reference stations are uniform;

taking the first superposition reference station as a starting point, and performing baseline solution on a baseline formed by the N-1 reference stations according to pre-acquired global station data, a precise ephemeris, observation data corresponding to the N-1 reference stations, an antenna file and a preset baseline solution strategy to obtain a full network solution result corresponding to a main network of the CORS reference station;

acquiring an Nth reference station and M adjacent reference stations from the CORS reference station main network, wherein the Nth reference station is a reference station which is left after acquiring N-1 reference stations of the CORS reference station main network, and the M adjacent reference stations are M reference stations adjacent to the Nth reference station in the CORS reference station main network;

taking the first superposition reference station as a starting point, respectively carrying out baseline solution on M single baselines formed by the Nth reference station and the M adjacent reference stations according to the pre-acquired global station data, the precise ephemeris, the observation data corresponding to the N-1 reference stations, an antenna file and a preset baseline solution strategy, and obtaining M single baseline solution results corresponding to the main network of the CORS reference station;

and obtaining a base line resolving result corresponding to the main network of the CORS reference station according to the full network resolving result corresponding to the main network of the CORS reference station and the M single base line resolving results.

Preferably, the 2000 mapping fiducial frame unified method further comprises:

acquiring a synchronous ring closure difference of the main network of the CORS reference station according to an nrms value of a baseline resolving result corresponding to the main network of the CORS reference station;

calculating the closing difference of an asynchronous ring of the main network of the CORS reference station according to the base line formed by the N-1 reference stations and the M single base lines formed by the Nth reference station and the M adjacent reference stations;

respectively performing linear fitting on the baseline composed of the N-1 reference stations, the fixed errors and the proportional errors of the baseline components corresponding to the M single baselines composed of the Nth reference station and the M adjacent reference stations, and calculating the repetition accuracy of the main network of the CORS reference station;

calculating the base line repetition rate of the main network of the CORS reference station according to the base line resolving result corresponding to the main network of the CORS reference station and the repetition precision of the main network of the CORS reference station;

judging whether a baseline resolving result corresponding to the main network of the CORS reference station meets a preset baseline condition or not according to the synchronous ring closing difference, the asynchronous ring closing difference and the baseline repetition rate of the main network of the CORS reference station;

and when the baseline calculation result corresponding to the CORS reference station master network does not meet the preset baseline condition, carrying out baseline calculation on the CORS reference station master network again.

Preferably, the step of taking the main network of the CORS reference station as a starting point and performing adjustment calculation processing on the expansion network of the CORS reference station with the same precision to obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference station of the expansion network of the CORS reference station with the same precision specifically includes:

acquiring a second combined reference station of the main network of the CORS reference station and the expansion network of the CORS reference station with the same precision;

taking the second combined reference station as a starting point, and carrying out baseline calculation on the CORS reference station expansion network with the same precision to obtain a baseline calculation result corresponding to the CORS reference station expansion network with the same precision;

calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the CORS reference station extended network with the same precision according to the baseline calculation result corresponding to the CORS reference station extended network with the same precision and the coordinates of the second combined reference station;

and performing Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the CORS reference station expansion network with the same precision according to the parameters of the 2000 coordinate system of the target city to obtain 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision.

Preferably, the performing adjustment calculation processing on the first control network, the second control network and the third control network of the target city respectively by using the CORS reference station main network as a starting point to obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network respectively specifically includes:

acquiring a third combined reference station of the main network of the CORS reference station and the first control network;

taking the third combined reference station as a starting point, and performing baseline calculation on the first control network to obtain a baseline calculation result corresponding to the first control network;

calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the first control network according to the baseline calculation result corresponding to the first control network and the coordinates of the third combined reference station;

according to the parameters of the 2000 coordinate system of the target city, carrying out Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the first control network to obtain 2000 coordinates of the target city corresponding to the reference station of the first control network;

acquiring a fourth superposed reference station of the first control network and the second control network;

taking the fourth coincident reference station as a starting point, and performing baseline calculation on the second control network to obtain a baseline calculation result corresponding to the second control network;

calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the second control network according to the baseline calculation result corresponding to the second control network and the coordinates of the fourth coincident reference station;

according to the parameters of the 2000 coordinate system of the target city, carrying out Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the second control network to obtain 2000 coordinates of the target city corresponding to the reference station of the second control network;

acquiring a fifth coincidence reference station of the second control network and the third control network;

taking the fifth coincident reference station as a starting point, and carrying out baseline calculation on the third control network to obtain a baseline calculation result corresponding to the third control network;

calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the third control network according to the baseline calculation result corresponding to the third control network and the coordinates of the fifth coincident reference station;

and performing Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the third control network according to the parameters of the 2000 coordinate system of the target city to obtain the 2000 coordinates of the target city corresponding to the reference station of the third control network.

The embodiment of the invention also provides a 2000 mapping reference frame unifying device, which comprises:

the CORS system establishing module is used for respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an CORS reference station expansion network with the same precision of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to the province to which the target city belongs;

the first coordinate conversion module is used for performing adjustment calculation on the CORS reference station main network of the target city by taking the reference station of the province CORS system as a starting point to obtain CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city, which correspond to the reference station of the CORS reference station main network of the target city;

the second coordinate conversion module is used for performing adjustment calculation processing on the CORS reference station expansion network with the same precision by taking the main network of the CORS reference station of the target city as a starting point to obtain CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city, which correspond to the reference station of the CORS reference station expansion network with the same precision;

and the third coordinate conversion module is used for respectively carrying out adjustment calculation processing on the first control network, the second control network and the third control network of the target city by taking the CORS reference station main network as a starting point, and respectively obtaining the CGCS2000 geodetic coordinates, the 1980 Western ampere coordinates and the 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network. Embodiments of the present invention further provide a 2000 mapping reference frame unifying apparatus, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor implements the 2000 mapping reference frame unifying method described above when executing the computer program.

Embodiments of the present invention further provide a 2000 mapping reference frame unifying apparatus, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor implements the 2000 mapping reference frame unifying method described above when executing the computer program.

An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, the apparatus on which the computer-readable storage medium is located is controlled to execute the above-mentioned 2000 mapping reference frame unified method.

Compared with the prior art, the 2000 mapping reference frame unifying method provided by the embodiment of the invention has the beneficial effects that: the 2000 mapping fiducial frame unifying method comprises: respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an equivalent-precision CORS reference station expansion network of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to the province to which the target city belongs; taking the reference station of the province CORS system as a starting point, and performing adjustment calculation on the main network of the CORS reference station to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city, which correspond to the reference station of the main network of the CORS reference station; with the main network of the CORS reference station as a starting point, carrying out adjustment calculation processing on the CORS reference station expansion network with the same precision to obtain CGCS2000 geodetic coordinates, 1980 Western-Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision; and respectively carrying out adjustment calculation processing on a first control network, a second control network and a third control network of the target city by taking the main network of the CORS reference station as a starting point, and respectively obtaining CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network. The method uses the CORS system as a reference to uniformly map the reference frame, can realize the dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize the information sharing of a coordinate system, and is convenient for city management and city construction. The embodiment of the invention also provides a 2000 mapping reference frame unified device and a computer readable storage medium.

Drawings

FIG. 1 is a flow chart of a 2000 mapping fiducial frame unifying method provided by an embodiment of the present invention;

fig. 2 is a schematic diagram of a 2000 mapping reference frame unifying apparatus according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a flowchart of a 2000 mapping frame unification method according to an embodiment of the present invention is shown, where the 2000 mapping frame unification method includes:

s100: respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an equivalent-precision CORS reference station expansion network of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to the province to which the target city belongs;

the original 3 sets of CORS systems in Guangzhou city have 20 reference stations in total, including: 8 planning GZCORS stations, 6 homeland GZCORS stations and 6 homeland GZBDCORS stations; in order to enhance the signal coverage of the edge area and ensure that the new CORS system really covers the whole Guangzhou range without gaps and dead angles, 6 GDCORS stations which are uniformly distributed are obtained from the GDCORS system of Guangzhou city peripheral area as peripheral reference stations of the new GZCORS system according to on-site investigation comparison and selection information of the GDCORS reference stations of Guangzhou city peripheral area which is acquired in advance, namely the GDCORS system of Guangzhou city peripheral area has 6 reference stations. The standard station selection rule of the Guangzhou CORS system is as follows: because the homeland GZCORS reference station and the homeland GZBDCORS reference station are on the same roof, the selection priority of the homeland GZCORS station is higher than that of the homeland GZBDCORS reference station; considering that the new GZCORS system continues to provide data services for departments such as Guangdong provincial gas station, Guangdong provincial earthquake station and the like, a reference station located in a station yard of the gas station and a bedrock reference point located on the ground are preferentially obtained.

Specifically, the plurality of CORS systems of the target city comprise a Guangzhou city continuous operation satellite positioning city measurement comprehensive service system, a Guangzhou city continuous operation satellite positioning service system and a CORS system supporting Beidou positioning; the province CORS system is a GDCORS system in Guangdong province.

In the embodiment, 17 reference stations are obtained from 3 sets of original CORS systems in Guangzhou city with 26 reference stations in total and GDCORS systems in Guangdong province in the peripheral area of the Guangzhou city, and a main network of the Guangzhou CORS reference stations is established; all 26 reference stations are obtained from 3 sets of original CORS systems in Guangzhou city with 26 reference stations in total and GDCORS systems in Guangdong province in the peripheral area of the Guangzhou city, and a CORS reference station expansion network with equal precision in Guangzhou is established. The extended network of the CORS reference station with the same Guangzhou precision is a standby network of a main network of the CORS reference station with the same Guangzhou precision, and comprises all reference stations covering the periphery of the Guangzhou and Guangzhou, so that the extended network of the CORS reference station with the same Guangzhou precision can be started under the condition that the main network of the CORS reference station with the same Guangzhou precision is invalid and useless, and a certain guarantee effect is achieved.

S200: taking the reference station of the province CORS system as a starting point, and performing adjustment calculation on the main network of the CORS reference station to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city, which correspond to the reference station of the main network of the CORS reference station;

s300: with the main network of the CORS reference station as a starting point, carrying out adjustment calculation processing on the CORS reference station expansion network with the same precision to obtain CGCS2000 geodetic coordinates, 1980 Western-Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision;

s400: and respectively carrying out adjustment calculation processing on a first control network, a second control network and a third control network of the target city by taking the main network of the CORS reference station as a starting point, and respectively obtaining CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network. The first control network is a quasi-geoid precision frame network of the target city, the second control network is a quasi-geoid precision high-precision control network of the target city, and the third control network is a 2000-year GPS first-level second-level plane measurement control network of the target city.

In this embodiment, the 2000 coordinates of the target city are the Guangzhou 2000 coordinates. The quasi-geoid precision frame net of the target city is a quasi-geoid precision frame net of Guangzhou city; the quasi-geoid precision high-precision control network of the target city is a quasi-geoid precision high-precision control network of Guangzhou city; the 2000-year GPS first-level second-level plane measurement control network of the target city is a 2000-year GPS first-level second-level plane measurement control network of Guangzhou city. The method uses the CORS system as a reference to uniformly map the reference frame, can realize the dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize the information sharing of a coordinate system, and is convenient for city management and city construction.

In an alternative embodiment, S100: respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an equivalent-precision CORS reference station expansion network of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to a province to which the target city belongs, and specifically comprises:

acquiring a third set number of reference stations from a plurality of CORS systems of a target city and reference stations of CORS systems of provinces around the target city, and establishing a new CORS system of the target city;

in this embodiment, according to the pre-collected on-site research comparison and selection information of each reference station, and according to the principles of stability, reliability, good observation conditions, and convenience in management, 8 reference stations are obtained from 20 reference stations of 3 sets of original CORS systems in guangzhou city, including 6 planning GZCORS reference stations and 2 homeland GZCORS reference stations, and the new GZCORS system is composed by combining 6 GDCORS stations, and the new CORS system of the target city, i.e., the new GZCORS system is established by combining 6 reference stations of GDCORS systems in guangdong province around the guangzhou city. The reference stations of the new GZCORS system are uniformly distributed, and can cover Guangzhou city and the peripheral area of the Guangzhou city under the condition of the minimum number of the reference stations, so that the mapping service requirement of the Guangzhou city can be met.

in this embodiment, all the reference stations of the new GZCORS system, that is, 14 reference stations, are obtained, and in combination with 20 reference stations of 3 sets of original CORS systems in guangzhou city and 14 reference stations of the new GZCORS system obtained from GDCORS system in guangdong province around guangzhou city, 3 reference stations are not repeated, and 17 reference stations are counted to establish a guangzhou CORS reference station master network. 3 reference stations are added on the basis of the reference station of the new GZCORS system, so that enough reference stations can be ensured for calculating the main net adjustment of the Guangzhou CORS reference station.

And acquiring k reference stations which are not overlapped with the reference stations of the new CORS system of the target city and all the reference stations of the new CORS system of the target city from a plurality of CORS systems of the target city and province CORS systems around the target city, and establishing an equivalent-precision CORS reference station expansion network of the target city, wherein the sum of the k reference stations and all the reference stations of the new CORS system of the target city is equal to the second set number.

In this embodiment, all the reference stations of the new GZCORS system, that is, 14 reference stations, are obtained, and 12 reference stations are not repeated with the 14 reference stations of the new GZCORS system, which are obtained from 20 reference stations of 3 sets of original CORS systems in guangzhou city and the GDCORS system in guangzhou province around the guangzhou city, and 26 reference stations are counted to establish an extended network of the CORS reference stations with the same precision in guangzhou, that is, the extended network of the CORS reference stations with the same precision in guangzhou city includes all the 26 reference stations of the 3 sets of original CORS systems in guangzhou city and the GDCORS system in guangzhou province around the guangzhou city, so as to ensure resource sharing of the 3 sets of original CORS systems in guangzhou city and the GDCORS system in guangzhou around the guangzhou city, and avoid missing of the reference stations to cause.

In an alternative embodiment, S200: taking the reference station of the province CORS system as a starting point, performing adjustment calculation on the CORS reference station main network to obtain CGCS2000 geodetic coordinates, 1980 Western ampere coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station main network, and specifically comprising the following steps:

In this embodiment, the parameters of the 2000 coordinate system of the target city are preset projection parameters of the 2000 coordinate of the target city, and specifically include a central meridian and a projection elevation surface.

In an optional embodiment, the taking the first coinciding reference station as a starting point, performing baseline solution on the cor reference station master network to obtain a baseline solution result corresponding to the cor reference station master network specifically includes:

In this embodiment, before the baseline solution is performed, the following preliminary operations need to be performed: acquiring observation data and antenna files of nearly 1 month from all 26 reference stations of 3 sets of original CORS systems in Guangzhou city and GDCORS systems in Guangdong province around the Guangzhou city in advance, and classifying and sorting the observation data, wherein the antenna files comprise antenna files corresponding to the reference stations with the converted antenna types within 1 month; the method comprises the steps of collecting selected global station data and precise ephemeris in advance, and carrying out frame and epoch recalculation processing on global station coordinates. The method comprises the steps of presetting a baseline calculation strategy, wherein the baseline calculation strategy comprises a calculation method, a calculation type, whether troposphere zenith delay is estimated or not, a cut-off altitude angle and the like, and specifically realizing the baseline calculation strategy by configuring various table files and adding corresponding parameters searched on an NGS website in antenna files of domestic instruments.

After the pre-operation is completed, GAMIT software is adopted, the first coincident reference station is taken as a starting point, and a base line consisting of 16 reference stations is calculated according to pre-collected global station data, precise ephemeris, observation data and antenna files corresponding to the 16 reference stations, so that a whole network solution result corresponding to a main network of the Guangzhou CORS reference station is obtained; acquiring a remaining reference station and 4 adjacent reference stations from a Guangzhou CORS reference station main network, and respectively performing baseline solution on 4 single baselines formed by the remaining reference station and the 4 adjacent reference stations according to the pre-acquired global station data, the precise ephemeris, the observation data corresponding to the remaining reference station and the antenna file by taking the first coincident reference station as a starting point to obtain 4 single baseline solution results corresponding to the Guangzhou CORS reference station main network; and the full-network solution result corresponding to the Guangzhou CORS reference station main network and the 4 single-baseline solution results form a baseline solution result corresponding to the Guangzhou CORS reference station main network. The method combining the multi-baseline solution and the single-baseline solution can be suitable for the condition that long and short baselines coexist in the main network of the Guangzhou CORS reference station, so that the precision of the main network of the Guangzhou CORS reference station meets the precision requirement of a B-level network.

In an alternative embodiment, the 2000 mapping fiducial frame unifying method further comprises:

since GAMIT software uses a net solution (i.e., a fully-combinational solution), the difference in sync loop closure for the Guangzhou CORS reference station master network has already been assigned at the time of baseline resolution. For the checking of the synchronization ring of the GAMIT software baseline solution, the nrms value of the baseline solution can be used as an index of the quality of the synchronization ring, namely when the synchronization ring closing difference of the main network of the CORS reference station in Guangzhou is equal to the nrms value; preferably, when the nrms value is not greater than 1.0, it is determined that the checking by the sync loop is passed.

the closing difference of the asynchronous ring reflects the reliability of field observation quality and baseline resolving quality of the main network of the CORS reference station in Guangzhou, and is more important to the GPS result quality compared with the closing difference of the synchronous ring.

and calculating the repetition precision of the main network of the CORS reference station according to the formula of a + bl, wherein sigma is the middle error of the baseline component, a is the fixed error of the component, b is the relative error, and l is the length of the baseline component.

according to the formula

Calculating a base line repetition rate of the main network of the CORS reference station;

wherein, c_iAre the components of the solution baseline for each time period,

is the covariance of the corresponding component(s),

is a weighted average of the respective baseline components, and R is the baseline repetition rate.

Judging whether a baseline resolving result corresponding to the CORS reference station main network meets preset baseline resolving precision and quality conditions according to the synchronous ring closing difference, the asynchronous ring closing difference and the baseline repetition rate of the CORS reference station main network;

In an alternative embodiment, S300: taking the main network of the CORS reference station as a starting point, performing adjustment calculation processing on the CORS reference station expansion network with the same precision to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision, and specifically comprising the following steps:

In this embodiment, the baseline solution is performed on the CORS extended network of the same precision by using the same baseline solution method as the CORS main network.

In this embodiment, the performing baseline solution on the CORS base station expansion network with the same precision by using the second combined base station as a starting point to obtain a baseline solution result corresponding to the CORS base station expansion network with the same precision specifically includes:

the second combined reference station is a reference station of the main network of the CORS reference station;

acquiring P reference stations which are not overlapped with the main network of the CORS reference station and Q adjacent reference stations which are adjacent to the P reference stations respectively from the CORS reference station expansion network with the same precision, wherein the total amount of the reference stations of the CORS reference station expansion network with the same precision is N + P;

taking the second combined reference station as a starting point, and respectively performing baseline solution on P x Q single baselines formed by the P reference stations and the Q adjacent reference stations according to the pre-acquired global station data, the precision ephemeris, the observation data corresponding to the P reference stations, the antenna file and a preset baseline solution strategy to obtain P x Q single baseline solution results corresponding to the CORS reference station expansion network with the same precision;

and obtaining a baseline calculation result corresponding to the CORS reference station expansion network with the same precision according to the baseline calculation result corresponding to the main network of the CORS reference station and the P x Q single baseline calculation results corresponding to the CORS reference station expansion network with the same precision.

Since the baseline calculation result corresponding to the CORS reference station master network is obtained, and the second superposed reference station is the reference station of the CORS reference station master network, the baseline calculation result corresponding to the CORS reference station master network can be directly adopted, and then the baseline calculation results of the rest reference stations of the CORS reference station expansion network with the same precision are calculated. Specifically, 17 main network reference stations of the CORS reference station are provided, that is, 9 reference stations to be subjected to baseline solution in the equivalent-precision CORS reference station expansion network are provided, GAMIT software is adopted to obtain the remaining 9 reference stations and 4 adjacent reference stations adjacent to the remaining 9 reference stations respectively from the equivalent-precision CORS reference station expansion network in Guangzhou, the second combined reference station is used as a calculation point, and baseline solution is performed on 36 single baselines formed by the remaining 9 reference stations and the 4 adjacent reference stations adjacent to the remaining 9 reference stations respectively according to the pre-acquired global station data, the precision ephemeris, observation data corresponding to the remaining 9 reference stations and antenna files, so as to obtain 36 single baseline solution results corresponding to the equivalent-precision CORS reference station expansion network in Guangzhou; and the base line calculation result corresponding to the Guangzhou CORS reference station main network and the 36 single base line calculation results corresponding to the Guangzhou CORS reference station expansion network with the same precision form the base line calculation result corresponding to the Guangzhou CORS reference station expansion network with the same precision. The method combining the multi-baseline solution and the single-baseline solution can be suitable for the condition that long and short baselines coexist in the extended network of the CORS reference station with the same precision in Guangzhou, so that the precision of the extended network of the CORS reference station with the same precision in Guangzhou can meet the precision requirement of a B-level network. The baseline calculation of the extended network of the CORS reference station with the same Guangzhou precision directly adopts the baseline calculation result corresponding to the main network of the CORS reference station in Guangzhou, so that the calculation process is reduced, and the calculation efficiency is improved.

Further, acquiring a synchronous ring closure difference of the extended network of the CORS reference station with the same Guangzhou precision according to an nrms value of a baseline resolving result corresponding to the extended network of the CORS reference station with the same Guangzhou precision; calculating the closing difference of an asynchronous ring of the extended network of the CORS reference station with the same Guangzhou precision according to a base line formed by a major network of the CORS reference station with the same Guangzhou precision and 36 single base lines formed by the remaining 9 reference stations and 4 adjacent reference stations in the extended network of the CORS reference station with the same Guangzhou precision; carrying out linear fitting according to the fixed error and the proportional error of the baseline component corresponding to 36 single baselines consisting of the master network of the Guangzhou CORS base station, the remaining 9 base stations in the extended network of the Guangzhou CORS base station with the same precision and 4 adjacent base stations, and calculating the repeated precision of the extended network of the CORS base station with the same precision in Guangzhou; calculating the baseline repetition rate of the extended network of the CORS reference station with the equal Guangzhou precision according to the baseline calculation result corresponding to the extended network of the CORS reference station with the equal Guangzhou precision and the repetition precision of the extended network of the CORS reference station with the equal Guangzhou precision; and judging whether the baseline resolving result corresponding to the extended network of the CORS reference station with the same precision in Guangzhou meets the preset baseline condition or not according to the synchronous ring closing difference, the asynchronous ring closing difference and the baseline repetition rate of the extended network of the CORS reference station with the same precision in Guangzhou. And when the baseline calculation result corresponding to the extended network of the CORS base station with the same precision in Guangzhou does not meet the preset baseline condition, the baseline calculation is carried out on the extended network of the CORS base station with the same precision in Guangzhou again.

In an alternative embodiment, S400: with the CORS reference station main network as a starting point, respectively performing adjustment calculation processing on a first control network, a second control network and a third control network of the target city to respectively obtain CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city, which correspond to reference stations of the first control network, the second control network and the third control network, and specifically comprises the following steps:

according to the baseline calculation result corresponding to the first control network and the coordinates of the third combined reference station, calculating the CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the first control network;

In this embodiment, the baseline solution method the same as that of the CORS reference station main network is adopted to perform baseline solution on the quasi-geoid refinement framework network of the target city, the quasi-geoid refinement high-precision control network of the target city, and the 2000-year GPS primary second-level measurement control network of the target city, and a repeated description is not repeated below. The main network of the Guangzhou CORS reference station is taken as a starting point and is sequentially transmitted downwards, and adjustment is carried out to obtain CGCS2000 geodetic coordinates, 1980 Western ampere coordinates and Guangzhou 2000 coordinates of the reference station of the Guangzhou city geodetic level refinement frame network, the Guangzhou city geodetic level refinement high-precision control network and the Guangzhou city 2000 GPS first-level (second-level) plane measurement control network, so that unnecessary calculation processes can be reduced, and the efficiency is improved.

Referring to fig. 2, an embodiment of the present invention further provides a diagram of a 2000 mapping reference frame unifying apparatus, where the 2000 mapping reference frame unifying apparatus includes:

a CORS system establishing module 1, configured to obtain a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and establish a CORS reference station main network of the target city corresponding to the first set number and an CORS reference station expansion network of the target city corresponding to the second set number and having the same accuracy; the province CORS system is a CORS system corresponding to the province to which the target city belongs;

The first coordinate conversion module 2 is used for performing adjustment calculation on the CORS reference station main network of the target city by taking the reference station of the province CORS system as a starting point to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station main network of the target city;

the second coordinate conversion module 3 is used for performing adjustment calculation processing on the CORS reference station expansion network with the same precision by taking the CORS reference station main network of the target city as a starting point to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city, which correspond to the reference station of the CORS reference station expansion network with the same precision;

and the third coordinate conversion module 4 is configured to perform adjustment calculation processing on the first control network, the second control network, and the third control network of the target city respectively by using the main network of the CORS reference station of the target city as a starting point, and obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates, and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network, and the third control network respectively. The first control network is a quasi-geoid precision frame network of the target city, the second control network is a quasi-geoid precision high-precision control network of the target city, and the third control network is a 2000-year GPS first-level second-level plane measurement control network of the target city.

In this embodiment, the 2000 coordinates of the target city are the Guangzhou 2000 coordinates. The quasi-geoid precision frame net of the target city is a quasi-geoid precision frame net of Guangzhou city; the quasi-geoid precision high-precision control network of the target city is a quasi-geoid precision high-precision control network of Guangzhou city; the 2000-year GPS first-level second-level plane measurement control network of the target city is a 2000-year GPS first-level second-level plane measurement control network of Guangzhou city. The device uses the CORS system as a reference to uniformly survey and draw a reference frame, can realize the dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize the information sharing of a coordinate system, and is convenient for city management and city construction.

In an optional embodiment, the CORS system establishing module includes:

the new CORS system establishing module is used for acquiring a third set number of reference stations from a plurality of CORS systems of a target city and the reference stations of CORS systems of provinces around the target city and establishing a new CORS system of the target city;

a CORS reference station main network establishing module, configured to acquire, from a plurality of CORS systems in a target city and province CORS systems around the target city, i reference stations that do not overlap with reference stations of a new CORS system in the target city and all reference stations of the new CORS system in the target city, and establish a CORS reference station main network in the target city, where a sum of the i reference stations and all reference stations of the new CORS system in the target city is equal to the first set number;

and the equivalent-precision CORS reference station expansion network establishing module is used for acquiring k reference stations which are not repeated with the reference station of the new CORS system of the target city and all reference stations of the new CORS system of the target city from the plurality of CORS systems of the target city and the province CORS systems around the target city, and establishing the equivalent-precision CORS reference station expansion network of the target city, wherein the sum of the k reference stations and all reference stations of the new CORS system of the target city is equal to the second set quantity.

In an alternative embodiment, the first coordinate conversion module comprises:

the first superposition reference station acquisition module is used for acquiring a first superposition reference station of the provincial CORS system and the main network of the CORS reference station;

the main network baseline calculation module is used for performing baseline calculation on the main network of the CORS reference station by taking the first superposition reference station as a starting point to obtain a baseline calculation result corresponding to the main network of the CORS reference station;

the first coordinate calculation module is used for calculating CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the CORS reference station main network according to the baseline calculation result corresponding to the CORS reference station main network and the coordinates of the first superposition reference station;

and the second coordinate calculation module is used for performing Gaussian projection on the CGCS2000 geodetic coordinate corresponding to the reference station of the CORS reference station main network according to the parameters of the 2000 coordinate system of the target city to obtain the 2000 coordinate of the target city corresponding to the reference station of the CORS reference station main network.

In an optional embodiment, the main network baseline calculation module is configured to obtain N-1 reference stations from the CORS reference station main network, where a total amount of the reference stations of the CORS reference station main network is N, and the baseline lengths of the N-1 reference stations are uniform;

the main network baseline calculation module is used for performing baseline calculation on a baseline formed by the N-1 reference stations according to pre-acquired global station data, precise ephemeris, observation data corresponding to the N-1 reference stations, antenna files and a preset baseline calculation strategy by taking the first superposition reference station as a starting point to obtain a full network solution result corresponding to the main network of the CORS reference station;

the main network baseline resolving module is used for acquiring an Nth reference station and M adjacent reference stations from the CORS reference station main network, wherein the Nth reference station is a reference station left after acquiring N-1 reference stations of the CORS reference station main network, and the M adjacent reference stations are M reference stations adjacent to the Nth reference station in the CORS reference station main network;

the main network baseline calculation module is used for taking the first coincident reference station as a starting point, and respectively performing baseline calculation on M single baselines formed by the Nth reference station and the M adjacent reference stations according to the pre-acquired global station data, the precise ephemeris, the observation data corresponding to the N-1 reference stations, the antenna file and a preset baseline calculation strategy to obtain M single baseline solution results corresponding to the main network of the CORS reference station;

the main network baseline calculation module is used for obtaining a baseline calculation result corresponding to the main network of the CORS reference station according to a full-network calculation result corresponding to the main network of the CORS reference station and M single-baseline calculation results.

In an alternative embodiment, the 2000 mapping fiducial frame unifying apparatus further comprises:

the synchronous ring closure difference calculation module is used for calculating an nrms value of a result according to a base line corresponding to the main network of the CORS reference station to obtain a synchronous ring closure difference of the main network of the CORS reference station;

the asynchronous ring closing difference calculation module is used for calculating the asynchronous ring closing difference of the main network of the CORS reference station according to a base line formed by the N-1 reference stations and M single base lines formed by the Nth reference station and the M adjacent reference stations;

the repetition precision calculation module is used for respectively carrying out linear fitting on the baseline component formed by the N-1 reference stations, the fixed error and the proportional error of the baseline component corresponding to the M single baselines formed by the Nth reference station and the M adjacent reference stations and calculating the repetition precision of the main network of the CORS reference station;

the base line repetition rate calculation module is used for calculating the base line repetition rate of the main network of the CORS reference station according to a base line calculation result corresponding to the main network of the CORS reference station and the repetition precision of the main network of the CORS reference station;

the first judgment module is used for judging whether a baseline resolving result corresponding to the CORS reference station main network meets preset baseline resolving precision and quality conditions according to the synchronous ring closing difference, the asynchronous ring closing difference and the baseline repetition rate of the CORS reference station main network;

In an alternative embodiment, the second coordinate conversion module includes:

the second combined reference station acquisition module is used for acquiring a second combined reference station of the main network of the CORS reference station and the extended network of the CORS reference station with the same precision;

the extended network baseline calculation module is used for performing baseline calculation on the extended network of the CORS base station with the same precision by taking the second combined base station as a starting point to obtain a baseline calculation result corresponding to the extended network of the CORS base station with the same precision;

the third coordinate calculation module is used for calculating CGCS2000 geodetic coordinates and 1980 Western-ampere coordinates corresponding to the reference station of the CORS reference station extended network with the same precision according to the baseline calculation result corresponding to the CORS reference station extended network with the same precision and the coordinates of the second overlapped reference station;

and the fourth coordinate calculation module is used for performing Gaussian projection on the CGCS2000 geodetic coordinates corresponding to the reference station of the CORS reference station expansion network with the same precision according to the parameters of the 2000 coordinate system of the target city to obtain the 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision.

In an alternative embodiment, the fourth coordinate conversion module includes:

the third combined reference station calculation module is used for acquiring a main network of the CORS reference station and a third combined reference station of the first control network;

the first baseline calculation module is used for performing baseline calculation on the first control network by taking the third combined reference station as a starting point to obtain a baseline calculation result corresponding to the first control network;

a fifth coordinate calculation module, configured to calculate, according to the baseline solution result corresponding to the first control network and the coordinate of the third combined reference station, a CGCS2000 geodetic coordinate and a 1980 sienna coordinate corresponding to the reference station of the first control network;

a sixth coordinate calculation module, configured to perform gaussian projection on the CGCS2000 geodetic coordinate corresponding to the reference station of the first control network according to the parameter of the 2000 coordinate system of the target city, to obtain a 2000 coordinate of the target city corresponding to the reference station of the first control network;

a fourth superposition reference station calculation module, configured to obtain a fourth superposition reference station of the first control network and the second control network;

the second baseline calculation module is used for performing baseline calculation on the second control network by taking the fourth superposition reference station as a starting point to obtain a baseline calculation result corresponding to the second control network;

a seventh coordinate calculation module, configured to calculate, according to the baseline calculation result corresponding to the second control network and the coordinate of the fourth coincident reference station, a CGCS2000 geodetic coordinate and a 1980 sienna coordinate corresponding to the reference station of the second control network;

the eighth coordinate calculation module is configured to perform gaussian projection on the CGCS2000 geodetic coordinate corresponding to the reference station of the second control network according to the parameter of the 2000 coordinate system of the target city, so as to obtain a 2000 coordinate of the target city corresponding to the reference station of the second control network;

a fifth coincidence reference station calculation module, configured to obtain a fifth coincidence reference station of the second control network and the third control network;

the third baseline calculation module is used for performing baseline calculation on the third control network by taking the fifth coincidence reference station as a starting point to obtain a baseline calculation result corresponding to the third control network;

a ninth coordinate calculation module, configured to calculate CGCS2000 geodetic coordinates and 1980 sienna coordinates corresponding to the reference station of the third control network according to the baseline calculation result corresponding to the third control network and the coordinates of the fifth coincident reference station;

and the tenth coordinate calculation module is used for performing Gaussian projection on the CGCS2000 geodetic coordinate corresponding to the reference station of the third control network according to the parameters of the 2000 coordinate system of the target city to obtain the 2000 coordinate of the target city corresponding to the reference station of the third control network.

The first baseline calculation module, the second baseline calculation module and the third baseline calculation module have the same functions as the main network baseline calculation module; the synchronous ring closing difference calculation module, the asynchronous ring closing difference calculation module, the repetition precision calculation module, the baseline repetition rate calculation module and the first judgment module are used for carrying out precision and quality judgment on baseline resolving results corresponding to the CORS reference station extended network with the same precision, the geoid refinement frame network of the target city, the second control network and the third control network, and the description is not given below.

Illustratively, the computer program may be partitioned into one or more modules/units that are stored in the memory and executed by the processor to implement the invention. The one or more modules/units may be a series of computer program instruction segments capable of performing certain functions, which are used to describe the execution of the computer program in the 2000 mapping reference frame unifying apparatus. For example, the computer program may be partitioned into functional modules in the 2000 mapping fiducial framework unifying apparatus described above.

The 2000 mapping reference frame unified device can be a desktop computer, a notebook computer, a palm computer, a cloud server and other computing equipment. The 2000 mapping fiducial frame unifying apparatus may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the illustration is merely an example of a 2000 mapping reference frame unifying apparatus and does not constitute a limitation of the 2000 mapping reference frame unifying apparatus, and may include more or less components than those shown, or some components in combination, or different components, for example, the 2000 mapping reference frame unifying apparatus may further include an input-output device, a network access device, a bus, etc.

The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like that is the control center of the 2000 survey reference frame unified device, connecting the various parts of the entire 2000 survey reference frame unified device using various interfaces and lines.

The memory may be used to store the computer programs and/or modules, and the processor may implement the various functions of the 2000 mapping reference frame unifying apparatus by running or executing the computer programs and/or modules stored in the memory, and invoking the data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.

Wherein the 2000 mapping frame of reference unified device integrated module/unit, if implemented in the form of software functional unit and sold or used as a stand-alone product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.

Compared with the prior art, the 2000 mapping reference frame unifying method provided by the embodiment of the invention has the beneficial effects that: the 2000 mapping fiducial frame unifying method comprises: respectively acquiring a first set number of reference stations and a second set number of reference stations from a plurality of CORS systems of a target city and province CORS systems around the target city, and respectively establishing a CORS reference station main network of the target city corresponding to the first set number and an equivalent-precision CORS reference station expansion network of the target city corresponding to the second set number; the province CORS system is a CORS system corresponding to the province to which the target city belongs; taking the reference station of the province CORS system as a starting point, and performing adjustment calculation on the main network of the CORS reference station to obtain CGCS2000 geodetic coordinates, 1980 Western Ann coordinates and 2000 coordinates of the target city, which correspond to the reference station of the main network of the CORS reference station; with the main network of the CORS reference station as a starting point, carrying out adjustment calculation processing on the CORS reference station expansion network with the same precision to obtain CGCS2000 geodetic coordinates, 1980 Western-Ann coordinates and 2000 coordinates of the target city corresponding to the reference station of the CORS reference station expansion network with the same precision; and respectively carrying out adjustment calculation processing on the geoid-like level surface refined frame network, the second control network and the third control network of the target city by taking the main network of the CORS reference station as a starting point, and respectively obtaining CGCS2000 geoid coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city corresponding to the geoid-like level surface refined frame network, the second control network and the reference station of the third control network of the target city. The method uses the CORS system as a reference to uniformly map the reference frame, can realize the dynamic maintenance and updating of 2000 geodetic coordinates of a target city, can realize the information sharing of a coordinate system, and is convenient for city management and city construction.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. A 2000 mapping fiducial frame unification method, comprising:

respectively carrying out adjustment calculation processing on a first control network, a second control network and a third control network of the target city by taking the main network of the CORS reference station as a starting point, and respectively obtaining CGCS2000 geodetic coordinates, 1980 Western-ampere coordinates and 2000 coordinates of the target city, which correspond to the reference stations of the first control network, the second control network and the third control network;

the first control network is a quasi-geoid precision frame network of the target city, the second control network is a quasi-geoid precision high-precision control network of the target city, and the third control network is a 2000-year GPS first-level second-level plane measurement control network of the target city.

2. The method according to claim 1, wherein the first and second predetermined numbers of reference stations are respectively obtained from a plurality of CORS systems in a target city and from province CORS systems around the target city, and a CORS reference station main network in the target city corresponding to the first predetermined number and an equivalent-precision CORS reference station extended network in the target city corresponding to the second predetermined number are respectively established; the province CORS system is a CORS system corresponding to a province to which the target city belongs, and specifically comprises:

acquiring i reference stations which are not repeated with reference stations of a new CORS system of a target city and all reference stations of the new CORS system of the target city from a plurality of CORS systems of the target city and province CORS systems around the target city, and establishing a main network of CORS reference stations of the target city, wherein the sum of the i reference stations and all reference stations of the new CORS system of the target city is equal to the first set number;

3. The method for unifying 2000 mapping reference frames according to claim 1, wherein the step of performing adjustment calculation on the main cor reference station network by using the reference station of the province CORS system as a starting point to obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference station of the main cor reference station network specifically comprises:

4. A 2000 mapping reference frame unifying method as claimed in claim 3, wherein the performing baseline solution on the CORS reference station master network with the first coinciding reference station as a starting point to obtain a baseline solution result corresponding to the CORS reference station master network specifically comprises:

5. The 2000 mapping fiducial frame unifying method of claim 4, the 2000 mapping fiducial frame unifying method further comprising:

6. The method for unifying 2000 mapping reference frames according to claim 1, wherein the step of performing adjustment calculation on the equivalent-precision CORS reference station expansion network by using the CORS reference station main network as a starting point to obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference station of the equivalent-precision CORS reference station expansion network specifically comprises:

7. The method for unifying 2000 mapping reference frames according to claim 1, wherein the taking the main cor s reference station network as a starting point, respectively performing adjustment calculation processing on the first control network, the second control network and the third control network of the target city to respectively obtain CGCS2000 geodetic coordinates, 1980 sienna coordinates and 2000 coordinates of the target city corresponding to the reference station of the first control network, the second control network and the third control network, specifically comprises:

8. A 2000 survey datum frame unifying apparatus, comprising:

the third coordinate conversion module is used for respectively carrying out adjustment calculation processing on the first control network, the second control network and the third control network of the target city by taking the CORS reference station main network as a starting point, and respectively obtaining CGCS2000 geodetic coordinates, 1980 Western ampere coordinates and 2000 coordinates of the target city corresponding to the reference stations of the first control network, the second control network and the third control network;

9. A 2000 mapping fiducial frame unifying apparatus comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, the processor when executing the computer program implementing the 2000 mapping fiducial frame unifying method of any of claims 1-7.

10. A computer-readable storage medium, comprising a stored computer program, wherein the computer program, when executed, controls an apparatus on which the computer-readable storage medium is stored to perform the 2000 mapping frame uniform method of any of claims 1-7.