CN102223709A - Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time - Google Patents
Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time Download PDFInfo
- Publication number
- CN102223709A CN102223709A CN2011101548448A CN201110154844A CN102223709A CN 102223709 A CN102223709 A CN 102223709A CN 2011101548448 A CN2011101548448 A CN 2011101548448A CN 201110154844 A CN201110154844 A CN 201110154844A CN 102223709 A CN102223709 A CN 102223709A
- Authority
- CN
- China
- Prior art keywords
- coordinate
- benchmark
- pseudo
- server
- special datum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a method for acquiring coordinates based on a continuous operational reference system (CORS) in real time, and relates to a method for acquiring a specific reference Gaussian plane rectangular coordinate based on the CORS by using general packet radio service (GPRS) (or code division multiple access (CDMA)) communication technologies in real time. According to the invention, a middle server is arranged between a mobile station and a server for bi-directionally communicating with the mobile station and the server respectively, decoding virtual reference station (VRS) difference information which is generated by the server, and appropriately changing the coordinates (X, Y, Z) so that a user of the mobile station cannot acquire the real world geodetic system (WGS) 84 coordinate; corresponding false parameters are set on a holding book of the mobile station so as to acquire the specific reference Gaussian plane rectangular coordinate and avoid real parameters issuing. By the system, software, hardware and use habit of the user are not changed; the specific reference Gaussian plane rectangular coordinate is acquired; and elevation of the measured position is directly acquired by using ground level precise models, so that the working efficiency of the user is greatly improved; and the method is widely applied in fields such as surveying and mapping controlling, precise navigating and the like.
Description
Technical field
The present invention relates to utilize GPRS or CDMA mechanics of communication, obtain the method for the Gaussian plane rectangular coordinate of special datum based on the CORS system in real time.Described special datum comprises country 54,80 or local benchmark etc.
Background technology
Because the development of technology of network RTK has improved precision and efficient that coordinate obtains, various places have been strengthened the CORS system and have been built dynamics.The CORS system can directly obtain the coordinate of WGS84 benchmark, and actual the mapping when using often needs to obtain the coordinate under the special datum.In order to obtain the Gaussian plane rectangular coordinate of special datum, common way is: on the mobile radio station hand is thin necessary parameter (as origin value, central meridian, seven parameters etc.) is set, but these parameters are can not be externally disclosed according to relevant regulations.
At present, in order to promote the CORS system applies, a large amount of research has also been done by Tian Bao, Lycra company and domestic part universities and colleges, obtains certain progress, still has following defective:
1, part realizes maintaining secrecy of coordinate transformation parameter, but the maintaining secrecy of the coordinate basis of being unrealized, as origin value, central meridian etc.
2, Tian Bao, Lycra company utilize the RTCM31 agreement, externally dynamically issue coordinate transformation parameter, relevant unit can obtain relevant information by resolving the RTCM31 agreement, has the possibility of divulging a secret, need the customer upgrade relevant device simultaneously, user's use cost is strengthened.
The prior art scheme all can not be implemented under the situation that satisfies related request, obtains the Gaussian plane rectangular coordinate of special datum in real time, therefore can't widespread adoption promote.
Coordinate under any benchmark has following three kinds of forms:
1, geodetic coordinates: with (B, L, H) expression, wherein B represents that dimension, L represent longitude, H represents geodetic height
2, rectangular space coordinate: as Fig. 1 so that (Z) expression is mainly used in the seven parameter Coordinate Conversion processes that realize in the present invention for X, Y.
3, Gaussian plane rectangular coordinate: with (x, y, h) wherein: x, y represents plane coordinates, h represents normal height
More than three kinds of coordinate form can change:
Gauss just calculates, (B, L, H) → (x, y, h)
Geodetic coordinates changes rectangular space coordinate, BLH → XYZ
Rectangular space coordinate changes geodetic coordinates, XYZ → BLH
Wherein:
N: prime vertical radius
A, b: the long and short semiaxis of the earth
X: the equator is to the meridian arc length of latitude B
T: parallel circle bent half
η: vertical line is at the prime vertical component
ζ: height anomaly
L: with central meridian through poor
Main employing Gaussian plane rectangular coordinate in government planning, construction, management and engineering project utilization (x, y, h).Purpose of the present invention is exactly to be implemented under the situation that adopts pseudo-benchmark and pseudo-seven parameters simultaneously, realizes Gauss plane coordinate (x, y, obtaining h).
Summary of the invention
The present invention proposes a kind of based on the CORS system, under the situation of underground actual parameter, obtain the method for the Gaussian plane rectangular coordinate of special datum in real time: by between the server and mobile radio station of CORS system, set up an intermediate server, obtain the communication information between server end and the mobile radio station, to the rectangular space coordinate in the information (X, Y, Z) carry out conversion according to certain rule, make mobile radio station can not directly obtain real WGS84 coordinate.Mobile radio station carries out coordinate Calculation by mating a pseudo-benchmark of cover and pseudo-parameter then, thereby obtains the Gaussian plane rectangular coordinate of special datum, reaches the purpose of avoiding open actual parameter.
The technical scheme that adopts is so for achieving the above object: promptly a kind ofly obtain the method for the coordinate of certain special datum in real time based on the CORS system, method comprises:
1), an intermediate server is set between CORS server and mobile radio station, and set up the transform data storehouse at intermediate server; According to positioning accuracy, selected geographical space is divided into some cubes, adopt seven parametric methods to calculate each cubical 8 summit P respectively
I-8The coordinate D of corresponding certain the special datum I of WGS84 benchmark
1-8,With the pseudo-benchmark I that is complementary with certain special datum I ' coordinate D '
1-8: promptly
（⊿X，⊿Y，⊿Z）
1-8=?D?
1-8（X
I，Y
I，Z
I）-?D′
1-8（X
I′，Y
?I′，Z
?I′）
In the formula:
P
I-8It is the WGS84 benchmark on eight summits of a cube;
D
I-8(X
I, Y
I, Z
I) be the rectangular space coordinate of certain special datum I on eight summits of same cube;
D '
1-8(X
I', Y
I', Z
I') for the pseudo-benchmark I that is complementary with certain special datum I on eight summits of same cube ' rectangular space coordinate;
(⊿ X ， ⊿ Y ， ⊿ Z)
1-8For the rectangular space coordinate between certain special datum and the pseudo-benchmark that matches relatively poor;
Set up certain corresponding with it special datum of all cube summits in the WGS84 benchmark, and and the pseudo-benchmark that is complementary of special datum between rectangular space coordinate relatively poor, and with all being stored in the transform data storehouse than difference; Cube is divided more little, and its corresponding precision is high more;
2), mobile radio station sends the general location NMEA of user's request and WGS84 benchmark to intermediate server by GPRS or CDMA communication, intermediate server directly is transmitted to the CORS server with user's request and general location NMEA, the CORS server is according to general location NMEA, generate differential correcting VRS information A, and send to intermediate server;
When middle server receives the differential correcting VRS information of CORS server generation, extract the virtual reference station coordinates P(X that comprises in this differential correcting VRS information A
84, Y
84, Z
84), determine this coordinate P(X then
84, Y
84, Z
84) fall into above-mentioned certain cube, retrieve again each summit of this cube 8 of above-mentioned transform data library storage than difference, 8 adopt the arithmetic average method to calculate this and virtual reference station coordinates P(X this than difference
84, Y
84, Z
84) certain special datum I pseudo-transformation of criterion amount E(⊿ X ， ⊿ ⊿ Y ， ⊿ Z that is complementary with it); The formula of arithmetic average method is as follows:
In the formula: E (⊿ X), E (⊿ Y), E (⊿ Z) be respectively the component of converted quantity E in rectangular coordinate system in space;
With this converted quantity E(⊿ X, ⊿ Y, ⊿ Z) with the virtual reference station coordinates P(X that extracts
84, Y
84, Z
84) add, subtract, multiplication and division or mix arithmetical operation after, generate new virtual reference station coordinates P ' (X
84', Y
84', Z
84') write back in the VRS information A, make the VRS information A change into VRS information B, utilize GPRS or CDMA communication that described VRS information B is sent to mobile radio station again and carry out Difference Calculation, thereby make mobile radio station can not obtain the coordinate of true WGS84 benchmark;
3), at the pseudo-benchmark of thin configuration one cover of mobile radio station hand, comprise central meridian, reference ellipsoid major radius, ellipticity, the north to side-play amount, east to side-play amount.
4), the mobile radio station hand thin be provided with above-mentioned puppet be complementary Coordinate Conversion seven parameters C (
,
,
,
,
,
, m), utilize the husky model of boolean, dynamically realize the Coordinate Conversion of WGS84 and pseudo-benchmark; The conversion formula of the husky model of boolean is as follows:
In the formula: X
84', Y
84', Z
84' be the rectangular space coordinate of the WGS84 benchmark among the VRS information B; X, Y, Z are the rectangular space coordinate of pseudo-benchmark
M: scale parameter
Above-mentioned seven parameter utilizations are no less than 3 same places, adopt least square method to calculate;
By above setting, the mobile terminal can obtain in real time pseudo-benchmark rectangular space coordinate (X, Y, Z), utilize again by gauss projection calculate Gauss plane coordinate (x, y, h); The Gauss plane coordinate value of this Gauss plane coordinate value and certain special datum is consistent, and has avoided the announcement of the coordinate transformation parameter of the true benchmark of certain special datum and WGS84 benchmark and certain special datum;
Described special datum comprises national 54 coordinates, national 80 coordinates or local coordinate basis.
The invention has the beneficial effects as follows: utilize computer software technology, and GPRS(or CDMA) mechanics of communication, do not increase the mobile terminal customer using cost and changing under the prerequisite of use habit, only the thin coordinate parameters of mobile radio station hand is being carried out necessary setting, obtaining the coordinate of preferred coordinates system.
Description of drawings
Fig. 1 rectangular coordinate system in space schematic diagram;
Fig. 2 existing C ORS systematic survey schematic flow sheet;
Fig. 3 CORS systematic survey of the present invention schematic flow sheet;
Fig. 4 is virtual reference station coordinates P(X
84, Y
84, Z
84) fall into the schematic diagram of certain cube.
Embodiment
The present invention further specifies by the embodiment of a non-limiting individual character.As Fig. 2, when traditional CORS system carried out measurement of coordinates, mobile radio station utilized GPRS(or CDMA) mechanics of communication sends general location NMEA(WGS84 benchmark to server).Server can generate a VRS correcting information near NMEA, utilize GPRS(or CDMA again) mechanics of communication issues mobile radio station and carries out Difference Calculation.Mobile radio station can directly obtain the coordinate of WGS84 benchmark, obtains the Gaussian plane rectangular coordinate of special datum if desired, then must on the mobile radio station hand is thin respective coordinates benchmark and conversion parameter be set.
For avoiding the true coordinate parameter openly to issue, on the basis of Fig. 2, done small change, between the server and mobile radio station of CORS system, set up an intermediate server, carry out both-way communication with server and mobile radio station respectively, as Fig. 3.Intermediate server obtains the rectangular space coordinate (X in the VRS information, Y, Z), in the transform data storehouse, inquire about, and go out converted quantity according to the query note interpolation by computing module, with converted quantity and rectangular space coordinate (X, Y, Z) behind the combinatorial operation, being written in the VRS information, utilizing GPRS(or CDMA again) mechanics of communication issues mobile radio station and carries out Difference Calculation, and what mobile radio station obtained no longer is the coordinate of true WGS84 benchmark, only need the corresponding fase corrdinate parameter of coupling on the mobile radio station hand is thin, can obtain the Gaussian plane rectangular coordinate of special datum.
When system moves, under the WGS84 benchmark, will select geographical space and be divided into several cubes, cubical big I determines that according to required positioning accuracy the more little precision of cube is high more; Based on the cube summit, adopt corresponding coordinate transformation parameter to calculate the rectangular space coordinate of special datum and pseudo-benchmark respectively, it is poor to ask then.With ask poor (variable quantity) of the special datum rectangular space coordinate of each cube summit correspondence and pseudo-reference space rectangular coordinate, and be stored in database.As shown in table 1 below:
Table 1 cube summit variable quantity storage mode
Arrange and after the signal initialization survey finishes when system configuration, just can carry out network RTK and obtain preferred coordinates in real time and be tied to form really:
At first, mobile radio station utilizes GPRS(or CDMA) mechanics of communication sends user's request and general location NMEA(WGS84 benchmark to intermediate server), intermediate server directly the user is asked and general location NMEA is transmitted to server.Server generates differential correcting information VRS, and sends to intermediate server according to user's request and general location NMEA.
Secondly, intermediate server from the VRS difference information, extract rectangular space coordinate (X, Y, Z), and in the transform data storehouse, inquire about, retrieve this point (X, Y, Z) converted quantity on adjacent cube summit, computing module is according to the gained query note, adopt arithmetic mean method to calculate this point (X, Y, the difference of special datum Z) and pseudo-reference space rectangular coordinate.
The 3rd, intermediate server just converted quantity and rectangular space coordinate (X, Y Z) add, subtract, multiplication and division or mix arithmetical operation after, being written in the VRS information, utilizing GPRS(or CDMA again) the mechanics of communication VRS that will contain special datum information issues mobile radio station and carries out Difference Calculation.The coordinate that the flow process station obtains at this moment has not been the coordinate of true WGS84 benchmark.
The 4th, pseudo-benchmark is set on the mobile radio station hand is thin:
Central meridian 105.5 degree;
Reference ellipsoid major radius: 6378345 meters;
Ellipticity: 298.35;
North is inclined to one side: 0 meter;
East is inclined to one side: 500000 meters
The 5th, in thin Coordinate Conversion seven parameters that are provided with between WGS84 and the above-mentioned pseudo-benchmark of mobile radio station hand.Seven parameter utilizations are no less than the same place of 3 WGS84 and pseudo-benchmark, adopt least square method to calculate, and be arranged on hand thin on:
X translation parameters: 457.097762
Y translation parameters :-47.580393
Z translation parameters :-2.867187
X rotation parameter :-000:00:04.109044
Y rotation parameter :-000:00:00.504396
Z rotation parameter: 000:00:02.677355
Scale parameter: 1.000046198
The 6th, after the thin setting of mobile radio station hand was finished, the user just can directly obtain the Gauss plane coordinate of special datum.Utilize native system to carry out 43 points of field test, use special datum and corresponding coordinate conversion parameter and pseudo-benchmark and corresponding coordinate conversion parameter to measure respectively, comparative statistics as a result such as following table 2:
Table 2 adopts special datum and parameter and pseudo-benchmark and parameter measurement coordinate comparison sheet
Adopt the relatively poor satisfied measurement related request of the Gauss plane coordinate that two kinds of benchmark and seven parameter measurements go out as can be seen.
The present invention does necessary conversion by the VRS coordinate information to the CORS system, make the user can not obtain the true coordinate of WGS84 benchmark, by on the mobile radio station hand is thin, pseudo-benchmark and pseudo-parameter being set, the Gaussian plane rectangular coordinate of special datum, the RELEASE PROBLEM of having avoided true benchmark and coordinate transformation parameter are obtained in realization.By this system, subscriber software-hardware, use habit are not made under the situation of any change, realized obtaining in real time the Gaussian plane rectangular coordinate of special datum, simultaneously under the model case of refining in conjunction with the earth level, can also directly obtain the elevation of institute measuring point position, improve user's operating efficiency greatly, can be widely used in fields such as mapping, precision navigation.
Claims (1)
1. method of obtaining the coordinate of certain special datum in real time based on the CORS system is characterized in that:
1), an intermediate server is set between CORS server and mobile radio station, and set up the transform data storehouse at intermediate server; According to positioning accuracy request, under the WGS84 benchmark, selected geographical space is divided into some cubes, adopt seven parametric methods to calculate each cubical 8 summit P respectively
I-8The coordinate D of corresponding certain special datum I
1-8,With the pseudo-benchmark I that is complementary with certain special datum I ' coordinate D '
1-8: promptly
（⊿X，⊿Y，⊿Z）
1-8=?D?
1-8（X
I，Y
I，Z
I）-?D′
?1-8（X
I′，Y
?I′，Z
?I′）
In the formula:
P
I-8It is the WGS84 benchmark on eight summits of a cube;
D
I-8(X
I, Y
I, Z
I) be the rectangular space coordinate of certain special datum I on eight summits of same cube;
D '
1-8(X
I', Y
I', Z
I') the pseudo-benchmark I that is complementary for eight summits of same cube and certain special datum I ' rectangular space coordinate;
(⊿ X ， ⊿ Y ， ⊿ Z)
1-8Rectangular space coordinate relatively poor for certain special datum and the pseudo-benchmark that matches;
Set up certain corresponding with it special datum of all cube summits in the WGS84 benchmark, and and the pseudo-benchmark that is complementary of special datum between rectangular space coordinate relatively poor, and with all being stored in the transform data storehouse than difference; Cube is divided more little, and its corresponding precision is high more;
2), mobile radio station sends the general location NMEA of user's request and WGS84 benchmark to intermediate server by GPRS or CDMA communication, intermediate server directly is transmitted to the CORS server with user's request and general location NMEA, the CORS server is according to general location NMEA, generate differential correcting VRS information A, and send to intermediate server;
When middle server receives the differential correcting VRS information of CORS server generation, extract the virtual reference station coordinates P(X that comprises in this differential correcting VRS information A
84, Y
84, Z
84), determine this coordinate P(X then
84, Y
84, Z
84) fall into above-mentioned certain cube, retrieve again each summit of this cube 8 of above-mentioned transform data library storage than difference, 8 adopt the arithmetic average method to calculate this and virtual reference station coordinates P this than difference
84(X
84, Y
84, Z
84) certain special datum I pseudo-transformation of criterion amount E(⊿ X ， ⊿ Y ， ⊿ Z that is complementary with it); The formula of arithmetic average method is as follows:
In the formula: E (⊿ X), E (⊿ Y), E (⊿ Z) be respectively the component of converted quantity E in rectangular coordinate system in space;
With this converted quantity E(⊿ X, ⊿ Y, ⊿ Z) with the virtual reference station coordinates P(X that extracts
84, Y
84, Z
84) add, subtract, multiplication and division or mix arithmetical operation after, generate new virtual reference station coordinates P ' (X
84', Y
84', Z
84') write back in the VRS information A, make the VRS information A change into VRS information B, utilize GPRS or CDMA communication that described VRS information B is sent to mobile radio station again and carry out Difference Calculation, thereby make mobile radio station can not obtain the coordinate of true WGS84 benchmark;
3), at the pseudo-benchmark of thin configuration one cover of mobile radio station hand, comprise central meridian, reference ellipsoid major radius, ellipticity, origin, be provided with simultaneously Coordinate Conversion seven parameters C that are complementary with it (
,
,
,
,
,
, m), utilize the husky model of boolean, dynamically realize the Coordinate Conversion of WGS84 and corresponding pseudo-benchmark, boolean's sand model formation is as follows:
In the formula: X
84', Y
84', Z
84' be the rectangular space coordinate of the WGS84 benchmark among the VRS information B; X, Y, Z are the rectangular space coordinate of pseudo-benchmark
M: scale parameter
Above-mentioned seven parameters are no less than 3 same places by utilization, adopt least square method to calculate;
By above setting, the mobile terminal just obtain in real time pseudo-benchmark rectangular space coordinate (X, Y, Z), utilize the gauss projection method calculate Gauss plane coordinate (x, y, h) and show;
Described special datum comprises national 54 coordinates, national 80 coordinates or local coordinate basis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110154844 CN102223709B (en) | 2011-06-10 | 2011-06-10 | Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110154844 CN102223709B (en) | 2011-06-10 | 2011-06-10 | Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102223709A true CN102223709A (en) | 2011-10-19 |
| CN102223709B CN102223709B (en) | 2013-08-14 |
Family
ID=44780100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110154844 Active CN102223709B (en) | 2011-06-10 | 2011-06-10 | Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102223709B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293541A (en) * | 2013-05-08 | 2013-09-11 | 武汉大学 | Method based on NTRIP for measuring RTD of arbitrary coordinate system result |
| CN103389080A (en) * | 2013-08-19 | 2013-11-13 | 重庆市地理信息中心 | Method for obtaining independent city coordinate system parameter based on geographic information application |
| CN103645490A (en) * | 2013-12-28 | 2014-03-19 | 淮海工学院 | Method for monitoring attitude of continuous operating reference station (CORS) of global navigation satellite system (GNSS) |
| CN104297770A (en) * | 2014-09-18 | 2015-01-21 | 广州中海达卫星导航技术股份有限公司 | Satellite positioning coordinate confidentiality conversion method and system |
| CN106969748A (en) * | 2016-01-13 | 2017-07-21 | 辽宁省水文局 | The field operation measuring method of mountain flood research and appraisal |
| CN111447551A (en) * | 2020-03-24 | 2020-07-24 | 广东星舆科技有限公司 | VRS data acquisition method, interaction method and terminal equipment position determination method |
| CN117708960A (en) * | 2024-02-04 | 2024-03-15 | 武汉大学 | Real-time conversion method, device, equipment and medium for plane coordinates and normal height |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441075A (en) * | 2008-12-04 | 2009-05-27 | 上海交通大学 | Map projection method using remote sense map tool |
| CN102043156A (en) * | 2009-10-13 | 2011-05-04 | 中铁二局股份有限公司 | Adjustment processing method for measuring two-dimensional baseline vector network by GPS (Global Position System) |
-
2011
- 2011-06-10 CN CN 201110154844 patent/CN102223709B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441075A (en) * | 2008-12-04 | 2009-05-27 | 上海交通大学 | Map projection method using remote sense map tool |
| CN102043156A (en) * | 2009-10-13 | 2011-05-04 | 中铁二局股份有限公司 | Adjustment processing method for measuring two-dimensional baseline vector network by GPS (Global Position System) |
Non-Patent Citations (1)
| Title |
|---|
| 张黎,蒲德祥,夏定辉,高翔,周玉清: "CORS系统实时地方坐标测量的保密模式研究", 《城市勘测》, 31 August 2010 (2010-08-31) * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293541A (en) * | 2013-05-08 | 2013-09-11 | 武汉大学 | Method based on NTRIP for measuring RTD of arbitrary coordinate system result |
| CN103389080A (en) * | 2013-08-19 | 2013-11-13 | 重庆市地理信息中心 | Method for obtaining independent city coordinate system parameter based on geographic information application |
| CN103389080B (en) * | 2013-08-19 | 2015-08-05 | 重庆市地理信息中心 | A kind of based on geographic information application Urban Independent Coordinate System parameter acquiring method |
| CN103645490A (en) * | 2013-12-28 | 2014-03-19 | 淮海工学院 | Method for monitoring attitude of continuous operating reference station (CORS) of global navigation satellite system (GNSS) |
| CN104297770A (en) * | 2014-09-18 | 2015-01-21 | 广州中海达卫星导航技术股份有限公司 | Satellite positioning coordinate confidentiality conversion method and system |
| CN104297770B (en) * | 2014-09-18 | 2016-08-24 | 广州中海达卫星导航技术股份有限公司 | Satellite positioning coordinate secrecy conversion method and system |
| CN106969748A (en) * | 2016-01-13 | 2017-07-21 | 辽宁省水文局 | The field operation measuring method of mountain flood research and appraisal |
| CN106969748B (en) * | 2016-01-13 | 2019-03-22 | 辽宁省水文局 | The field operation measurement method of mountain flood research and appraisal |
| CN111447551A (en) * | 2020-03-24 | 2020-07-24 | 广东星舆科技有限公司 | VRS data acquisition method, interaction method and terminal equipment position determination method |
| CN117708960A (en) * | 2024-02-04 | 2024-03-15 | 武汉大学 | Real-time conversion method, device, equipment and medium for plane coordinates and normal height |
| CN117708960B (en) * | 2024-02-04 | 2024-05-03 | 武汉大学 | Real-time conversion method, device, equipment and medium for plane coordinates and normal height |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102223709B (en) | 2013-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102223709B (en) | Method for acquiring specific reference Gaussian plane rectangular coordinate based on continuous operational reference system (CORS) in real time | |
| CN105334524B (en) | A kind of pseudo range difference localization method based on virtual grid | |
| CN109670005B (en) | Position matching method of BIM (building information modeling) model and three-dimensional geographic scene | |
| CN103389080B (en) | A kind of based on geographic information application Urban Independent Coordinate System parameter acquiring method | |
| CN101975578B (en) | Navigation method and device | |
| CN102928860B (en) | Method for improving GPS (Global Positioning System) positioning precision on the basis of local positioning information | |
| WO2019072092A1 (en) | Ip address positioning method and apparatus, electronic device, and storage medium | |
| CN204142233U (en) | A kind of intelligent land area measuring device | |
| CN107976702A (en) | A kind of position correcting method based on CORS, positioning terminal and alignment system | |
| CN110426723A (en) | A kind of method of the acquisition and map publishing of satellite positioning GGA data | |
| CN104123695A (en) | Method for realizing coordinate conversion | |
| CN105300373A (en) | Three-dimensional coordinate conversion method and device | |
| CN101441075B (en) | Map projection method using remote sense map tool | |
| CN103235319B (en) | Network RTK (Real-Time Kinematic) positioning method for obtaining coordinate and normal height of reference-ellipsoid-centric coordinate system in real time | |
| CN105300374A (en) | Three-dimensional coordinate conversion method and system | |
| CN103293541B (en) | Method based on NTRIP for measuring RTD of arbitrary coordinate system result | |
| CN105516251A (en) | Positioning calibration method and position service pushing system thereof | |
| CN108375778A (en) | A kind of methods of exhibiting and device of GPS positioning deception | |
| CN105957144A (en) | Three-dimensional game map display method and three-dimensional game map display system | |
| CN103675763B (en) | A kind of based on hardware-accelerated vector quantization VTS radar video rendering method | |
| CN108458708A (en) | A kind of Asset localization method and system | |
| CN102831180A (en) | Equipment and method for converting space references of land supervision data | |
| CN103996991B (en) | Selection method and system for transmission line of electricity | |
| CN106679617A (en) | Method for positioning horizontal position and height of floor | |
| CN107066606B (en) | KEY value calculation method and device based on recorder management platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 400020 Jiangbei District, Chongqing electric measuring Village No. 231 Patentee after: Chongqing geographic information and Remote Sensing Application Center (Chongqing surveying and mapping product quality inspection and testing center) Address before: The 401121 northern New District of Chongqing Municipality Neptune technology building D block 8 Building Patentee before: Chongqing Geographical Information Center |
|
| CP03 | Change of name, title or address |