CN113701722B - Three-dimensional oblique photogrammetry system for surveying - Google Patents

Abstract

The invention discloses a three-dimensional oblique photogrammetry system for surveying, which relates to the technical field of oblique photogrammetry and solves the technical problem that the feasibility analysis cannot be carried out on a surveying area in the prior art so as to cause the reduction of the surveying efficiency; the cost performance of the flight route is judged and measured, equipment faults caused by the flight route are reduced, and the accuracy of measurement is improved; the accuracy of measuring and constructing the three-dimensional model is judged, the low measuring accuracy is prevented, the measuring times are increased, the accident risk is increased, and the measuring cost is increased; the flight device for real-time measurement is reasonably allocated, the measurement accuracy is improved, and the problem that the measurement efficiency is reduced due to inaccurate measurement and incapability of timely adjustment is avoided.

Description

Three-dimensional oblique photogrammetry system for surveying

Technical Field

The invention relates to the technical field of oblique photogrammetry, in particular to a three-dimensional oblique photogrammetry system for surveying.

Background

The oblique photography technology is a high and new technology developed in the international surveying and mapping field in recent years, which overturns the limitation that the prior orthoimage can only be shot from a vertical angle, a plurality of sensors are carried on the same flight platform, and images are simultaneously collected from five different angles, namely a vertical angle, four oblique angles and the like, so that a real and intuitive world which accords with human vision is introduced into a user, the aerial oblique image can truly reflect the situation of ground objects, and the application field of the remote sensing image is greatly expanded by adopting an advanced positioning technology, embedding accurate geographic information, richer image information and more advanced user experience, and the industrial application of the remote sensing image is deeper;

however, in the prior art, feasibility analysis cannot be performed on a measurement area, photogrammetry cannot be performed on the area which cannot be photogrammetry, so that the measurement efficiency is reduced, and meanwhile, the course in each area cannot be analyzed, so that the accident rate of measurement equipment is increased, the measurement cost is increased, and the measurement efficiency is indirectly reduced; in addition, the precision of the real-time measuring equipment cannot be tested, and meanwhile, the measuring equipment cannot be adjusted in real time, so that the measuring quality is reduced, and the numerical accuracy is not high;

a solution is now proposed to address the technical drawback in this respect.

Disclosure of Invention

The invention aims to provide a three-dimensional oblique photogrammetry system for surveying, which judges whether each sub-region is suitable for oblique photogrammetry or not through environment analysis, and prevents the increase of the damage rate of oblique photogrammetry flight equipment caused by the unsuitable measurement of the environment in the sub-region, which causes the rise of the measurement cost and influences the measurement progress of a surveying region; the cost performance of the flight route is judged and measured, equipment faults caused by the flight route are reduced, and the accuracy of measurement is improved; the accuracy of measuring and constructing the three-dimensional model is judged, the low measuring accuracy is prevented, the measuring times are increased, the accident risk is increased, and the measuring cost is increased; the flight device for real-time measurement is reasonably allocated, the measurement accuracy is improved, and the problem that the measurement efficiency is reduced due to inaccurate measurement and incapability of timely adjustment is avoided.

The purpose of the invention can be realized by the following technical scheme:

a three-dimensional oblique photogrammetry system for surveying comprises an oblique photogrammetry platform, wherein a server and a processor are arranged in the oblique photogrammetry platform; the server is in bidirectional communication connection with an area analysis unit, an equipment analysis unit and a route analysis unit; the processor is in bidirectional communication connection with a measurement auditing unit and an accurate adapting unit;

the method comprises the steps that a server collects a region to be surveyed, divides the region to be surveyed into i sub-regions, wherein i is a natural number larger than 1, and then sends the i sub-regions to a region analysis unit; performing environment analysis on the sub-regions through a region analysis unit, judging whether each sub-region is suitable for oblique photogrammetry, dividing each sub-region into a non-oblique photogrammetry region and an oblique photogrammetry region, and sending the non-oblique photogrammetry region and the oblique photogrammetry region to a server;

after receiving the non-oblique photogrammetry region and the oblique photogrammetry region, the server generates a route analysis signal and sends the route analysis signal to a route analysis unit; analyzing the air routes of each sub-area through an air route analyzing unit, dividing the measured air route into a fixed air route and a temporary air route, and sending the fixed air route and the temporary air route to a server;

after receiving the fixed route and the temporary route, the server generates an equipment analysis signal and sends the equipment analysis signal to an equipment analysis unit; analyzing the measured flying equipment through an equipment analysis unit, and grading the measured flying equipment;

the processor generates a measurement auditing signal and sends the measurement auditing signal to the measurement auditing unit; performing quality analysis on the oblique image pickup measurement through a measurement auditing unit, and passing the oblique image pickup measurement; and the accurate adaptation unit reasonably allocates the flight equipment for real-time measurement.

Further, the analysis process of the area analysis unit is as follows:

collecting the intensity difference of the layered air flow above each sub-area, and respectively marking the intensity difference of the layered air flow above each sub-area as QLi; collecting the crosswind frequency and the crosswind average intensity generated above each subregion, and respectively marking the crosswind frequency and the crosswind average intensity generated above each subregion as PLi and QDi; obtaining measurement analysis coefficients Xi in each sub-area through analysis, and comparing the measurement analysis coefficients Xi in each sub-area with a measurement analysis coefficient threshold value: if the measurement analysis coefficient Xi in the sub-area is larger than or equal to the measurement analysis coefficient threshold, judging that the corresponding sub-area is not suitable for flying, and marking the corresponding sub-area as a non-oblique photogrammetric area; if the measurement analysis coefficient Xi in the sub-region is smaller than the measurement analysis coefficient threshold value, judging that the corresponding sub-region is suitable for flying, and marking the corresponding sub-region as a tilted photogrammetric region; the non-oblique photogrammetry region and the oblique photogrammetry region are transmitted to a server together.

Further, the analysis process of the route analysis unit is as follows:

marking the oblique photogrammetry region as a measurement region according to the non-oblique photogrammetry region and the oblique photogrammetry region, marking the non-oblique photogrammetry region as a non-measurement region, and setting a measurement route according to the measurement region and the non-measurement region; acquiring the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas, and marking the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas as BZo; collecting the number of the route intersections existing in each measuring route, and marking the number of the route intersections existing in each measuring route as HSo; acquiring accident rates of all measuring air routes, and marking the accident rates of all measuring air routes as SGo;

obtaining a set analysis coefficient Zo of each route through analysis, and comparing the set analysis coefficient Zo of each route with a set analysis coefficient threshold value: if the set analysis coefficient Zo of the route is not less than the set analysis coefficient threshold, judging that the corresponding route is qualified, and marking the corresponding route as a fixed route; if the set analysis coefficient Zo of the route is less than the set analysis coefficient threshold, judging that the corresponding route is unqualified, and marking the corresponding route as a temporary route; and sending the fixed route and the temporary route to a server.

Further, the analysis process of the device analysis unit is as follows:

collecting the trip frequency and the normal completion rate of the flight equipment, and comparing the trip frequency and the normal completion rate of the flight equipment with a trip frequency threshold value and a normal completion rate threshold value respectively: if the trip frequency of the flying equipment is more than or equal to the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as primary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as secondary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is less than the normal completion rate threshold value, marking the corresponding flying equipment as three-level measuring equipment; and sending the primary measuring equipment, the secondary measuring equipment and the tertiary measuring equipment to a server.

Further, the analysis and audit process of the measurement and audit unit is as follows:

setting five measurement visual angles of the flight equipment for oblique photogrammetry, wherein the five measurement visual angles are a vertical visual angle and an oblique visual angle around the vertical visual angle respectively; collecting the measurement area of each measurement visual angle, randomly selecting u monitoring points in each measurement area, collecting the longitude and latitude of each monitoring point, and marking the longitude and latitude as the measurement longitude and latitude, wherein u is a natural number more than 1; acquiring actual survey longitude and latitude of each monitoring point according to actual site survey, acquiring a longitude and latitude difference value by measuring the longitude and latitude and the actual survey longitude and latitude, and marking the used longitude and latitude difference value as WDC; collecting the corresponding measurement area of the measurement area of each measurement visual angle, comparing the measurement area with the actual floor area of each measurement area, collecting the area difference of each measurement area, and marking the area difference as MCZ; obtaining an analysis auditing coefficient SH corresponding to the measurement through analysis;

comparing the correspondingly measured analysis audit coefficient SH with an analysis audit coefficient threshold: if the analysis and audit coefficient SH corresponding to the measurement is larger than or equal to the analysis and audit coefficient threshold value, judging that the corresponding measurement and audit is not passed, generating a measurement precision abnormal signal and sending the measurement precision abnormal signal to the processor; and if the analysis auditing coefficient SH of the corresponding measurement is less than the analysis auditing coefficient threshold value, judging that the corresponding measurement auditing is passed, generating a normal measurement precision signal and sending the normal measurement precision signal to the processor.

Further, the fitting process of the precise adaptation unit is as follows:

acquiring the position of a corresponding area where the flight equipment is located and measured in real time, marking the corresponding position as a debugging position, and if the rest fixed air routes and the temporary air route approach debugging position, adjusting the corresponding air route; acquiring a measurement area corresponding to the vertical visual angle of the flight equipment, and reducing the shooting jitter frequency of the flight equipment if the precision of the corresponding measurement area is abnormal; acquiring a measurement area corresponding to the inclined view angle of the flight equipment, and reducing the angle corresponding to the inclined view angle if the precision of the corresponding measurement area is abnormal;

and if the precision of the real-time measurement cannot be adjusted, replacing the corresponding flying equipment model.

Compared with the prior art, the invention has the beneficial effects that:

according to the method, whether each sub-region is suitable for oblique photogrammetry or not is judged through environment analysis, so that the situation that the environment in the sub-region is not suitable for measurement, the damage rate of oblique photogrammetry flight equipment is improved, the measurement cost is increased, and the measurement progress of a survey region is influenced is prevented; the cost performance of the flight route is judged and measured, equipment faults caused by the flight route are reduced, and the accuracy of measurement is improved;

the accuracy of measuring and constructing the three-dimensional model is judged, the low measuring accuracy is prevented, the measuring times are increased, the accident risk is increased, and the measuring cost is increased; accuracy monitoring is carried out through the longitude and latitude difference value and the area difference value, accuracy of large-range measurement and accurate measurement can be embodied, measurement quality is embodied from two extreme aspects, and accuracy of measurement accuracy auditing is improved; the flight device for real-time measurement is reasonably allocated, the measurement accuracy is improved, and the problem that the measurement efficiency is reduced due to inaccurate measurement and incapability of timely adjustment is avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of the present invention.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.

As shown in fig. 1, a three-dimensional oblique photogrammetry system for surveying comprises an oblique photogrammetry platform, wherein a server and a processor are arranged in the oblique photogrammetry platform, the server is in bidirectional communication connection with the processor, and the server is in bidirectional communication connection with an area analysis unit, an equipment analysis unit and a route analysis unit; the processor is in bidirectional communication connection with a measurement auditing unit and an accurate adapting unit;

the method comprises the steps that a server collects a region to be surveyed, divides the region to be surveyed into i sub-regions, wherein i is a natural number larger than 1, and then sends the i sub-regions to a region analysis unit; after the area analysis unit receives i subregions, carry out environmental analysis to the subregion, judge through environmental analysis whether each subregion is fit for carrying out oblique photogrammetry, prevent that the unsuitable measurement of subregion internal environment from leading to oblique photogrammetry flight equipment's spoilage to improve, cause the measurement cost to rise, influenced the regional measurement progress of surveying simultaneously, concrete analytic process is as follows:

step S1: collecting the intensity difference of the layered air flow above each sub-area, and respectively marking the intensity difference of the layered air flow above each sub-area as QLi; the layered airflow intensity difference is expressed as a difference value caused by different airflow intensities at different heights above the region, is an important influence factor of the flying equipment in taking off and landing and height adjustment flight, and is easy to cause the stability of the flying equipment in taking off and landing and height adjustment flight if the layered airflow intensity difference is too large, so that the flying equipment can be damaged and crashed seriously;

step S2: collecting the crosswind frequency and the crosswind average intensity generated above each subregion, and respectively marking the crosswind frequency and the crosswind average intensity generated above each subregion as PLi and QDi; in the application, the cross wind frequency and the cross wind average intensity are influence factors of flight at the set height of the flight equipment, and the stability of flight at the set height can be influenced by overlarge cross wind intensity, and meanwhile, the direction of the flight equipment is easily disordered, so that the measurement efficiency is reduced;

step S3: by the formula

Obtaining measurement analysis coefficients Xi in each subregion, wherein a1, a2 and a3 are all preset proportionality coefficients, a1 is larger than a2 and is larger than a3 and is larger than 0, and the measurement analysis coefficients are obtained by normalizing parameters of each subregion to obtain a feasibility numerical value for evaluating the flight of the flight equipment in the subregion; the higher the layered airflow intensity difference, the crosswind frequency and the crosswind average intensity are obtained through a formula, the higher the measurement analysis coefficient is, and the lower the feasibility of flying equipment in the corresponding sub-area is represented;

step S4: comparing the measurement analysis coefficient Xi in each sub-area with a measurement analysis coefficient threshold value: if the measurement analysis coefficient Xi in the sub-area is larger than or equal to the measurement analysis coefficient threshold, judging that the corresponding sub-area is not suitable for flying, and marking the corresponding sub-area as a non-oblique photogrammetric area; if the measurement analysis coefficient Xi in the sub-region is smaller than the measurement analysis coefficient threshold value, judging that the corresponding sub-region is suitable for flying, and marking the corresponding sub-region as a tilted photogrammetric region;

sending the non-oblique photogrammetry region and the oblique photogrammetry region to a server together;

the server generates a flight line analysis signal and sends the flight line analysis signal to a flight line analysis unit after receiving the non-oblique photogrammetry area and the oblique photogrammetry area, the flight line analysis unit is used for analyzing the flight lines of each sub-area, judging and measuring the cost performance of flight lines, reducing equipment faults caused by the flight lines, and improving the accuracy of measurement, and the specific analysis process is as follows:

step SS 1: marking the oblique photogrammetry region as a measurement region according to the non-oblique photogrammetry region and the oblique photogrammetry region, marking the non-oblique photogrammetry region as a non-measurement region, setting a measurement route according to the measurement region and the non-measurement region, and marking the measurement route as o, wherein o is a natural number greater than 1;

step SS 2: acquiring the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas, and marking the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas as BZo; collecting the number of the route intersections existing in each measuring route, and marking the number of the route intersections existing in each measuring route as HSo; the intersection points of the route influence the timeliness of the flight equipment, and if the number of the intersection points of the route is too large and the corresponding route needs to be measured temporarily, the collision of the flight equipment is easily caused, and the measurement efficiency is reduced; acquiring accident rates of all measuring air routes, and marking the accident rates of all measuring air routes as SGo;

step SS 3: by the formula

Acquiring a set analysis coefficient Zo of each route, wherein b1, b2 and b3 are preset proportional coefficients, b1 is larger than b2 is larger than b3 is larger than 0, beta is an error correction factor and takes a value of 1.036, and the set analysis coefficient is a numerical value for evaluating the set efficiency of each route by carrying out normalization processing on parameters of each route; the larger the number of the intersection points of the routes and the accident rate of the measured routes are obtained through a formula, the larger the set analysis coefficient is, and the lower the set efficiency of the corresponding route is represented;

step SS 4: comparing the set analysis coefficient Zo of each route with a set analysis coefficient threshold value: if the set analysis coefficient Zo of the route is not less than the set analysis coefficient threshold, judging that the corresponding route is qualified, and marking the corresponding route as a fixed route; if the set analysis coefficient Zo of the route is less than the set analysis coefficient threshold, judging that the corresponding route is unqualified, and marking the corresponding route as a temporary route; the fixed route is a route used for daily measurement, and the temporary route is a route temporarily adopted when the fixed route cannot be adopted under an emergency condition;

sending the fixed route and the temporary route to a server;

after the server receives the fixed route and the temporary route, generating an equipment analysis signal and sending the equipment analysis signal to an equipment analysis unit, wherein the equipment analysis unit is used for analyzing the measured flight equipment and preventing the measurement progress delay caused by the faults of the flight equipment, and the specific analysis process is as follows:

collecting the trip frequency and the normal completion rate of the flight equipment, and comparing the trip frequency and the normal completion rate of the flight equipment with a trip frequency threshold value and a normal completion rate threshold value respectively: if the trip frequency of the flying equipment is more than or equal to the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as primary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as secondary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is less than the normal completion rate threshold value, marking the corresponding flying equipment as three-level measuring equipment; in the application, the primary measuring equipment, the secondary measuring equipment and the tertiary measuring equipment are all grades representing the running state of the flight equipment;

sending the primary measuring equipment, the secondary measuring equipment and the tertiary measuring equipment to a server;

after determining the course and the equipment, the server sends the selected course, the selected equipment and the oblique photogrammetry area to the processor; the processor generates a measurement auditing signal and sends the measurement auditing signal to the measurement auditing unit, the measurement auditing unit is used for performing quality analysis on the oblique image pickup measurement, judging the accuracy of measuring and constructing a three-dimensional model, preventing the measurement accuracy from being low, increasing the measurement times, increasing the accident risk and increasing the measurement cost, and the specific analysis auditing process is as follows:

setting five measurement visual angles of the flight equipment for oblique photogrammetry, wherein the five measurement visual angles are a vertical visual angle and an oblique visual angle around the vertical visual angle respectively; wherein the oblique viewing angles are an east oblique viewing angle, a west oblique viewing angle, a south oblique viewing angle and a north oblique viewing angle;

collecting the measurement area of each measurement visual angle, randomly selecting u monitoring points in each measurement area, collecting the longitude and latitude of each monitoring point, and marking the longitude and latitude as the measurement longitude and latitude, wherein u is a natural number more than 1; acquiring actual survey longitude and latitude of each monitoring point according to actual site survey, acquiring a longitude and latitude difference value by measuring the longitude and latitude and the actual survey longitude and latitude, and marking the used longitude and latitude difference value as WDC; the longitude and latitude difference value is marked as the sum of the numerical difference values of the measured longitude and the measured latitude of the monitoring point and the actual survey longitude and the actual survey latitude respectively, and is only calculated for the corresponding numerical value;

collecting the corresponding measurement area of the measurement area of each measurement visual angle, comparing the measurement area with the actual floor area of each measurement area, collecting the area difference of each measurement area, and marking the area difference as MCZ; obtaining an analysis auditing coefficient SH corresponding to measurement through a formula SH ═ alpha (WDC × d1+ MCZ × d2), wherein d1 and d2 are both preset proportionality coefficients, d1 is more than d2 is more than 0, and alpha is an error correction factor and takes the value of 2.012;

comparing the correspondingly measured analysis audit coefficient SH with an analysis audit coefficient threshold: if the analysis and audit coefficient SH corresponding to the measurement is larger than or equal to the analysis and audit coefficient threshold value, judging that the corresponding measurement and audit is not passed, generating a measurement precision abnormal signal and sending the measurement precision abnormal signal to the processor; if the analysis auditing coefficient SH of the corresponding measurement is smaller than the analysis auditing coefficient threshold value, judging that the corresponding measurement auditing is passed, generating a normal measurement precision signal and sending the normal measurement precision signal to the processor; accuracy monitoring is carried out through the longitude and latitude difference value and the area difference value, accuracy of large-range measurement and accurate measurement can be embodied, measurement quality is embodied from two extreme aspects, and accuracy of measurement accuracy auditing is improved;

the processor generates a precise adaptation instruction after receiving the measurement precision abnormal signal and sends the precise adaptation instruction to the precise adaptation unit; accurate adaptation unit receives accurate adaptation instruction after, carries out reasonable allotment to real-time measurement's flight equipment, improves and measures accurate nature, avoids measuring inaccurate and unable adjustment in time, causes measurement of efficiency to reduce, and concrete allotment process is as follows:

acquiring the position of a corresponding area where the flight equipment is located and measured in real time, marking the corresponding position as a debugging position, and if the rest fixed air routes and the temporary air route approach debugging position, adjusting the corresponding air route; acquiring a measurement area corresponding to the vertical visual angle of the flight equipment, and reducing the shooting jitter frequency of the flight equipment if the precision of the corresponding measurement area is abnormal; acquiring a measurement area corresponding to the inclined view angle of the flight equipment, and reducing the angle corresponding to the inclined view angle if the precision of the corresponding measurement area is abnormal;

and if the precision of the real-time measurement cannot be adjusted, replacing the corresponding flying equipment model.

A survey three-dimensional oblique photogrammetry system, while working, carry on the environmental analysis to the subregion through the area analysis unit, judge whether each subregion is suitable for carrying on the oblique photogrammetry, and divide each subregion into not oblique photogrammetry area and oblique photogrammetry area, send the non-oblique photogrammetry area and oblique photogrammetry area to the server at the same time; after receiving the non-oblique photogrammetry region and the oblique photogrammetry region, the server generates a route analysis signal and sends the route analysis signal to a route analysis unit; analyzing the air routes of each sub-area through an air route analyzing unit, dividing the measured air route into a fixed air route and a temporary air route, and sending the fixed air route and the temporary air route to a server; after receiving the fixed route and the temporary route, the server generates an equipment analysis signal and sends the equipment analysis signal to an equipment analysis unit; analyzing the measured flying equipment through an equipment analysis unit, and grading the measured flying equipment; the processor generates a measurement auditing signal and sends the measurement auditing signal to the measurement auditing unit; performing quality analysis on the oblique image pickup measurement through a measurement auditing unit, and passing the oblique image pickup measurement; and the accurate adaptation unit reasonably allocates the flight equipment for real-time measurement.

The above formulas are all calculated by taking the numerical value of the dimension, the formula is a formula which obtains the latest real situation by acquiring a large amount of data and performing software simulation, and the preset parameters in the formula are set by the technical personnel in the field according to the actual situation.

The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.

Claims (6)

1. A three-dimensional oblique photogrammetry system for surveying is characterized by comprising an oblique photogrammetry platform, wherein a server and a processor are arranged in the oblique photogrammetry platform; the server is in bidirectional communication connection with an area analysis unit, an equipment analysis unit and a route analysis unit; the processor is in bidirectional communication connection with a measurement auditing unit and an accurate adapting unit;

the method comprises the steps that a server collects a region to be surveyed, divides the region to be surveyed into i sub-regions, wherein i is a natural number larger than 1, and then sends the i sub-regions to a region analysis unit; performing environment analysis on the sub-regions through a region analysis unit, judging whether each sub-region is suitable for oblique photogrammetry, dividing each sub-region into a non-oblique photogrammetry region and an oblique photogrammetry region, and sending the non-oblique photogrammetry region and the oblique photogrammetry region to a server;

after receiving the non-oblique photogrammetry region and the oblique photogrammetry region, the server generates a route analysis signal and sends the route analysis signal to a route analysis unit; analyzing the air routes of each sub-area through an air route analyzing unit, dividing the measured air route into a fixed air route and a temporary air route, and sending the fixed air route and the temporary air route to a server;

after receiving the fixed route and the temporary route, the server generates an equipment analysis signal and sends the equipment analysis signal to an equipment analysis unit; analyzing the measured flying equipment through an equipment analysis unit, and grading the measured flying equipment;

the processor generates a measurement auditing signal and sends the measurement auditing signal to the measurement auditing unit; the quality analysis is carried out on the oblique shooting measurement through the measurement auditing unit, and the flight equipment for real-time measurement is reasonably allocated through the accurate adapting unit.

2. The surveying three-dimensional oblique photogrammetry system according to claim 1, wherein the analysis process of the area analysis unit is as follows:

collecting the intensity difference of the layered air flow above each sub-area, and respectively marking the intensity difference of the layered air flow above each sub-area as QLi; collecting the crosswind frequency and the crosswind average intensity generated above each subregion, and respectively marking the crosswind frequency and the crosswind average intensity generated above each subregion as PLi and QDi; by the formula

Obtaining measurement analysis coefficients Xi in each subregion, wherein a1, a2 and a3 are all preset proportionality coefficients, and a1 is larger than a2 and a3 is larger than 0; comparing the measurement analysis coefficient Xi in each sub-area with a measurement analysis coefficient threshold value: if the measurement analysis coefficient Xi in the sub-area is larger than or equal to the measurement analysis coefficient threshold, judging that the corresponding sub-area is not suitable for flying, and marking the corresponding sub-area as a non-oblique photogrammetric area; if the measurement analysis coefficient Xi in the sub-region is smaller than the measurement analysis coefficient threshold value, judging that the corresponding sub-region is suitable for flying, and marking the corresponding sub-region as a tilted photogrammetric region; the non-oblique photogrammetry region and the oblique photogrammetry region are transmitted to a server together.

3. The surveying three-dimensional oblique photogrammetry system according to claim 1, wherein the course analysis unit analyzes as follows:

marking the oblique photogrammetry region as a measurement region according to the non-oblique photogrammetry region and the oblique photogrammetry region, marking the non-oblique photogrammetry region as a non-measurement region, and setting a measurement route according to the measurement region and the non-measurement region; acquiring the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas, and marking the ratio of the number of passing non-measurement areas of each measurement route to the number of measurement areas as BZo; collecting the number of the route intersections existing in each measuring route, and marking the number of the route intersections existing in each measuring route as HSo; acquiring accident rates of all measuring air routes, and marking the accident rates of all measuring air routes as SGo;

obtaining a set analysis coefficient Zo of each route through analysis, and comparing the set analysis coefficient Zo of each route with a set analysis coefficient threshold value: if the set analysis coefficient Zo of the route is not less than the set analysis coefficient threshold, judging that the corresponding route is qualified, and marking the corresponding route as a fixed route; if the set analysis coefficient Zo of the route is less than the set analysis coefficient threshold, judging that the corresponding route is unqualified, and marking the corresponding route as a temporary route; and sending the fixed route and the temporary route to a server.

4. The surveying three-dimensional oblique photogrammetry system according to claim 1, characterized in that the analysis process of the equipment analysis unit is as follows:

collecting the trip frequency and the normal completion rate of the flight equipment, and comparing the trip frequency and the normal completion rate of the flight equipment with a trip frequency threshold value and a normal completion rate threshold value respectively: if the trip frequency of the flying equipment is more than or equal to the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as primary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is more than or equal to the normal completion rate threshold value, marking the corresponding flying equipment as secondary measuring equipment; if the trip frequency of the flying equipment is less than the trip frequency threshold value and the normal completion rate is less than the normal completion rate threshold value, marking the corresponding flying equipment as three-level measuring equipment; and sending the primary measuring equipment, the secondary measuring equipment and the tertiary measuring equipment to a server.

5. The surveying three-dimensional oblique photogrammetry system according to claim 1, wherein the analysis and audit process of the survey audit unit is as follows:

setting five measurement visual angles of the flight equipment for oblique photogrammetry, wherein the five measurement visual angles are a vertical visual angle and an oblique visual angle around the vertical visual angle respectively; collecting the measurement area of each measurement visual angle, randomly selecting u monitoring points in each measurement area, collecting the longitude and latitude of each monitoring point, and marking the longitude and latitude as the measurement longitude and latitude, wherein u is a natural number more than 1; acquiring actual survey longitude and latitude of each monitoring point according to actual site survey, acquiring a longitude and latitude difference value by measuring the longitude and latitude and the actual survey longitude and latitude, and marking the used longitude and latitude difference value as WDC; collecting the corresponding measurement area of the measurement area of each measurement visual angle, comparing the measurement area with the actual floor area of each measurement area, collecting the area difference of each measurement area, and marking the area difference as MCZ; obtaining an analysis auditing coefficient SH corresponding to the measurement through analysis;

comparing the correspondingly measured analysis audit coefficient SH with an analysis audit coefficient threshold: if the analysis and audit coefficient SH corresponding to the measurement is larger than or equal to the analysis and audit coefficient threshold value, judging that the corresponding measurement and audit is not passed, generating a measurement precision abnormal signal and sending the measurement precision abnormal signal to the processor; and if the analysis auditing coefficient SH of the corresponding measurement is less than the analysis auditing coefficient threshold value, judging that the corresponding measurement auditing is passed, generating a normal measurement precision signal and sending the normal measurement precision signal to the processor.

6. The surveying three-dimensional oblique photogrammetry system according to claim 1, wherein the fitting process of the precision fitting unit is as follows:

acquiring the position of a corresponding area where the flight equipment is located and measured in real time, marking the corresponding position as a debugging position, and if the rest fixed air routes and the temporary air route approach debugging position, adjusting the corresponding air route; acquiring a measurement area corresponding to the vertical visual angle of the flight equipment, and reducing the shooting jitter frequency of the flight equipment if the precision of the corresponding measurement area is abnormal; acquiring a measurement area corresponding to the inclined view angle of the flight equipment, and reducing the angle corresponding to the inclined view angle if the precision of the corresponding measurement area is abnormal;

and if the precision of the real-time measurement cannot be adjusted, replacing the corresponding flying equipment model.

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