CN112328722B - Rapid loading method and system for three-dimensional GIS and model data of power substation - Google Patents
Rapid loading method and system for three-dimensional GIS and model data of power substation Download PDFInfo
- Publication number
- CN112328722B CN112328722B CN202011251991.2A CN202011251991A CN112328722B CN 112328722 B CN112328722 B CN 112328722B CN 202011251991 A CN202011251991 A CN 202011251991A CN 112328722 B CN112328722 B CN 112328722B
- Authority
- CN
- China
- Prior art keywords
- data
- dimensional
- model
- substation
- power
- 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.)
- Active
Links
- 238000011068 loading method Methods 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 63
- 230000008520 organization Effects 0.000 claims abstract description 44
- 238000013507 mapping Methods 0.000 claims abstract description 16
- 238000010030 laminating Methods 0.000 claims abstract description 8
- 230000001788 irregular Effects 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 17
- 238000010586 diagram Methods 0.000 claims description 12
- 238000007726 management method Methods 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000009466 transformation Effects 0.000 claims description 10
- 238000010276 construction Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 9
- 230000004927 fusion Effects 0.000 claims description 6
- 238000009877 rendering Methods 0.000 claims description 6
- 238000005070 sampling Methods 0.000 claims description 6
- 238000004422 calculation algorithm Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000012876 topography Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 4
- 238000003384 imaging method Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 description 7
- 238000013523 data management Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000013499 data model Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/06—Energy or water supply
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Theoretical Computer Science (AREA)
- Databases & Information Systems (AREA)
- Economics (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Marketing (AREA)
- Remote Sensing (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- General Health & Medical Sciences (AREA)
- Human Resources & Organizations (AREA)
- Data Mining & Analysis (AREA)
- Primary Health Care (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- Processing Or Creating Images (AREA)
- Instructional Devices (AREA)
Abstract
The invention relates to a method and a system for rapidly loading three-dimensional GIS and model data of a power substation, which are characterized by comprising the following steps: 1) Establishing a three-dimensional GIS data organization structure based on a scene graph; 2) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), expressing the multi-layer image data in the power transformer substation by adopting a data laminating mapping method based on the multi-layer image, so as to realize the rapid loading of the multi-layer image data; 3) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the multi-source heterogeneous terrain data in the power substation engineering are fused rapidly; 4) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the three-dimensional model data in the power substation engineering is rapidly loaded and visualized. The method can be widely applied to the field of rapid loading of three-dimensional GIS data of the power transformer substation.
Description
Technical Field
The invention relates to the field of power transmission and transformation engineering, in particular to a method and a system for rapidly loading three-dimensional GIS (Geographic Information System ) and model data of a power substation.
Background
With the advancement of power grid construction, data generated in power transmission and transformation engineering construction also grows exponentially. A large amount of application data is generated and effective management is realized in the transformer substation engineering construction process serving as a network end starting point, but for GIS data and transformer substation model data, due to the fact that data sources are wide, data amount is large and major is involved, management of the data is still remained in a scattered traditional database and a simple visual management stage at present, and the generated data 'barriers' cause poor management coordination, low speed and low efficiency, can only be temporarily avoided through means of hardware accumulation or improvement of equipment performance and the like, and seriously influence the management efficiency and benefit of transformer substation engineering.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method and a system for rapidly loading three-dimensional GIS and model data of an electric power substation, and provides a rapid, visual and efficient data management and loading means which can effectively assist in the data management work of substation engineering.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a three-dimensional GIS and model data rapid loading method of an electric power substation comprises the following steps:
1) Establishing a three-dimensional GIS data organization structure based on a scene graph;
2) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), expressing the multi-layer image data in the power transformer substation by adopting a data laminating mapping method based on the multi-layer image, so as to realize the rapid loading of the multi-layer image data;
3) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the multi-source heterogeneous terrain data in the power substation engineering are fused rapidly;
4) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the three-dimensional model data in the power substation engineering is rapidly loaded and visualized.
Further, in the step 1), the three-dimensional GIS data organization structure based on the scene graph comprises a scene graph and a three-dimensional engine;
the scene graph is described by multi-layer nodes, the node types comprise drawing nodes, functional nodes and camera nodes, the drawing nodes are minimum node units of the scene graph, and three-dimensional GIS data and power substation model data are formed by combining the drawing nodes;
the functional nodes are used as logic control units and are used for carrying out combination association on the drawing nodes and carrying out logic processing or management on the drawing nodes; the functional nodes comprise transformation nodes for controlling the position and the posture of the drawing nodes, switch nodes for controlling the display and the hiding of the drawing nodes, LOD nodes for presenting the model multilevel state and proxy nodes for dynamically recording and deleting the nodes; the camera nodes are only one, correspond to the view angles of observers and are used for determining the final imaging mode of the scene;
the three-dimensional engine is used for realizing the functions of loading and rendering general three-dimensional scene data, and comprises a three-dimensional data drawing state, a vertex and index, a model matrix, three-dimensional logic processing and a view projection matrix, wherein the three-dimensional data drawing state, the vertex and index, the model matrix, the three-dimensional logic processing and the view projection matrix are respectively mapped with the drawing state of the drawing node, the transformation node, the functional node and the camera node one by one.
Further, in the step 2), when the multi-layer influence data related in the power substation engineering is rapidly loaded, the method includes the following steps:
2.1 A set of global unified space scene is constructed based on a tile quadtree method of a three-dimensional scene graph, and the whole earth in the space scene is expressed by adopting a set of terrain tiles whether global or local;
2.2 The image layer data in the power transformer substation are related to each terrain tile in a texture mode, and the UV processing of the multi-layer image data is carried out according to the principle of high-resolution mapping of the high-mode surface and low-resolution mapping of the low-mode surface during the association;
2.3 Based on the normal vector mapping technology, laminating the multi-layer images, recording normal vector information of the complex terrain surface by adopting a texture image, and realizing the rapid loading of the multi-layer image data.
Further, in the step 3), the method for quickly fusing the multi-source heterogeneous topographic data comprises the following steps:
3.1 Organizing all terrain data of different sources according to a pyramid structure, and dividing the pyramid into a plurality of independent terrain tiles according to a hierarchy;
3.2 According to the topographic data information stored in each individual topographic tile, the topographic network is carried out, and the rapid fusion of the multi-source heterogeneous topographic data is realized.
Further, in the step 3.1), the method of organizing all the terrain data of different sources according to the pyramid structure and dividing the pyramid into a plurality of individual terrain tiles according to the hierarchy is as follows:
firstly, data sampling is carried out on topographic data from different sources from top to bottom according to the sequence from low data precision to high data precision and according to the resolution of an image, so that a fixed resolution consistent with the image is formed; then constructing a pyramid according to the rule same as the image;
then, all the terrain data are divided into individual terrain tiles which are continuous in space and are not overlapped with each other according to different levels of the pyramid, and each individual terrain tile is encoded by a unique layer row number and an identifier, wherein the identifier G indicates a regular grid tile, and the identifier T indicates an irregular triangular grid tile.
Further, in the step 3.2), according to the topographic data information stored in each individual topographic tile, the method for implementing the rapid fusion of the multi-source heterogeneous topographic data is as follows:
for the regular grid tile data, interpolating and sampling to obtain the elevation information of each grid point from the regular grid tile data according to grid subdivision from north to south and from west to east according to the geographic range meta-information of the regular grid tiles, thereby completing the grid construction of the regular grid topography;
and for the irregular triangular network tile data, restoring the network structure of the irregular triangular network terrain according to the longitude, latitude, altitude information and triangular surface index information of each irregular triangular network triangular surface point recorded in the irregular triangular network tile data.
Further, in the step 4), the method for rapidly loading and visualizing the three-dimensional model data in the power substation engineering comprises the following steps:
4.1 Simplifying the three-dimensional model of each transformer substation by using the area threshold-based automatic simplification method of the geometric collaborative texture of the three-dimensional model of each transformer substation to obtain a three-dimensional model of the fine power transformer substation;
4.2 Displaying the requirements of different precision models according to the space position information of the power transformer substation and the set different visible heights, and simplifying the simplified three-dimensional model of the transformer substation in the step 4.1) again according to different thresholds to obtain an LOD level model of the power transformer substation;
4.3 Picking LOD models in the scene according to the three-dimensional scene viewpoint position, the sight direction and other parameters, establishing an electric power point compiling block space index mechanism, and realizing rapid loading and displaying of three-dimensional model data of the transformer substation.
Further, in the step 4.1), the method for simplifying the three-dimensional model of each transformer substation by using the geometric collaborative texture automatic simplification method of the three-dimensional model of the transformer substation based on the area threshold value to obtain the three-dimensional model of the fine power transformer substation comprises the following steps:
4.1.1 Analyzing the original three-dimensional model of the power transformer substation in different formats, traversing each triangular surface of the original three-dimensional model of the power transformer substation, and calculating the area of each triangle;
4.1.2 Sequencing all triangular faces of the original three-dimensional models of all the power substations according to the size of the area to obtain a triangular list of the original three-dimensional models of all the power substations, and calculating an area threshold;
the area threshold calculation formula is as follows:
wherein: n is the number of triangular faces S i For the area of each triangular surface, delta is an empirical threshold less than 1, and delta s is an area threshold of the substation model;
4.1.3 Traversing a triangle list of the original three-dimensional model of each power transformer substation, and deleting the triangle if the area of the triangle is smaller than an area threshold value;
4.1.4 Reconstructing an index for the three-dimensional model of the power transformer substation after deleting the triangular surface according to the vertex position and index information of the three-dimensional model of the original power transformer substation, and outputting a fine three-dimensional model of the power transformer substation according to corresponding texture images and coordinate information;
4.1.5 The texture of the model is spliced based on a least horizontal line preferred insertion algorithm, all triangular surface textures are arranged in a descending order according to the principle of area preference, and optimized combination and combination are carried out to generate a piece of texture.
Further, in the step 4.3), the model in the scene is selected according to the viewpoint position and the sight direction parameter of the three-dimensional scene, and a power point compiling block space index mechanism is established, so that the method for rapidly loading and displaying the three-dimensional model data of the transformer substation is realized, and comprises the following steps:
4.3.1 Taking a planar structure diagram of the power transformer substation as a dividing principle, equally dividing the whole substation area into m x n square cells with uniform sizes, and calculating cell position coordinates (x, y) according to the following formula:
wherein length is the length of the transformer station, width is the width of the transformer station, a is the number of cells along the length direction, and b is the number of cells along the width direction;
4.3.2 Whether all devices in the traversal model fall within the corresponding cell: if so, binding all the devices in the cell with the cell; if not, continuing to traverse the next cell until all the devices are allocated to the unique cell;
4.3.3 During the process of the three-dimensional scene roaming, traversing all the cells in real time according to the viewpoint positions, judging whether each cell meets the current visual distance judgment, if so, loading all the equipment models bound by the cell, and if not, loading the equipment models, and continuing to judge the next cell.
In a second aspect of the present invention, a three-dimensional GIS and model data rapid loading system for an electric power substation is provided, which includes:
the data organization structure module is used for establishing a three-dimensional GIS data organization structure based on a scene graph to realize unified organization of three-dimensional GIS data and model data in the power transformer substation, wherein the three-dimensional GIS data comprises multi-layer image data and multi-source heterogeneous topographic data;
the image loading module is used for expressing the multi-layer image data in the power transformer substation based on the established three-dimensional GIS data organization structure based on the scene graph, so as to realize the rapid loading of the multi-layer image data;
the terrain loading module is used for quickly fusing multi-source heterogeneous terrain data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph;
the model loading module is used for rapidly loading and visualizing the three-dimensional model data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph.
Due to the adoption of the technical scheme, the invention has the following advantages: according to the invention, by combining with the actual requirements of the power substation engineering data management work, a set of feasible substation three-dimensional GIS data management and loading method is researched from the aspects of data integration, algorithm and software driving, a three-dimensional scene graph mechanism suitable for three-dimensional geographic information GIS data and power substation three-dimensional model data organization is constructed, a data organization structure is optimized, a data space index is quickly built, and the substation three-dimensional model data with fine and dense automation processing equipment is solved, so that the problems of quick self-adaptive loading of the substation model data and fusion management with multi-source heterogeneous GIS data are solved, and the efficiency of the substation engineering data management work is greatly improved.
Drawings
FIG. 1 is a three-dimensional engine-based substation GIS scene graph structure of the present invention;
FIG. 2 is a substation GIS scene graph design of the present invention;
FIG. 3 is a surface normal vector map of high-mode and low-mode images according to the present invention;
FIG. 4 is a hybrid topography network of the present invention;
fig. 5 is a schematic diagram of loading a three-dimensional scene of a transformer substation LOD model according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
According to the three-dimensional GIS and model data rapid loading method of the power substation, firstly, a set of three-dimensional GIS data organization structure based on a scene graph is established according to the characteristics of GIS data and three-dimensional model data related in the engineering construction of the power substation, and unified management of all data is realized through different node states and association; then, loading the data of the multi-layer images is realized through data laminating mapping of the multi-layer images; meanwhile, the expression of the multi-source heterogeneous fine terrain is realized by locally adding a high-resolution irregular triangular mesh model into a large-range low-resolution regular mesh; finally, based on the improved automatic simplifying method of the power substation model and an efficient LOD scheduling mechanism, the three-dimensional GIS data of the power substation is rapidly loaded and displayed. Specifically, the method comprises the following steps:
1) And establishing a three-dimensional GIS data organization structure based on the scene graph, and uniformly organizing GIS data and three-dimensional model data related in the engineering construction of the power substation.
The data types aimed at in the invention mainly comprise three-dimensional GIS data and three-dimensional model data of the power substation. The three-dimensional GIS data refer to basic geographic data with coordinate projection information in the engineering range of the power substation, the basic geographic data comprises an orthographic image, a digital elevation model and the like, and the three-dimensional model data of the power substation refer to triangular surface-mount three-dimensional model data completed by adopting manual modeling.
In order to efficiently manage the data with different types and structures, the invention designs the basic organization framework and the specification of the scene data, and lays a foundation for the management and the loading of the follow-up data.
As shown in FIG. 1, the data in the scene are organized together in the form of a graph or tree, each drawing node, each function node and each camera node are defined as one node in the scene graph, and the custom scene effect can be realized by designing various nodes and associating the nodes.
Specifically, the three-dimensional GIS data organization structure based on the scene graph comprises a scene graph and a three-dimensional engine.
The scene graph is described in terms of multiple layers of nodes, the node types including rendering nodes, functional nodes, and camera nodes. The three-dimensional GIS data and the power substation model data are formed by combining the basic drawing nodes, and finally a complete three-dimensional scene is displayed; the functional nodes exist as logic control units and do not contain any scene data, and are mainly used for combining and associating the drawing nodes, so that the function of logically processing or managing the drawing nodes is achieved. The functional nodes generally comprise various functional nodes such as transformation nodes (controlling the position and the posture of drawing nodes), switch joints (controlling the display and the hiding of the drawing nodes), LOD nodes (model multilevel states), proxy nodes (node dynamic loading and deleting) and the like; the final imaging mode of the scene is determined by only one camera node corresponding to the viewing angle of the observer. In addition, each node may associate multiple drawing states, and if a child node does not have an associated state, the drawing state will be inherited from the parent node.
The three-dimensional engine is a core of the whole system and is mainly responsible for realizing the specific realization of the universal three-dimensional scene data loading and rendering functions. The three-dimensional data drawing method mainly comprises three-dimensional data drawing states (textures, materials and the like), vertexes and indexes, model matrixes, three-dimensional logic processing, view projection matrixes and the like. These elements are mapped one by one to the corresponding nodes of the scene graph, such as the vertex index is mainly represented as a drawing node, the model matrix is represented as a transformation node, the logic processing is represented as a functional node, the view projection matrix is represented as a camera node, and the like. Through the mapping mechanism, all data in the scene are organized together in a tree diagram form, so that unified organization and efficient management of three-dimensional scene data are realized.
As shown in fig. 2, a scene diagram including a plurality of images (1 to n) and a plurality of substation devices (1 to n) is established in the embodiment of the present invention. Wherein the first layer is a camera node that determines the position and orientation of the observer; the second layer is a functional node (transformation node) for controlling the positions and orientations of the ground and the transformer in the scene; the third layer is a drawing node (model node and terrain node) which contains geometric information of ground and substation equipment, and each drawing node is associated with a drawing state (texture state) and contains state information such as images, textures and materials of the substation equipment, so that a three-dimensional scene of the substation established on the ground can be restored through a three-dimensional engine.
2) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the multi-layer image data in the power transformer substation is expressed by adopting a data laminating mapping method based on the multi-layer images, so that the rapid loading of the multi-layer image data is realized.
In the traditional three-dimensional GIS software, the terrain grid is reconstructed once when each layer of image is added, and as the number of layers of the image is increased, the system memory consumption is greatly occupied and the drawing efficiency is greatly affected. The invention provides a data laminating mapping technology based on multilayer images, which realizes the expression of multilayer image data.
Specifically, the method comprises the following steps:
2.1 A set of global unified space scene is constructed based on a tile quadtree method of the three-dimensional scene graph, namely the whole earth is expressed by adopting a set of terrain tiles whether global or local.
2.2 Image layer data in the power transformer substation are related to each terrain tile layer by layer in a texture mode, wherein the multi-layer image is equivalent to a plurality of textures of one terrain geometry, and the coverage and fusion among the plurality of image layers are realized by combining a multi-level texture mapping technology.
2.3 Based on the normal vector mapping technology, laminating the multi-layer images (textures), and recording normal vector information of the complex terrain surface by adopting a texture image, thereby realizing the rapid loading of the multi-layer image data.
As shown in fig. 3, the UV processing of the multi-layer image data is performed according to the principle of high resolution mapping high-mode surface and low resolution mapping low-mode surface, and meanwhile, the normal vector information of the complex terrain surface is recorded by means of one texture image, so that the detail representation of the multi-image ground is rapidly realized. Particularly, in the application of the power substation visualization in the network environment, the system overhead caused by data transmission and drawing is effectively reduced, and the loading efficiency and effect of the multi-image data are greatly improved.
3) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the multi-source heterogeneous terrain data in the power substation engineering is fused rapidly.
In order to solve the problem of heterogeneous topographic data in the transformer substation engineering, the invention uses the method that the data is distributed in 100km 2 Adding 1km into the large-range low-resolution Grid (regular Grid) terrain scene 2 The following local high resolution TIN gridThe integration expression of the multi-source heterogeneous terrain is realized by the network (Triangulated Irregular Network) model, so that not only is the mosaic integration of different source terrain data satisfied, but also the technical bottleneck of constructing a fine terrain scene in a large scale is solved.
3.1 Terrain pyramid data organization: the method comprises the steps of constructing the terrain data of different sources into a pyramid structure according to resolution, and dividing the constructed pyramid into a plurality of individual terrain tiles according to a hierarchy.
Specifically, the topographic pyramid data organization method comprises the following steps:
firstly, in order to maintain consistency with an image pyramid data structure, the topographic data of different sources are subjected to data sampling from top to bottom according to the sequence from low data precision to high data precision and the resolution of an image, so that a fixed resolution consistent with the image is formed; and then constructing a pyramid according to the same rule as the image.
Then, all the terrain data are divided into individual terrain tiles which are continuous in space and are not overlapped with each other according to different levels of the pyramid, each terrain tile is encoded by a unique layer row and column number and an identifier, wherein the identifier G indicates a regular grid tile, and the identifier T indicates an irregular triangular grid tile.
As shown in fig. 4, the regular grid pyramid construction is sequentially and regularly split according to a top-to-bottom uniform resolution dichotomy, and each layer of tiles and the parent layer of tiles, and the sub-layer of tiles have the characteristics of space continuity and boundary consistency; the irregular triangular net pyramid is built in the area range of the irregular triangular net, and subdivision is carried out from top to bottom according to the detail level until all tiles cover the area range of the irregular triangular net in a seamless mode.
3.2 Tile data structure): and (3) constructing a regular grid and an irregular grid according to the terrain data information stored in each individual terrain tile, so as to realize the rapid loading of multi-source heterogeneous terrain data.
The regular grid is compatible with the mainstream tile data format, and the tile file stores an elevation data array of each sampling point divided according to the geographic range rule. After the client requests the regular grid tile data, the client interpolates and samples the elevation information of each grid point from the regular grid tile data according to grid subdivision from north to south and from west to east according to the tile geographic range meta-information, thereby completing the grid construction of the regular grid topography, namely
The irregular triangle network tile data is in a custom data format, and the longitude, latitude and elevation information of all triangle network points falling in the current tile and index information of each point when the triangle network is drawn are stored in the tile file. After the client requests the irregular triangle network tile data, the client restores the network structure of the irregular triangle network topography according to the longitude, latitude, altitude information and triangle index information of each irregular triangle network triangle surface point recorded in the tile data, namely
4) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the three-dimensional model data in the power substation engineering is rapidly loaded and visualized with high efficiency.
Specifically, the method comprises the following steps:
4.1 Fine substation model simplification): the three-dimensional model of each transformer substation is simplified by the automatic simplification method of the geometric collaborative texture of the three-dimensional model of the transformer substation based on the area threshold value, and the simplified three-dimensional model of different coefficients of the fine power transformer substation is obtained.
The three-dimensional model of the substation may be described in correspondence to LOD nodes. The LOD node may comprise multiple levels of rendering nodes, such as one for original precision, one for 0.5 reduced precision, and one for 0.1 reduced precision.
A general three-dimensional model consists of 2 parts of geometry and texture. In the current three-dimensional model of the power transformer substation, a model established manually mainly adopts a triangular network model. The invention provides an area threshold-based substation model geometric collaborative texture automatic simplification method based on traditional three-dimensional model geometric triangle network simplification, which comprises the following steps:
4.1.1 Analyzing the original three-dimensional model of the power transformer substation in different formats, traversing each triangular surface of the original three-dimensional model of the power transformer substation, and calculating the area of each triangle;
4.1.2 Sequencing all triangular surfaces of the original three-dimensional models of all power substations according to the size of the area to obtain a triangular list of the original three-dimensional models of all power substations, and calculating an area threshold value, wherein the area threshold value has the following calculation formula:
wherein: n is the number of triangular faces S i For each triangular face area, δ is an empirical threshold less than 1, and Δs is the area threshold of the substation model.
4.1.3 Deleting triangular faces): traversing a triangle list of the original three-dimensional model of each power substation, and deleting the triangle if the area of the triangle is smaller than an area threshold value.
4.1.4 Regenerating the model: and reconstructing indexes for the three-dimensional model of the power substation after deleting the triangular surface according to the vertex positions and the index information of the three-dimensional model of the original power substation, and outputting the three-dimensional model of the fine power substation according to corresponding texture images and coordinate information. For a fine power substation three-dimensional model, relevant baking texture information also needs to be saved.
4.1.5 Texture merge: and splicing textures of the model based on a least horizontal line preferred insertion algorithm, arranging the triangular surface textures in a descending order according to an area preferred principle, and carrying out optimized combination and merging to generate one texture.
4.2 Transformer substation model LOD expression: and displaying the requirements of the models with different accuracies according to the space position information of the power transformer substation and the set different visible heights, and simplifying the three-dimensional model of the fine power transformer substation again according to different thresholds to obtain the LOD hierarchical model of the power transformer substation.
The LOD data of the transformer substation is hierarchical iteration data established on the basis of original data of the model, multilevel hierarchical detail information is established through model simplification, models with different details are loaded at different viewing distances, and therefore scheduling efficiency of the model data is improved. The LOD structure contains attribute information as shown in table 1 below.
Table 1 attribute information table included in LOD structure
| Attributes of | Value of |
| ID | LOD model mark |
| Visual range | 100,1000,20000 |
| Model file | Model level0, model level1, model level2 |
| Position of | 100,50,30 |
The multi-resolution information of the LOD model (model level0 is displayed at a viewing distance between 0 and 100 meters, model level1 is displayed at a viewing distance between 100 and 1000 meters, model level2 is displayed at a viewing distance between 1000 and 20000 meters) can be determined by analyzing the two attributes of the visual range and the model file, and the spatial information of the LOD model (the model is located at a position of 100 longitude, 50 latitude and 30 altitude) can be determined by analyzing the position attribute.
As shown in fig. 5, in the scene graph, the model may be represented by a node structure:
in a three-dimensional scene graph, the LOD model mainly contains four parts:
transformation node: responsible for the conversion of child nodes from a local coordinate system to a world coordinate system
LOD node: and the method is responsible for switching display of child nodes (proxy nodes) according to the perspective of the viewpoint.
Agent node: is responsible for dynamically loading and deleting model nodes.
Model node: the actual rendering nodes comprise grids and textures, and different model nodes have different resolutions.
The LOD model loading main flow is as follows:
a. obtaining a visual angle matrix of an observer, traversing all the cells, judging whether the cells are in a visual threshold range, if so, carrying out the next judgment, otherwise, ending;
b. traversing each layer of LOD model information in the current cell block, calculating screen pixels of the model in real time, judging LOD display levels meeting the current scene according to pixel values, and marking the LOD display levels as LOD_NEW;
c. recording the LOD level displayed before the update as LOD_LAST, judging whether the LOD_LAST is equal to LOD_NEW, and if so, jumping out; if not, turning to the step d;
d. loading a data model block corresponding to LOD_NEW;
e. and releasing the data model block corresponding to the LOD_LAST.
4.3 Fine substation model data fast loading: and selecting the LOD model in the scene according to the three-dimensional scene viewpoint position, the sight direction and other parameters, establishing an electric power point compiling block space index mechanism, and realizing the rapid loading and display of the three-dimensional model data of the transformer substation.
When a three-dimensional scene of a power substation roams, only a part of the range is usually visible for a given viewpoint position and line of sight direction. The invention discloses a method for selecting models in a scene according to three-dimensional scene viewpoint positions, sight directions and other parameters, and establishes a substation blocking spatial index mechanism, which comprises the following steps:
4.3.1 Using a plane structure diagram of the power transformer substation as a division principle, equally dividing the whole station area into m x n square cells with uniform sizes, and calculating cell position coordinates (x, y) according to the following formula
Where length is the transformer station length, width is the transformer station width, a is the number of cells along the length direction, and b is the number of cells along the width direction.
4.3.2 Whether all devices in the traversal model fall within the corresponding cell. If so, binding all the devices in the cell with the cell; if not, continuing to traverse the next cell until all the devices are allocated to the unique cell;
4.3.3 During the process of the three-dimensional scene roaming, traversing all the cells in real time according to the viewpoint positions, judging whether each cell meets the current visual distance judgment, if so, loading all the equipment models bound by the cell, and if not, loading the equipment models, and continuing to judge the next cell.
The invention also provides a three-dimensional GIS and model data rapid loading system of the power substation, which comprises:
the data organization structure module is used for establishing a three-dimensional GIS data organization structure based on a scene graph to realize unified organization of three-dimensional GIS data and model data in the power transformer substation, wherein the three-dimensional GIS data comprises multi-layer image data and multi-source heterogeneous topographic data;
the image loading module is used for expressing the multi-layer image data in the power transformer substation based on the established three-dimensional GIS data organization structure based on the scene graph, so as to realize the rapid loading of the multi-layer image data;
the terrain loading module is used for quickly fusing multi-source heterogeneous terrain data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph;
the model loading module is used for rapidly loading and visualizing the three-dimensional model data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
A specific embodiment is given above, but the invention is not limited to the described embodiment. The basic idea of the invention is that the above-mentioned scheme, it is not necessary for those skilled in the art to design various modified models, formulas, parameters according to the teaching of the present invention to take creative effort. Variations, modifications, substitutions and alterations are also possible in the embodiments without departing from the principles and spirit of the present invention.
Claims (8)
1. A three-dimensional GIS and model data rapid loading method of an electric power substation is characterized by comprising the following steps:
1) Establishing a three-dimensional GIS data organization structure based on a scene graph, wherein the three-dimensional GIS data comprises multi-layer image data and multi-source heterogeneous topographic data, and is used for uniformly organizing three-dimensional GIS data and model data in a power substation;
2) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), expressing the multi-layer image data in the power transformer substation, and realizing the rapid loading of the multi-layer image data;
3) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the multi-source heterogeneous terrain data in the power substation engineering are fused rapidly;
4) Based on the three-dimensional GIS data organization structure based on the scene graph established in the step 1), the three-dimensional model data in the power substation engineering is rapidly loaded and visualized;
in the step 4), the method for rapidly loading and visualizing the three-dimensional model data in the power substation engineering comprises the following steps:
4.1 Simplifying the three-dimensional model of each transformer substation by using the area threshold-based automatic simplification method of the geometric collaborative texture of the three-dimensional model of each transformer substation to obtain a three-dimensional model of the fine power transformer substation;
4.2 Displaying the requirements of different precision models according to the space position information of the power transformer substation and the set different visible heights, and simplifying the simplified three-dimensional model of the transformer substation in the step 4.1) again according to different thresholds to obtain an LOD level model of the power transformer substation;
4.3 Picking LOD models in the scene according to the three-dimensional scene viewpoint position, the sight direction and other parameters, establishing an electric power point compiling block space index mechanism, and realizing quick loading and display of three-dimensional model data of the transformer substation;
in the step 4.1), the three-dimensional model of each transformer substation is simplified by a geometric collaborative texture automatic simplification method of the three-dimensional model of the transformer substation based on an area threshold value, and the method for obtaining the three-dimensional model of the fine power transformer substation comprises the following steps:
4.1.1 Analyzing the original three-dimensional model of the power transformer substation in different formats, traversing each triangular surface of the original three-dimensional model of the power transformer substation, and calculating the area of each triangle;
4.1.2 Sequencing all triangular faces of the original three-dimensional models of all the power substations according to the size of the area to obtain a triangular list of the original three-dimensional models of all the power substations, and calculating an area threshold;
the area threshold calculation formula is as follows:
wherein: n is the number of triangular faces S i For the area of each triangular surface, delta is an empirical threshold less than 1, and delta s is an area threshold of the substation model;
4.1.3 Traversing a triangle list of the original three-dimensional model of each power transformer substation, and deleting the triangle if the area of the triangle is smaller than an area threshold value;
4.1.4 Reconstructing an index for the three-dimensional model of the power transformer substation after deleting the triangular surface according to the vertex position and index information of the three-dimensional model of the original power transformer substation, and outputting a fine three-dimensional model of the power transformer substation according to corresponding texture images and coordinate information;
4.1.5 The texture of the model is spliced based on a least horizontal line preferred insertion algorithm, all triangular surface textures are arranged in a descending order according to the principle of area preference, and optimized combination and combination are carried out to generate a piece of texture.
2. The method for quickly loading three-dimensional GIS and model data of power substation according to claim 1, wherein the method comprises the following steps: in the step 1), the established three-dimensional GIS data organization structure based on the scene graph comprises a scene graph and a three-dimensional engine;
the scene graph is described by multi-layer nodes, the node types comprise drawing nodes, functional nodes and camera nodes, the drawing nodes are minimum node units of the scene graph, and three-dimensional GIS data and power substation model data are formed by combining the drawing nodes;
the functional nodes are used as logic control units and are used for carrying out combination association on the drawing nodes and carrying out logic processing or management on the drawing nodes; the functional nodes comprise transformation nodes for controlling the position and the posture of the drawing nodes, switch nodes for controlling the display and the hiding of the drawing nodes, LOD nodes for presenting the model multilevel state and proxy nodes for dynamically recording and deleting the nodes; the camera nodes are only one, correspond to the view angles of observers and are used for determining the final imaging mode of the scene;
the three-dimensional engine is used for realizing the functions of loading and rendering general three-dimensional scene data, and comprises a three-dimensional data drawing state, a vertex and index, a model matrix, three-dimensional logic processing and a view projection matrix, wherein the three-dimensional data drawing state, the vertex and index, the model matrix, the three-dimensional logic processing and the view projection matrix are respectively mapped with the drawing state of the drawing node, the transformation node, the functional node and the camera node one by one.
3. The method for quickly loading three-dimensional GIS and model data of power substation according to claim 1, wherein the method comprises the following steps: in the step 2), when the multi-layer influence data related in the power substation engineering is rapidly loaded, the method comprises the following steps:
2.1 A set of global unified space scene is constructed based on a tile quadtree method of a three-dimensional scene graph, and the whole earth in the space scene is expressed by adopting a set of terrain tiles whether global or local;
2.2 The image layer data in the power transformer substation are related to each terrain tile in a texture mode, and the UV processing of the multi-layer image data is carried out according to the principle of high-resolution mapping of the high-mode surface and low-resolution mapping of the low-mode surface during the association;
2.3 Based on the normal vector mapping technology, laminating the multi-layer images, recording normal vector information of the complex terrain surface by adopting a texture image, and realizing the rapid loading of the multi-layer image data.
4. The method for quickly loading three-dimensional GIS and model data of power substation according to claim 1, wherein the method comprises the following steps: in the step 3), the method for quickly fusing the multi-source heterogeneous topographic data comprises the following steps:
3.1 Organizing all terrain data of different sources according to a pyramid structure, and dividing the pyramid into a plurality of independent terrain tiles according to a hierarchy;
3.2 According to the topographic data information stored in each individual topographic tile, the topographic network is carried out, and the rapid fusion of the multi-source heterogeneous topographic data is realized.
5. The method for quickly loading three-dimensional GIS and model data of the power substation as claimed in claim 4, wherein the method comprises the following steps: in the step 3.1), all terrain data from different sources are organized according to a pyramid structure, and the pyramid is divided into a plurality of independent terrain tiles according to a hierarchy by the following steps:
firstly, data sampling is carried out on topographic data from different sources from top to bottom according to the sequence from low data precision to high data precision and according to the resolution of an image, so that a fixed resolution consistent with the image is formed; then constructing a pyramid according to the rule same as the image;
then, all the terrain data are divided into individual terrain tiles which are continuous in space and are not overlapped with each other according to different levels of the pyramid, and each individual terrain tile is encoded by a unique layer row number and an identifier, wherein the identifier G indicates a regular grid tile, and the identifier T indicates an irregular triangular grid tile.
6. The method for quickly loading three-dimensional GIS and model data of the power substation according to claim 5, wherein the method comprises the following steps: in the step 3.2), according to the topographic data information stored in each individual topographic tile, the method for realizing the rapid fusion of the multi-source heterogeneous topographic data comprises the following steps:
for the regular grid tile data, interpolating and sampling to obtain the elevation information of each grid point from the regular grid tile data according to grid subdivision from north to south and from west to east according to the geographic range meta-information of the regular grid tiles, thereby completing the grid construction of the regular grid topography;
and for the irregular triangular network tile data, restoring the network structure of the irregular triangular network terrain according to the longitude, latitude, altitude information and triangular surface index information of each irregular triangular network triangular surface point recorded in the irregular triangular network tile data.
7. The method for quickly loading three-dimensional GIS and model data of power substation according to claim 1, wherein the method comprises the following steps: in the step 4.3), picking the model in the scene according to the viewpoint position and the sight direction parameter of the three-dimensional scene, establishing a power point compiling block space index mechanism, and realizing the method for rapidly loading and displaying the three-dimensional model data of the transformer substation, wherein the method comprises the following steps:
4.3.1 Taking a planar structure diagram of the power transformer substation as a dividing principle, equally dividing the whole substation area into m x n square cells with uniform sizes, and calculating cell position coordinates (x, y) according to the following formula:
wherein length is the length of the transformer station, width is the width of the transformer station, a is the number of cells along the length direction, and b is the number of cells along the width direction;
4.3.2 Whether all devices in the traversal model fall within the corresponding cell: if so, binding all the devices in the cell with the cell; if not, continuing to traverse the next cell until all the devices are allocated to the unique cell;
4.3.3 During the process of the three-dimensional scene roaming, traversing all the cells in real time according to the viewpoint positions, judging whether each cell meets the current visual distance judgment, if so, loading all the equipment models bound by the cell, and if not, loading the equipment models, and continuing to judge the next cell.
8. The utility model provides a three-dimensional GIS of electric power substation and model data quick loading system which characterized in that includes:
the data organization structure module is used for establishing a three-dimensional GIS data organization structure based on a scene graph to realize unified organization of three-dimensional GIS data and model data in the power transformer substation, wherein the three-dimensional GIS data comprises multi-layer image data and multi-source heterogeneous topographic data;
the image loading module is used for expressing the multi-layer image data in the power transformer substation based on the established three-dimensional GIS data organization structure based on the scene graph, so as to realize the rapid loading of the multi-layer image data;
the terrain loading module is used for quickly fusing multi-source heterogeneous terrain data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph;
the model loading module is used for rapidly loading and visualizing three-dimensional model data in the power substation engineering based on the established three-dimensional GIS data organization structure based on the scene graph;
in the model loading module, the method for rapidly loading and visualizing the three-dimensional model data in the power substation engineering comprises the following steps:
the three-dimensional model geometric collaborative texture automatic simplification method of the transformer substation based on the area threshold simplifies the three-dimensional model of each transformer substation to obtain a three-dimensional model of the fine power transformer substation;
displaying the requirements of different precision models according to the space position information of the power transformer substation and the set different visible heights, and simplifying the simplified three-dimensional model of the transformer substation again according to different thresholds to obtain an LOD (on-demand) level model of the power transformer substation;
selecting LOD models in the scene according to the three-dimensional scene viewpoint position, the sight direction and other parameters, establishing an electric power point compiling block space index mechanism, and realizing quick loading and display of three-dimensional model data of the transformer substation;
the area threshold-based substation three-dimensional model geometric collaborative texture automatic simplification method simplifies the three-dimensional models of all substations to obtain a fine power substation three-dimensional model, and the method comprises the following steps:
analyzing the original three-dimensional models of the power transformer substations in different formats, traversing each triangular surface of the original three-dimensional models of the power transformer substations, and calculating the area of each triangle;
sequencing all triangular surfaces of the original three-dimensional models of all the power substations according to the size of the area to obtain a triangular list of the original three-dimensional models of all the power substations, and calculating an area threshold;
the area threshold calculation formula is as follows:
wherein: n is the number of triangular faces S i For each triangular surface area, delta is a small valueAt the empirical threshold of 1, Δs is the area threshold of the substation model;
traversing a triangle list of the original three-dimensional model of each power transformer substation, and deleting the triangle if the area of the triangle is smaller than an area threshold value;
reconstructing indexes for the three-dimensional model of the power transformer substation after deleting the triangular surface according to the vertex position and the index information of the three-dimensional model of the original power transformer substation, and outputting a fine three-dimensional model of the power transformer substation according to corresponding texture images and coordinate information;
and splicing textures of the model based on a least horizontal line preferred insertion algorithm, arranging the triangular surface textures in a descending order according to an area preferred principle, and carrying out optimized combination and merging to generate one texture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251991.2A CN112328722B (en) | 2020-11-11 | 2020-11-11 | Rapid loading method and system for three-dimensional GIS and model data of power substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011251991.2A CN112328722B (en) | 2020-11-11 | 2020-11-11 | Rapid loading method and system for three-dimensional GIS and model data of power substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112328722A CN112328722A (en) | 2021-02-05 |
| CN112328722B true CN112328722B (en) | 2024-03-26 |
Family
ID=74318911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011251991.2A Active CN112328722B (en) | 2020-11-11 | 2020-11-11 | Rapid loading method and system for three-dimensional GIS and model data of power substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112328722B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113793411A (en) * | 2021-05-24 | 2021-12-14 | 北京建筑大学 | Data organization and dynamic expression method based on linear reference |
| CN115984457A (en) * | 2022-12-02 | 2023-04-18 | 北京百度网讯科技有限公司 | Three-dimensional model display method and device and electronic equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020066495A (en) * | 2001-02-12 | 2002-08-19 | 한국전자통신연구원 | Object oriented management method and system for visual control of 3-dimensional complex geographic information |
| CN106156376A (en) * | 2015-03-26 | 2016-11-23 | 国家电网公司 | A kind of UHV transmission line electromagnetic interference Three-dimensional Simulation System |
| CN110990919A (en) * | 2019-11-25 | 2020-04-10 | 西南交通大学 | Three-dimensional GIS route selection design analysis method for urban rail transit |
| CN110992469A (en) * | 2019-11-29 | 2020-04-10 | 四川航天神坤科技有限公司 | Visualization method and system for massive three-dimensional model data |
| CN111881552A (en) * | 2020-06-24 | 2020-11-03 | 国家电网有限公司 | Three-dimensional GIS system with power grid information and geographic information fused |
-
2020
- 2020-11-11 CN CN202011251991.2A patent/CN112328722B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020066495A (en) * | 2001-02-12 | 2002-08-19 | 한국전자통신연구원 | Object oriented management method and system for visual control of 3-dimensional complex geographic information |
| CN106156376A (en) * | 2015-03-26 | 2016-11-23 | 国家电网公司 | A kind of UHV transmission line electromagnetic interference Three-dimensional Simulation System |
| CN110990919A (en) * | 2019-11-25 | 2020-04-10 | 西南交通大学 | Three-dimensional GIS route selection design analysis method for urban rail transit |
| CN110992469A (en) * | 2019-11-29 | 2020-04-10 | 四川航天神坤科技有限公司 | Visualization method and system for massive three-dimensional model data |
| CN111881552A (en) * | 2020-06-24 | 2020-11-03 | 国家电网有限公司 | Three-dimensional GIS system with power grid information and geographic information fused |
Non-Patent Citations (3)
| Title |
|---|
| 光伏电站可视化管理系统的研究与实现;邵艳;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;第2~5章 * |
| 移动终端下电力三维GIS系统关键技术及实现;龚治兴;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》;移动终端下电力三维GIS系统关键技术及实现 * |
| 龚治兴.移动终端下电力三维GIS系统关键技术及实现.《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》.2020,移动终端下电力三维GIS系统关键技术及实现. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112328722A (en) | 2021-02-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104766366B (en) | A kind of method for building up of three-dimension virtual reality demonstration | |
| CN101963996B (en) | Global raster data storing method | |
| CN112328722B (en) | Rapid loading method and system for three-dimensional GIS and model data of power substation | |
| CN113593051B (en) | Live-action visualization method, dam visualization method and computer equipment | |
| KR20100136604A (en) | Real-time visualization system of 3 dimension terrain image | |
| CN109872390B (en) | Organization method of massive three-dimensional models | |
| CN103279983A (en) | China Tang dynasty style historic building modeling method | |
| CN103309943A (en) | Three-dimensional geographic information platform and topographic data processing method thereof | |
| CN105354882A (en) | Method for constructing big data architecture based three-dimensional panoramic display platform for large-spatial-range electricity transmission | |
| CN114820990B (en) | Digital twin-based river basin flood control visualization method and system | |
| KR20150124112A (en) | Method for Adaptive LOD Rendering in 3-D Terrain Visualization System | |
| CN105741340B (en) | A kind of transmission line of electricity three-dimensional scenic emulation mode and system for web page display | |
| GB2622666A (en) | Three-dimensional virtual ecological environmental visualization integration and optimization system for large region | |
| CN106683183B (en) | A kind of online three-dimensional visualization method of construction project model | |
| Kumar et al. | A CityGML extension for handling very large TINs | |
| CN103729800A (en) | Water conservancy planning system | |
| Xie | Application of computer simulation virtual reality simulation technology in the statistical analysis of urban building communities | |
| CN106875480B (en) | Method for organizing urban three-dimensional data | |
| CN113495935A (en) | Terrain slicing method and system based on irregular triangularization mesh generation | |
| Gruber et al. | Urban data management—A modern approach | |
| shiyun | Level of detail optimization for real-time terrain | |
| Schilling | 3D Spatial Data Infrastructures for Web-Based Visualization | |
| CN111028332B (en) | Construction method and display method for power grid model | |
| CN117456123B (en) | Method for generating digital elevation model based on point data | |
| Chen | Construction of a Large Visual Landscape Design Platform considering Low-Carbon Environmental Protection Based on Nanomaterials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |