CN114708397A - Ground three-dimensional model data processing method and system for photovoltaic system installation - Google Patents

Ground three-dimensional model data processing method and system for photovoltaic system installation Download PDF

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CN114708397A
CN114708397A CN202210627623.6A CN202210627623A CN114708397A CN 114708397 A CN114708397 A CN 114708397A CN 202210627623 A CN202210627623 A CN 202210627623A CN 114708397 A CN114708397 A CN 114708397A
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dimensional
coordinate
area
ground
points
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CN114708397B (en
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刘汪利
介雷
胡佳启
姚川朋
孔国寿
王建明
刘勇
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Yidao New Energy Technology Co ltd
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Das Solar Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/05—Geographic models
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G06T17/30—Polynomial surface description
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

The invention belongs to the technical field of three-dimensional ground modeling, and discloses a ground three-dimensional model data processing method for photovoltaic system installation, which comprises the steps of S1, establishing a three-dimensional coordinate system of a ground observed area, and acquiring coordinate values of an observation point on the ground on the three-dimensional coordinate system; s2, acquiring a two-dimensional electronic map corresponding to the observed area on the ground, establishing a plane coordinate system on the two-dimensional electronic map, and extracting coordinate values of coordinate points on the graphic outlines forming the highway area and the open area on the map; s3, based on the coordinate values of the coordinate points on the graphic outlines of the road area and the open area, searching three-dimensional coordinate points matched with the coordinate values on the three-dimensional coordinate system, and calculating the height values of the positions of the coordinate points on the graphic outlines of the road area and the open area; s4, generating a three-dimensional ground model by using a surface fitting algorithm, wherein the method for carrying out three-dimensional ground modeling has the advantages of simple and rapid modeling process and high modeling precision.

Description

Ground three-dimensional model data processing method and system for photovoltaic system installation
Technical Field
The invention belongs to the technical field of three-dimensional ground modeling, and particularly relates to a ground three-dimensional model data processing method and system for photovoltaic system installation.
Background
With the development of the space ranging technology and the three-dimensional modeling technology, more and more modeling requirements for the three-dimensional ground appear, and higher requirements are also provided for the accuracy of the three-dimensional ground modeling, particularly, when the photovoltaic system is installed, the influence of the ground height on the actual power generation amount of the photovoltaic system in use needs to be particularly noticed, the larger the result of the ground height plus the building height is, this means that the better the capacity of the photovoltaic system to receive solar radiation, i.e. the greater the actual power production of the photovoltaic system after installation, and, therefore, before the installation of the photovoltaic system, a three-dimensional ground model within the installation area should first be established, the method can be used for more accurately estimating the actual power generation amount of the photovoltaic system in use under the condition of fully considering the influence of the ground height on the solar radiation receiving capacity of the photovoltaic system.
Disclosure of Invention
In order to solve the technical problems, the invention provides a ground three-dimensional model data processing method for photovoltaic system installation, which aims to complete three-dimensional modeling of the ground in an installation area before the installation of a photovoltaic system so as to help select the installation position of the photovoltaic system and more accurately evaluate the actual power generation amount of the photovoltaic system in use.
In order to achieve the above object, the following method for processing data of a three-dimensional ground model for installing a photovoltaic system is provided, and specifically includes the following steps:
establishing a three-dimensional coordinate system on a ground observed area, equally dividing the ground observed area into square areas with the same size according to a preset observation interval value, selecting four vertexes of each square area as observation points on the ground observed area, and simultaneously obtaining coordinate values of each observation point on the three-dimensional coordinate system;
acquiring a two-dimensional electronic map corresponding to the observed area on the ground, establishing a plane coordinate system on the two-dimensional electronic map, extracting all coordinate points on the graphic outline of the road area and the open area on the two-dimensional electronic map, and acquiring coordinate values of the coordinate points on the plane coordinate system;
step three, based on the coordinate values of all coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map obtained in the step two, finding out the three-dimensional coordinate points matched with the coordinate points on the three-dimensional coordinate system in the step one, and further using the three-dimensional coordinate points to find out the three-dimensional coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map
Figure DEST_PATH_IMAGE001
Calculating the height value of the position of each coordinate point on the graphic profile of the highway area and the open area by the coordinate values on the coordinate axes;
finding out a three-dimensional coordinate point matched with the three-dimensional coordinate system on the three-dimensional coordinate system in the step one, wherein the method comprises the following steps:
first, determining the three-dimensional coordinate system in step one respectively
Figure 299374DEST_PATH_IMAGE002
Shaft and
Figure DEST_PATH_IMAGE003
unit scale on axis and plane coordinate system in step two
Figure 809990DEST_PATH_IMAGE004
Shaft and
Figure DEST_PATH_IMAGE005
proportional relation between unit scales on axis, and determining three-dimensional coordinate system in step one
Figure 792989DEST_PATH_IMAGE002
Positive direction of axis, and the plane coordinate system in step two
Figure 47253DEST_PATH_IMAGE006
The numerical value of the included angle between the positive directions of the axes;
secondly, based on the coordinate values of all coordinate points on the graph outline of the highway area and the open area obtained in the second step
Figure DEST_PATH_IMAGE007
，
Figure 330467DEST_PATH_IMAGE008
Calculating the corresponding coordinate point on the three-dimensional coordinate system in the step one by using a coordinate conversion formula
Figure DEST_PATH_IMAGE009
Shaft and
Figure 480825DEST_PATH_IMAGE010
coordinate values on the axis
Figure 482279DEST_PATH_IMAGE011
，
Figure 415600DEST_PATH_IMAGE008
The coordinate conversion formula is described as follows:
Figure 943534DEST_PATH_IMAGE012
wherein, in the step (A),
Figure 405739DEST_PATH_IMAGE013
，
Figure 894489DEST_PATH_IMAGE014
represents said
Figure 490556DEST_PATH_IMAGE009
Unit scale on axis relative to said
Figure 748362DEST_PATH_IMAGE006
The unit scale on the axis is expanded by a multiple of a value,
Figure 912627DEST_PATH_IMAGE015
，
Figure 750657DEST_PATH_IMAGE016
represents the same
Figure 760201DEST_PATH_IMAGE003
Unit scale on the shaft relative to the
Figure 138093DEST_PATH_IMAGE005
The unit scale on the axis is expanded by a multiple of a value,
Figure 66735DEST_PATH_IMAGE017
，
Figure 530077DEST_PATH_IMAGE018
represents said
Figure 343313DEST_PATH_IMAGE002
The positive direction of the axis with
Figure 575711DEST_PATH_IMAGE019
The numerical value of the included angle between the positive directions of the axes;
thirdly, judging the coordinate value
Figure 206412DEST_PATH_IMAGE020
And the observation point in the step one is
Figure 891471DEST_PATH_IMAGE002
Shaft and
Figure 242818DEST_PATH_IMAGE003
when the coordinate values on the axes are the same, taking the observation point as a three-dimensional coordinate point matched with the coordinate point on the figure outline of the highway area and the open space area in the step two on the three-dimensional coordinate system in the step one, and judging whether the coordinate value is the same
Figure 454357DEST_PATH_IMAGE011
And the observation point in the step one is
Figure 131326DEST_PATH_IMAGE002
Shaft and
Figure 303681DEST_PATH_IMAGE003
when the coordinate values on the axes are different, the coordinate values are obtained
Figure 317774DEST_PATH_IMAGE020
Taking the observation point which is closest to the observation point as a three-dimensional coordinate point which is matched with coordinate points on the graphic outlines of the highway area and the open area in the step two on the three-dimensional coordinate system in the step one;
and fourthly, generating a three-dimensional ground model by using a curved surface fitting algorithm according to coordinate values of coordinate points on a plane coordinate system and height values of positions of the coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map corresponding to the observed area of the ground.
Compared with the prior art, the invention has the following beneficial effects:
1. the method comprises the steps of firstly establishing a three-dimensional coordinate system of a ground observed area, obtaining coordinate values of observed points on the ground on the three-dimensional coordinate system, then obtaining a two-dimensional electronic map corresponding to the ground observed area, establishing a plane coordinate system on the two-dimensional electronic map, extracting coordinate values of coordinate points on graphic outlines forming a highway area and an open area on the map, then searching three-dimensional coordinate points matched with the coordinate points on the three-dimensional coordinate system on the basis of the coordinate values of the coordinate points on the graphic outlines of the highway area and the open area, calculating height values of the positions of the coordinate points on the graphic outlines of the highway area and the open area, and finally generating a three-dimensional ground model by using a surface fitting algorithm. When the method is used for three-dimensional ground modeling, the method has the advantages of simple and quick modeling process.
2. According to the invention, the ground positions of coordinate points on a road area and an open area which can represent the change of the height and depression state of the ground and the height values of the positions of the coordinate points are used, the modeling of the three-dimensional ground is completed before the photovoltaic system is installed, the installation position of the photovoltaic system can be selected, and the actual power generation amount of the photovoltaic system in use can be more accurately evaluated.
Drawings
FIG. 1 is a flow chart of the steps of a method for processing three-dimensional model data of a ground for installing a photovoltaic system according to the present invention;
FIG. 2 is a flowchart illustrating the steps of finding a matching three-dimensional coordinate point in a three-dimensional coordinate system according to the present invention;
fig. 3 is a composition structure diagram of a ground three-dimensional model data processing system for installing a photovoltaic system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms unless otherwise specified. These terms are only used to distinguish one element from another. For example, a first xx script may be referred to as a second xx script, and similarly, a second xx script may be referred to as a first xx script, without departing from the scope of the present application.
Referring to fig. 1, the invention provides a method for processing data of a three-dimensional ground model for installing a photovoltaic system, which is specifically realized by executing the following steps:
establishing a three-dimensional coordinate system on a ground observed area, equally dividing the ground observed area into square areas with the same size according to a preset observation interval value, selecting four vertexes of each square area as observation points on the ground observed area, and simultaneously obtaining coordinate values of each observation point on the three-dimensional coordinate system;
acquiring a two-dimensional electronic map corresponding to the observed area on the ground, establishing a plane coordinate system on the two-dimensional electronic map, extracting all coordinate points on the graphic outline of the road area and the open area on the two-dimensional electronic map, and acquiring coordinate values of the coordinate points on the plane coordinate system;
step three, based on the coordinate values of all coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map obtained in the step two, finding out the three-dimensional coordinate points matched with the coordinate points on the three-dimensional coordinate system in the step one, and further using the three-dimensional coordinate points to find out the three-dimensional coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map
Figure 524764DEST_PATH_IMAGE001
Calculating the height value of the position of each coordinate point on the graphic profile of the highway region and the open area by the coordinate values on the coordinate axes;
and fourthly, generating a three-dimensional ground model by using a curved surface fitting algorithm according to coordinate values of coordinate points on a plane coordinate system and height values of positions of the coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map corresponding to the observed area of the ground.
Further, the ground observed area in the first step specifically includes a building area, a road area and an open space area, and the process of acquiring the coordinate value of each observation point on the Z coordinate axis of the three-dimensional coordinate system in the first step specifically includes measuring height data of the position of each observation point on the ground observed area.
Specifically, the ground observed area refers to a ground area about which a three-dimensional ground model is to be built, and the ground area has an area that may cause an error influence on three-dimensional ground modeling, such as a building area, since the building itself has a certain height, when performing aerial ranging, the ranging system actually acquires height data of the top of the building, not height data of the ground, and an error inevitably occurs when performing three-dimensional ground modeling using the height data of the top of the building, and the ground area also has an area that may not cause an error influence on three-dimensional ground modeling, such as a road having a certain width, an open space not covered by the building, and a road having a certain width is not affected by the buildings on both sides, and meanders forward only with the state of high and low ground level, so that it can well show the ground, meanwhile, the open space which is not covered by the building can well show the ground, so that the influence of the building on the three-dimensional ground modeling is avoided, and therefore, if the height data of the highway area and the open space area on the observed ground area are obtained, the three-dimensional ground modeling can be completed;
when a three-dimensional coordinate system on the ground observed area is established, the central position of the ground observed area is taken as the origin of the coordinate system,
Figure 372634DEST_PATH_IMAGE001
the positive direction of the axis is vertically upward,
Figure 32286DEST_PATH_IMAGE002
shaft and
Figure 115648DEST_PATH_IMAGE021
the axial direction can be freely set according to the actual situation, for example, the warp direction and the weft direction are respectively used as
Figure 645987DEST_PATH_IMAGE022
Shaft and
Figure 664758DEST_PATH_IMAGE021
positive direction of axis, with observation point on the ground
Figure 936340DEST_PATH_IMAGE002
Shaft and
Figure 698759DEST_PATH_IMAGE003
the coordinate values on the axis represent their specific position on the ground, the observation point on the ground being
Figure 614763DEST_PATH_IMAGE023
The coordinate values on the axes represent height data obtained by the aerial ranging technique at the position of the observation point.
Furthermore, before extracting each coordinate point on the figure outline forming the highway area on the two-dimensional electronic map in the step two, the method also comprises the steps of obtaining the actual highway width data of the highway area on the two-dimensional electronic map in advance, comparing the data with a highway width threshold value preset by a system, when the road width data is larger than the road width threshold value, extracting each coordinate point on the graphic outline forming the corresponding road area, and before extracting each coordinate point on the graphic outline forming the open area on the two-dimensional electronic map in the second step, also obtaining the actual floor area data of the open area on the two-dimensional electronic map in advance and comparing the floor area data with the floor area threshold value of the open area preset by the system, when the floor space data is greater than the floor space threshold, extracting each coordinate point on the graphic profile forming the corresponding floor space region.
Specifically, considering that the acquisition of the height values of the positions of the observation points on the observed area of the ground has been completed in step one, wherein the positions of the observation points may be one point on the road or the open ground or one point on the top of the building, in order to find the observation points on the road or the open ground and further model the three-dimensional ground through the positions and the height values thereof, in step two, a two-dimensional electronic map corresponding to the observed area of the ground needs to be acquired first, and the two-dimensional electronic map describes the specific positions of the road area and the open ground area on the ground and the graphic outlines thereof in detailAs long as a plane coordinate system is established on the two-dimensional electronic map, the concrete positions of all points on the graphic outline of the road area and the open space area can be conveniently determined, when the plane coordinate system on the two-dimensional electronic map is established, the central position on the two-dimensional electronic map is taken as the origin of the coordinate system,
Figure 397911DEST_PATH_IMAGE006
shaft and
Figure 32155DEST_PATH_IMAGE005
the direction of the axis can be freely set according to the actual situation, and the method for establishing the plane coordinate system of the two-dimensional electronic map ensures that the origin of the plane coordinate system is overlapped with the origin of the three-dimensional coordinate system in the first step, avoids the need of coordinate translation during coordinate conversion in the subsequent steps, and simplifies the steps of coordinate conversion.
Further, referring to fig. 2, finding a matching three-dimensional coordinate point on the three-dimensional coordinate system in the step one includes the following steps:
first, determining the three-dimensional coordinate system in step one respectively
Figure 332686DEST_PATH_IMAGE002
Shaft and
Figure 368775DEST_PATH_IMAGE003
unit scale on axis and plane coordinate system in step two
Figure 585474DEST_PATH_IMAGE004
Shaft and
Figure 441435DEST_PATH_IMAGE005
proportional relationship between unit scales on axis, and determining three-dimensional coordinate system in step one
Figure 545657DEST_PATH_IMAGE002
Positive direction of axis, and the plane coordinate system in step two
Figure 295307DEST_PATH_IMAGE006
The numerical value of the included angle between the positive directions of the axes;
secondly, based on the coordinate values of all coordinate points on the graph outline of the highway area and the open area obtained in the second step
Figure 826783DEST_PATH_IMAGE007
，
Figure 170039DEST_PATH_IMAGE008
Calculating the corresponding coordinate point on the three-dimensional coordinate system in the step one by using a coordinate conversion formula
Figure 77952DEST_PATH_IMAGE009
Shaft and
Figure 682109DEST_PATH_IMAGE010
coordinate values on the axis
Figure 384486DEST_PATH_IMAGE011
，
Figure 215039DEST_PATH_IMAGE008
The coordinate conversion formula is described as follows:
Figure 785697DEST_PATH_IMAGE012
wherein, in the step (A),
Figure 385306DEST_PATH_IMAGE013
，
Figure 993005DEST_PATH_IMAGE014
represents said
Figure 435487DEST_PATH_IMAGE009
Unit scale on axis relative to said
Figure 419624DEST_PATH_IMAGE006
Multiple of unit scale enlargement on axis，
Figure 139318DEST_PATH_IMAGE015
，
Figure 183498DEST_PATH_IMAGE016
Represents said
Figure 113276DEST_PATH_IMAGE003
Unit scale on axis relative to said
Figure 635525DEST_PATH_IMAGE005
The unit scale on the axis is expanded by a multiple of a value,
Figure 209725DEST_PATH_IMAGE017
，
Figure 549440DEST_PATH_IMAGE018
represents said
Figure 310722DEST_PATH_IMAGE002
The positive direction of the axis with
Figure 902241DEST_PATH_IMAGE019
The angle between the positive directions of the axes is numerical;
thirdly, judging the coordinate value
Figure 455582DEST_PATH_IMAGE020
And the observation point in the step one is
Figure 841564DEST_PATH_IMAGE002
Shaft and
Figure 355722DEST_PATH_IMAGE003
when the coordinate values on the axes are the same, taking the observation point as a three-dimensional coordinate point matched with the coordinate point on the figure outline of the highway area and the open space area in the step two on the three-dimensional coordinate system in the step one, and judging whether the coordinate value is the same
Figure 612915DEST_PATH_IMAGE011
And the observation point in the step one is
Figure 896129DEST_PATH_IMAGE002
Shaft and
Figure 718592DEST_PATH_IMAGE003
when the coordinate values on the axes are different, the coordinate values are obtained
Figure 720046DEST_PATH_IMAGE020
And taking the observation point with the nearest distance around as a three-dimensional coordinate point matched with the coordinate point on the figure outline of the highway area and the open area in the step two on the three-dimensional coordinate system in the step one.
Specifically, through the above coordinate conversion process, three-dimensional coordinate points matching the ground position of the coordinate points on the graphical contour of the road area and the open space area on the two-dimensional electronic map can be found on the three-dimensional coordinate system of the observed area on the ground, that is, the observation points on the road area and the open space area can be found from a large number of observation points in step one, and finally, the plane positions of the coordinate points on the graphical contour of the road area and the open space area on the three-dimensional coordinate system can be obtained
Figure 512421DEST_PATH_IMAGE020
Wherein, in the process of performing the coordinate conversion, the three-dimensional coordinate system is considered to be overlapped with the origin of the plane coordinate system and the three-dimensional coordinate system
Figure 650141DEST_PATH_IMAGE002
Positive direction of axis and plane coordinate system
Figure 643505DEST_PATH_IMAGE004
There may be a certain angle between the positive directions of the axes, so that the formula is needed
Figure 256889DEST_PATH_IMAGE024
For coordinate points on a plane coordinate system
Figure 728322DEST_PATH_IMAGE007
While taking into account the three-dimensional coordinate system
Figure 720549DEST_PATH_IMAGE002
Shaft and
Figure 9447DEST_PATH_IMAGE003
of unit scale values on the axis, with a plane coordinate system
Figure 719914DEST_PATH_IMAGE006
Shaft and
Figure 995038DEST_PATH_IMAGE025
there is a certain proportional relationship between the unit scale values on the axis, so that it is also necessary to apply the proportional relationship to the coordinate points on the plane coordinate system
Figure 372930DEST_PATH_IMAGE007
Further enlarging or reducing the coordinate values, i.e. calculating
Figure 301571DEST_PATH_IMAGE026
The result of (1) is that three-dimensional coordinate points on the three-dimensional coordinate system match coordinate points on the graphic outlines of the road area and the open area
Figure 764914DEST_PATH_IMAGE009
Shaft and
Figure 578149DEST_PATH_IMAGE027
coordinate values on the axis
Figure 935181DEST_PATH_IMAGE011
。
Further, the three-dimensional coordinate points are located in step three
Figure 175670DEST_PATH_IMAGE028
Coordinate axisThe process of calculating the height value of the position of each coordinate point on the graphic profile of the highway region and the open space region in the second step includes judging that the three-dimensional coordinate point is located at the same position on the three-dimensional coordinate system as the coordinate point on the graphic profile of the highway region and the open space region in the second step when the three-dimensional coordinate point matched with the coordinate point on the graphic profile of the highway region and the open space region in the second step is unique in the first step
Figure 860729DEST_PATH_IMAGE001
And taking coordinate values on the coordinate axes as the height values, and judging that the three-dimensional coordinate points are located when the three-dimensional coordinate points matched with the coordinate points on the graph outlines of the highway area and the open area in the step two are not unique in the step one three-dimensional coordinate system
Figure 602289DEST_PATH_IMAGE028
The average value of the coordinate values on the coordinate axis is taken as the height value.
Specifically, through the above-described execution steps, the plane positions of the respective coordinate points on the graphic outlines of the highway region and the open space region, and the height values of the plane positions thereof have been obtained, whereby the three-dimensional ground can be modeled based on these data.
Further, the step four is based on the plane position of each coordinate point on the graphic outline of the highway area and the open space area and the height value of the plane position, the ground surface is three-dimensionally reconstructed, the surface reconstruction is to use the discrete coordinate point data obtained by measurement to perform preprocessing and then use a proper algorithm to fit a mathematical model of the surface, the three-dimensional reconstruction of the surface, namely the surface fitting method, is many, such as Shepard method, multiquartic method, thin plate spline method, finite element method, non-uniform rational B spline method and the like, the three-dimensional ground modeling can be specifically completed by using the NURBS surface fitting algorithm, the NURBS surface has good continuity, smoothness, affine invariance, perspective invariance, local control and other excellent characteristics, and is a strong geometric tool for designing, analyzing and processing the surface modeling, therefore, the three-dimensional ground modeling is performed by using the NURBS surface fitting algorithm, has good flexibility and high precision.
Referring to fig. 3, the present invention further provides a system for processing three-dimensional model data of a ground for photovoltaic system installation, which is used to implement the method for processing three-dimensional model data of a ground for photovoltaic system installation described in the foregoing, and specifically includes the following modules:
the system comprises a first module, a second module and a third module, wherein the first module is used for establishing a three-dimensional coordinate system on a ground observed area, equally dividing the ground observed area into square areas with the same size according to a preset observation interval value, selecting four vertexes on each square area as observation points on the ground observed area, and simultaneously obtaining coordinate values of the observation points on the three-dimensional coordinate system.
And the second module is used for acquiring a two-dimensional electronic map corresponding to the observed area on the ground, establishing a plane coordinate system on the two-dimensional electronic map, extracting all coordinate points on the graphic outline of the road area and the open area on the two-dimensional electronic map, and acquiring coordinate values of the coordinate points on the plane coordinate system.
A third module, configured to find a three-dimensional coordinate point matching the coordinate point on the three-dimensional coordinate system based on the coordinate values of the coordinate points on the graphic outlines of the road area and the open area on the two-dimensional electronic map obtained in the second module, and further find the three-dimensional coordinate point on the three-dimensional coordinate system based on the coordinate values of the coordinate points on the graphic outlines of the road area and the open area on the two-dimensional electronic map obtained in the second module
Figure 689193DEST_PATH_IMAGE001
And calculating the height value of the position of each coordinate point on the graphic profile of the highway area and the open area by the coordinate values on the coordinate axes.
And the fourth module is used for generating a three-dimensional ground model by using a curved surface fitting algorithm according to the coordinate values of all coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map corresponding to the observed area of the ground on a plane coordinate system and the height value of the positions of the coordinate points.
It should be understood that, although the steps in the flowcharts of the embodiments of the present invention are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a portion of the steps in various embodiments may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performance of the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. A ground three-dimensional model data processing method for photovoltaic system installation is characterized by comprising the following steps:
s1, establishing a three-dimensional coordinate system on the ground observed area, equally dividing the ground observed area into square areas with the same size according to a preset observation interval value, selecting four vertexes of each square area as observation points on the ground observed area, and simultaneously obtaining coordinate values of each observation point on the three-dimensional coordinate system;
s2, acquiring a two-dimensional electronic map corresponding to the observed area of the ground, establishing a plane coordinate system on the two-dimensional electronic map, extracting coordinate points on the graphic outline of the road area and the open area forming the two-dimensional electronic map, and acquiring coordinate values of the coordinate points on the plane coordinate system;
s3, based on the coordinate values of the coordinate points on the graphic contour of the highway area and the open space area on the two-dimensional electronic map obtained in S2, the three-dimensional coordinate points matched with the coordinate values are found out on the three-dimensional coordinate system in S1, and then the coordinate values of the three-dimensional coordinate points on the coordinate axes calculate the height values of the positions of the coordinate points on the graphic contour of the highway area and the open space area;
and S4, generating a three-dimensional ground model by using a surface fitting algorithm according to the coordinate values of the coordinate points on the plane coordinate system and the height values of the positions of the coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map corresponding to the observed area of the ground.
2. The method as claimed in claim 1, wherein the ground three-dimensional model data processing method for photovoltaic system installation includes a building area, a road area, and an open space area in the observed ground area in S1, and the step of obtaining coordinate values of each observation point on the Z coordinate axis of the three-dimensional coordinate system in S1 includes measuring height data of a position of each observation point on the observed ground area.
3. The method as claimed in claim 1, wherein the step of processing the three-dimensional model data of the ground for installing the photovoltaic system comprises, before extracting the coordinates of the road region on the two-dimensional electronic map, the step of obtaining the actual road width data of the road region on the two-dimensional electronic map and comparing the actual road width data with a road width threshold preset by the system in step S2, when the road width data is greater than the road width threshold, the coordinates of the road region on the road region are extracted, and the step of obtaining the actual floor area data of the open area on the two-dimensional electronic map and comparing the actual floor area data with a floor area threshold preset by the system in step S2, when the floor area data is greater than the floor area threshold, the respective coordinate points constituting the figure outline corresponding to the open space region are extracted.
4. The method according to claim 1, wherein the step of calculating the height value of the position of each coordinate point on the graphic profile of the highway region and the open space region in S2 from the coordinate values of the three-dimensional coordinate points on the coordinate axes in S3 comprises determining that the coordinate values of the three-dimensional coordinate points on the coordinate axes are the height value when the three-dimensional coordinate points on the three-dimensional coordinate system in S1 that match the coordinate points on the graphic profile of the highway region and the open space region in S2 are unique, and determining that the average of the coordinate values of the three-dimensional coordinate points on the coordinate axes is the height value when the three-dimensional coordinate points on the three-dimensional coordinate system in S1 that match the coordinate points on the graphic profile of the highway region and the open space region in S2 are not unique.
5. The method for processing the three-dimensional ground model data for photovoltaic system installation according to claim 1, wherein when the three-dimensional coordinate system on the observed region on the ground is established in S1, the center position of the observed region on the ground is taken as the origin of the three-dimensional coordinate system.
6. The method for processing the three-dimensional ground model data for photovoltaic system installation according to claim 1, wherein when the planar coordinate system on the two-dimensional electronic map corresponding to the observed area on the ground is established in S2, the central position of the two-dimensional electronic map is used as the origin of the planar coordinate system.
7. A ground three-dimensional model data processing system for photovoltaic system installation, which is used for realizing the method according to any one of claims 1-6, and is characterized by comprising the following modules:
the system comprises a first module, a second module and a third module, wherein the first module is used for establishing a three-dimensional coordinate system on a ground observed area, equally dividing the ground observed area into square areas with the same size according to a preset observation interval value, selecting four vertexes on each square area as observation points on the ground observed area, and simultaneously obtaining coordinate values of the observation points on the three-dimensional coordinate system;
the second module is used for acquiring a two-dimensional electronic map corresponding to the observed area on the ground, establishing a plane coordinate system on the two-dimensional electronic map, extracting coordinate points on the graphic outline of the road area and the open area on the two-dimensional electronic map, and acquiring coordinate values of the coordinate points on the plane coordinate system;
the third module is used for searching three-dimensional coordinate points matched with the coordinate values of the coordinate points on the graphic outlines of the highway area and the open area on the three-dimensional coordinate system based on the coordinate values of the coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map obtained in the second module, and then calculating the height values of the positions of the coordinate points on the graphic outlines of the highway area and the open area according to the coordinate values of the three-dimensional coordinate points on the coordinate axes;
and the fourth module is used for generating a three-dimensional ground model by using a surface fitting algorithm according to the coordinate values of all coordinate points on the graphic outlines of the highway area and the open area on the two-dimensional electronic map corresponding to the observed area of the ground on a plane coordinate system and the height value of the positions of the coordinate points.
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