38 results about "Digital Earth" patented technology

The embodiment of the invention provides a multi-modal virtual-real interaction sand table display method and device, and the method comprises the steps: constructing a multi-modal virtual-real interaction sand table based on a digital earth through a digital twinning technology and an MR / VR / AR technology in combination with an entity sand table, and according to a spatial position identification code generated by the real-time image information of the earth entity sand table, carrying out hierarchical pose adjustment on the earth virtual sand table, so that the pose of the earth virtual sand table and the pose of the earth entity sand table are completely matched with a visual angle, and obtaining a virtual-real fused sand table. According to a multi-stage scene architecture and a mixed rendering pipeline, virtual-real fusion rendering is carried out on the sand table to obtain a virtual-real rendering sand table, multi-player thought collaborative interaction is realized by combining multi-form interaction means such as a keyboard, an operating lever, a handle, gestures, voice and a laser pen, and when a user changes a viewport, the virtual-real rendering of the sand table is realized. And displaying the sub-scene content according to the scene streaming radius. According to the application, the efficiency and flexibility of display and interaction of the multi-modal virtual-real interaction sand table can be improved.

The invention discloses an intelligent alarm positioning method and system based on an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle monitoring and geographic space information processing, and the method comprises the steps: obtaining a video stream in real time based on the unmanned aerial vehicle, and recognizing a risk point location in a video image; a three-dimensional space positioning model is constructed based on telemetry data and lens angle parameters acquired by the unmanned aerial vehicle in real time. And performing three-dimensional coordinate dynamic solution on the risk point location based on a three-dimensional space positioning model to obtain a world coordinate of the risk point location. And determining and outputting an alarm position of the risk point location based on the world coordinates. An automatic detection and artificial interaction dual-channel mechanism is adopted, an alarm target is accurately identified and positioned in an unmanned aerial vehicle real-time video, a corresponding relation between video pixels and geographic coordinates is established through real-time registration of an unmanned aerial vehicle image and the digital earth, a space coordinate conversion error caused by view angle difference is corrected by using a depth map, and an alarm target is accurately identified and positioned. Accurate conversion from video pixel coordinates to world coordinates is realized, and high-precision positioning support is provided for remote monitoring of the unmanned aerial vehicle.

The invention provides a forest canopy three-dimensional height evaluation method and device based on canopy structure connectivity, and relates to the technical field of monitoring three-floor canopy height by laser radar. The method comprises the following steps: acquiring forest point cloud three-dimensional data of a target area acquired in real time through an unmanned aerial vehicle laser radar; preprocessing is carried out, and a digital elevation model (DEM) and a digital earth surface model (DSM) of the target area are generated; generating a canopy height model CHM by calculating a difference value between the DSM and the DEM; calculating an optimal path of each grid of the CHM from a starting point to a target point based on a Dijkstra algorithm according to a cost curved surface generated by the CHM; and according to the optimal path, obtaining a canopy structure connectivity value, namely a CSC value, of each canopy unit by calculating the connectivity between each node of the CHM and the height of the similar canopy unit, thereby obtaining a forest canopy three-dimensional height model based on CSC value spatial distribution for further analysis and evaluation. According to the method, by calculating the CSC, the spatial heterogeneity of the forest canopy structure and the influence of the spatial heterogeneity on the ecological process are comprehensively analyzed.

The invention relates to the technical field of photogrammetry, in particular to an earthwork measuring and calculating system based on an unmanned aerial vehicle surveying and mapping technology, which comprises a BIM (Building Information Modeling) route partitioning module, a point cloud quality evaluation module, a digital earth surface model generation module and an earth volume measuring and calculating module. According to the method, by analyzing geometric parameters such as gradient and curvature of a designed curved surface, intelligently partitioning and optimizing an unmanned aerial vehicle surveying and mapping route, and executing independent density clustering on point cloud data streams according to route partitions, dynamic evaluation and marking of spatial data quality are realized, and vegetation point clouds are removed in combination with image color information; the method comprises the following steps: correcting data by using an abnormal mark of quality evaluation, generating an accurate digital earth surface model, finally carrying out elevation deviation comparison on the accurate digital earth surface model and a designed curved surface, finely calculating the earth volume through a regular grid, and carrying out statistical analysis by using a root mean square error, thereby improving the accuracy and reliability of a measurement result.

The present invention proposes a method for managing three-dimensional spatial scenes of a digital earth compatible with Beidou grid codes. First, based on Beidou grid codes, a Beidou grid space bounding box is defined, and its coding method is given; then, an intuitive and convenient intersection test method for the Beidou grid space bounding box is given; finally, for each object, the smallest Beidou grid space bounding box that can contain the object is found, and a hierarchical bounding box of the Beidou grid space with an R-tree structure that takes into account the polar regions is established step by step. Based on this R-tree structure, efficient spatial search can be achieved, which is particularly suitable for the spatial positions defined by Beidou grid codes.

The invention discloses a high canopy density forest single tree segmentation method, device, medium and equipment, based on a gradient directivity map and a multi-scale seed point extraction method, firstly, a digital earth surface model is used for counting directivity of a neighborhood point cloud local gradient vector, the gradient directivity map is generated to replace CHM for crown segmentation, and the method is not affected by terrain; then, preferably using a multi-scale window to extract real tree vertexes from the gradient pointing map, and iteratively screening the real tree vertexes and deleting wrong tree vertexes according to geometric features among tree crowns, thereby effectively inhibiting over-segmentation and under-segmentation phenomena, and remarkably improving the individual tree segmentation precision; and finally, a segmentation method combining water flow path segmentation and post-processing is adopted, so that wrong segmentation results possibly generated by the watershed algorithm on the overlapped crowns in the same height interval are reduced.

The invention relates to the field of remote sensing information extraction, and discloses a multi-scale iterative extraction method and device for tree vertexes, a medium and equipment, and the method comprises the steps: employing at least two windows of different scales to extract a gradient directivity map of a target forest or a local maximum value of a canopy height model, and determining the repeated points as real tree vertexes and the remaining points as candidate points, and iteratively screening the real tree vertexes from the candidate points according to the inter-crown geometric features of the target forest in combination with a gradient directivity map, a digital earth surface model and the like until a preset iteration ending condition is met. According to the method, the rest tree vertexes are searched gradually and iteratively from the real tree vertexes according to the geometric features between the tree crowns, and the wrong tree vertexes are deleted, so that the over-segmentation and under-segmentation phenomena are effectively inhibited, and the individual tree segmentation precision is remarkably improved.

The invention discloses a bionic air-space cooperative atmosphere intelligent regulation and control system and method. The system comprises a twin digital earth, an atmospheric brain, an air-space AI mobile base comprising a troposphere special base and a stratosphere special base, a plurality of macroscopic telescopic pipelines, an array composed of macroscopic intelligent sunshade reflectors, and a multifunctional intelligent micro-unit cluster. A regulation and control strategy is generated through multi-source data assimilation and intelligent strategy optimization, physical states such as temperature and humidity of air masses in a pipeline are actively adjusted through an environment control section in a macroscopic telescopic pipeline, and low-energy-consumption, stepped and directional transportation of cloud water substances is achieved by actively utilizing the chimney effect formed by the atmospheric environment; controllable adjustment of solar radiation input is achieved through dynamic management of the intelligent sunshade reflector array. The system has four operation modes which can be evolved according to technical capability stages from macroscopic direct intervention to global intelligent collaboration, and is configured with a module recovery and platform stability anchoring mechanism so as to realize emergency intervention on disastrous weather.

This application discloses a plug-in-based method and apparatus for loading network digital earth data, including acquiring network digital earth data and user data; classifying the network digital earth data to obtain default data types and acquiring custom data types corresponding to the user data; writing default data plugins for the default data types and custom data plugins for the custom data types according to pre-defined data plugin writing specifications; and uploading the default data plugins and custom data plugins to a server so that the server adds the default data plugins and custom data plugins to a data plugin list. This application, based on data plugin writing specifications, writes data plugins corresponding to data types and uses a data plugin mechanism to dynamically load data, which can meet the needs of users to customize data plugins and improve the flexibility and breadth of data loading methods in the network digital earth system.

The invention discloses a three-dimensional meteorological display method and system based on the digital earth, and belongs to the technical field of meteorological display, and the method comprises the steps: setting a meteorological source information table; identifying a meteorological data source in the meteorological source information table, and configuring a corresponding data processing mode for the meteorological data source; collecting meteorological data of the meteorological data source in real time, and processing the meteorological data according to a preset data processing mode to obtain basic display data; setting a meteorological model establishment method, obtaining basic display data, and setting a meteorological model according to the meteorological model establishment method and the basic display data; integrating the meteorological model with the digital earth to obtain a meteorological display model; identifying each interaction function corresponding to the meteorological display model, and setting corresponding function matching information and function interaction modes for the interaction functions; real-time interaction with a user is carried out through the interaction unit, user interaction information is obtained, a function interaction mode is determined according to the user interaction information, and interaction with the user is carried out according to the function interaction mode.

The invention discloses a digital earth roaming animation generation method, tool and device based on an unreal engine, and relates to the technical field of geographic information systems.The digital earth roaming animation generation method comprises the steps that an observation target of a digital earth roaming animation is determined, a preset manipulator is adopted, the observation target serves as the center, a camera is controlled to move, and the digital earth roaming animation is generated; the method comprises the steps of obtaining a key frame corresponding to each observation target, editing each key frame by adopting a preset editing panel to obtain sub-animations, connecting all the sub-animations to generate an initial animation, and interpolating every two sub-animations in the initial animation by adopting a preset interpolation algorithm to generate the digital earth roaming animation. According to the invention, the technical problem of low continuity of the digital earth roaming animation generated in the prior art is solved.

Provided are a WebGL-based satellite navigation augmentation service rendering method, a terminal device, a chip, a computer readable storage medium and a computer program product, relating to the technical field of satellite navigation simulation. The WebGL-based satellite navigation augmentation service rendering method comprises: initializing a digital earth; obtaining scene configuration information; analyzing scene objects based on the scene configuration information, the connection relationship between the scene objects comprising a first connection relationship and a second connection relationship; placing scene objects associated with the first connection relationship into a first update queue and placing scene objects associated with the second connection relationship into a second update queue; obtaining a rendering strategy for the scene objects; obtaining shader parameters based on the rendering strategy; rendering the scene objects in the first update queue using a first shader and rendering the scene objects in the second update queue using a second shader based on the shader parameters; and outputting pixels to a screen canvas.

The present invention discloses a large-scale water conservancy project management method and system based on GIS and BIM, including a three-dimensional digital earth system and a BIM system, characterized in that: the three-dimensional digital earth system supports cross-platform operation on multiple operating systems and has a topographic data export module and a BIM model import module; the BIM system supports a variety of BIM software, has a topographic data conversion plug-in, and has a topographic data import module and a BIM model export module. The advantages of the present invention are that it can achieve the deep integration of GIS terrain and BIM terrain. By importing high-precision topographic data into the three-dimensional GIS system, directly obtaining BIM topographic data from the GIS system, and then returning it to the GIS system after processing, the consistency of topographic data can be effectively guaranteed; moreover, the BIM topographic data can be converted into the standard terrain of the three-dimensional GIS, which is beneficial to the unified management of the three-dimensional GIS system. The coordinate conversion method provided by the present invention can meet the precise coordinate conversion of long-distance water conveyance projects and is beneficial to the deepening of the application of GIS and BIM fusion technology.

This invention discloses a method for accurately annotating multi-dimensional information on a 3D topographic and geological map, comprising the following steps: S1, obtaining a quadrilateral input by the user to determine the work area; S2, pasting a blank image texture onto the work area, naming the texture TEX1; S3, obtaining the color and stroke pixel width used for annotation input by the user; when the user holds down the mouse button and drags, drawing is performed on the texture TEX1 using the specified color and pixel width, then the drawn image texture is overlaid on a 3D digital globe, and finally displayed on the screen. The content drawn on the geological map by this invention accurately matches the map topography, is unaffected by map movement or scaling, and has excellent performance; even drawing massive amounts of content will not cause a performance degradation.

The invention discloses a digital earth high-performance rendering and multi-layer texture management method, which comprises the following steps: an initialization stage: performing classified management on each type of geographic texture resources required by the digital earth according to layers, creating independent virtual texture instances, and allocating corresponding page tables and physical page pools to realize multi-layer shared virtual texture mapping; in a frame rendering process, the GPU completes mapping from a virtual page to a physical page through a page table, realizes on-demand mapping and refreshing between a virtual space and a physical page pool by adopting an asynchronous on-demand scheduling mechanism, and executes sampling operation of corresponding physical textures of each layer on the physical page pool; acquiring access feedback virtual texture data of a part of screen blocks or layers by adopting a framing and blocking feedback sampling mechanism, and writing the access feedback virtual texture data into a feedback buffer area; and when the frame ends, the CPU analyzes and accesses the feedback virtual texture data, updates the physical page pool and the page table, and synchronizes the latest result to a GPU rendering pipeline, and the GPU mixes the sampling results of each layer, so that the rendering performance is improved.

The invention discloses a low-altitude economic multi-source heterogeneous data fusion management system based on the digital earth, and relates to the technical field of airspace management. Comprising a data receiving module used for receiving and analyzing multi-source heterogeneous real-time streaming data; the space-time cube engine module is used for carrying out space-time modeling on a low-altitude management airspace through voxelization construction, dynamic maintenance and intelligent data mapping under a geocentric coordinate system of the digital earth; the parallel fusion calculation module is used for carrying out parallel calculation on density calculation, conflict detection and environmental influence analysis tasks through a distributed cluster based on a space-time cube and outputting a management situation and an alarm event; the digital earth visualization and service module is used for generating a dynamic situation map; by constructing the dynamic space-time cube, the technical problems that multi-source data fusion is difficult and situation awareness is not visual in the low-altitude environment are solved, and intelligent management of low-altitude economy is achieved.

The invention belongs to the technical field of monitoring, and discloses a safety risk monitoring and early warning method and system based on a digital earth map, and the method comprises the steps: obtaining pedestrian video information monitored by a plurality of sampling points in a preset region, and determining the motion track of each pedestrian based on the pedestrian video information; integrating the movement tracks of the pedestrians in a pre-constructed digital earth map of a preset area to obtain a track digital map, dividing the digital earth map into a plurality of map areas, and visually displaying the track digital map in each map area; determining a congestion density within each map area in a future period based on the trajectory digital map; based on the crowding density in each map area in the future time period, constructing a people flow safety level of each map area; and when the people flow safety level of any map area reaches the risk level, generating risk early warning information. The method has a good display effect and can accurately predict the people flow of the whole region.

The application discloses a kind of based on spatial data mining and geological constraint seismic activity fault model construction method, system, equipment and medium.The method is first arranged and analyzed to seismic data, extracts minimum complete subdirectory;Using improved mean shift algorithm for spatial clustering, identify each active fault corresponding small earthquake cluster;Subsequently, each fault cluster is three-dimensional slice, and least square method fitting is generated fault interpretation line;With interpretation line as foundation, initial seismic activity fault three-dimensional model is constructed, and is optimized by multi-source geological constraint, and active fault three-dimensional fine model is obtained;Finally, the model is integrated with digital earth spatial registration.This application can realize the whole process automation and quantization from seismic data analysis to active fault three-dimensional fine model construction and application, improve the objectivity, efficiency, precision and reliability of model construction, provide important technical support for seismic disaster risk assessment, active fault detection.

This invention provides a data synchronization method, apparatus, electronic device, and storage medium based on a situational digital earth, belonging to the field of data synchronization technology. The method includes: acquiring data to be synchronized; wherein the data to be synchronized includes business layer result data, network layer connectivity data, and information layer flow data; determining related data belonging to the same business task in the data to be synchronized based on a business task identifier; wherein the business task identifier is generated when the business is created; and performing timestamp alignment processing on the related data to obtain synchronized data. This invention, by performing timestamp alignment processing on related data for the same business task, ensures that the three layers of data with the same business task identifier are not affected by data from other tasks, which helps reduce data synchronization errors and thus improves the synchronization display effect of multi-layer data in a situational digital earth.

The application belongs to the technical field of data storage, and discloses a distributed digital earth data storage method and system, which comprises the following steps: obtaining digital earth data; preprocessing and cutting the digital earth data to obtain fragmented data; performing space-time coding on the fragmented data to obtain coded fragmented data; constructing a distributed hierarchical storage space and storing the coded fragmented data in the corresponding distributed hierarchical storage space; and constructing an index of the fragmented data in the distributed hierarchical storage space. The storage method can improve the loading speed of the digital earth data. The space-time coding of the fragmented data makes each piece of fragmented data have high space-time correlation, which can improve the speed of continuous space-time range data and further improve the loading speed of the digital earth data. Furthermore, the construction of the distributed hierarchical storage space can reduce the storage cost of the data and improve the storage reliability of the data.

The invention discloses a holographic digital earth sand table construction method, a holographic digital earth sand table construction device and electronic equipment, and relates to the technical field of digital earth visualization, and the construction method comprises the following steps: constructing a digital earth system by adopting a preset plug-in in an unreal engine, decomposing a three-dimensional scene of the digital earth system, and obtaining a three-dimensional scene of the digital earth system; the method comprises the steps of obtaining a background rendering picture and a holographic rendering picture, determining a to-be-displayed interface picture, decomposing the interface picture to obtain a background interface picture and a holographic interface picture, generating a bottom background image and a back background image based on the background rendering picture and the background interface picture, and generating a back background image based on the holographic rendering picture and the holographic interface picture. And generating a holographic window image, and displaying the bottom background image, the rear background image and the holographic window image by adopting holographic display equipment so as to carry out holographic display of the digital earth sand table. According to the invention, the technical problem that holographic display of a digital earth sand table with a real physical depth of field cannot be realized indoors in the prior art is solved.

The application discloses a loading method and device of a digital earth, apparatus and a storage medium. The method comprises the following steps: acquiring the distance from a camera to a target tile and the interval corresponding to the distance; the interval is in a positive correlation with the distance; each interval corresponds to a level of tile, and the level of the tile is in a positive correlation with the accuracy of the tile; in response to the interval corresponding to the distance from the camera to the target tile changing from the nth interval to the nth-p interval, using the target tile of the nth+p level in the storage space to cover the target tile of the nth level; wherein n-p is a positive integer, n is an integer greater than or equal to 3, and p is an integer greater than or equal to 2. The application embodiment omits the covering process of the intermediate level tile, does not need the storage space of the apparatus to store all levels of tiles, reduces the requirement of the digital earth loading on the hardware apparatus, improves the display effect of the digital earth for the apparatus with relatively low storage space.

1. Name of the product in this design: Graphical User Interface for Computers with StarMap Cloud Developer Platform Data. 2. Purpose of this design: This design is used to run the StarMap Cloud Developer Platform processing program and display data information. The display screen panel is used with a computer. 3. The key design features of this product are shown in Figure 3, which illustrates the changing state of the interface. 4. Images or photos that best illustrate the design points: Interface change state diagram 3. 5. As is customary in computer design, rear view, left view, right view, top view, and bottom view are omitted. 6. Purpose of the graphical user interface: Used for data access, algorithm invocation, page design, data model design, logic orchestration and application deployment in the TuYun developer platform program. 7. The area of ​​the graphical user interface in the product: the entire area of ​​the computer screen. 8. Human-computer interaction method of graphical user interface: Users can perform different functions by clicking different areas or icons displayed on the interface with the mouse. 9. Description of the changing states of the graphical user interface: The main view is the initial page of the developer platform. Click the "Digital Earth Component" in the left toolbar, click "Earth" and drag it to the canvas, and set the percentage full screen from the top toolbar. The information display method is shown in Figure 1, which shows the interface change state. Based on state diagram 1, click "Built-in Resources" in the left toolbar, then click "Interface" and "Background Image" in sequence and drag them to the canvas. Click the basic toolbar components, select "Text" and add it to the canvas. Edit the text to "Digital Earth". Adjust the size and position of the text and background image. The information display method is shown in state diagram 2. Based on state diagram 2, click "Chart Components" in the left toolbar, then drag "Column Chart" → "Stacked Bar Chart", "Pie Chart" → "Gallery Chart" to the canvas and adjust their positions. The information display method is shown in state diagram 3. Based on state diagram 3, click "Plugins" in the left toolbar, drag "Plotting" to the canvas and adjust its position. Its information is displayed as shown in state diagram 4 of the interface change. Based on state diagram 4, clicking "Preview" in the upper right corner will display information as shown in state diagram 5. Based on state diagram 5, click "New", "Basic Element", "Point", "Scan Wave" in sequence and add it to the target location on the middle map. The information is displayed as shown in state diagram 6.

The invention discloses a dynamic fusion analysis method and system for space-time action trajectory data and a digital earth. The method comprises the following steps: performing metadata extraction and multi-definition transcoding on original video data, and embedding trajectory data; performing timestamp dynamic allocation and three-dimensional coordinate conversion on the trajectory data; establishing accurate space-time alignment of a video frame and a track point, and realizing millisecond-level matching and linkage of a video, a vehicle position and a digital earth visual angle through time axis hard synchronization, track interpolation and dynamic visual angle synchronization; and performing driving behavior analysis based on the synchronized trajectory data. According to the method, the problems of difficulty in dynamic association of track data, maps and videos and process fragmentation are solved, full-process automation and high-precision space-time synchronization are realized, and powerful technical support is provided for scenes such as driving behavior analysis and accident reconstruction.

The embodiment of the invention provides a field path planning method and device based on a digital earth surface model. The field path planning method comprises the following steps: acquiring earth surface data in a field preset area; establishing a digital earth surface model according to the acquired earth surface data in the field preset area; and performing path planning on a preset starting point and a preset ending point by using a field path planning algorithm and utilizing the gradient data and the earth surface obstacle data of the digital earth surface model to obtain an optimal field path from the starting point to the ending point. The path in the field seismic exploration process is planned, so that the path searching process in the field environment is efficient, the resource waste in the seismic exploration process is reduced, and the seismic exploration time is saved.

The invention belongs to the technical field of data storage, and discloses a distributed digital earth data storage method and system, and the method comprises the steps: obtaining digital earth data; preprocessing and cutting the digital earth data to obtain fragmented data; performing space-time coding on the fragmented data to obtain coded fragmented data; constructing distributed hierarchical storage spaces, and storing the encoded fragmented data in the corresponding distributed hierarchical storage spaces; and constructing an index of the fragmented data in the distributed hierarchical storage space. According to the storage method, the loading speed of the digital earth data can be increased; space-time coding is carried out on the fragmented data, so that each piece of fragmented data has relatively high space-time strong relevance, the continuous space-time range data speed can be improved, and the loading speed of digital earth data is further improved; and secondly, by constructing the distributed hierarchical storage space, the storage cost of the data can be reduced, and the storage reliability of the data can be improved.

The invention belongs to the technical field of digital earth, and discloses a secure storage method and system for digital earth data. The method comprises the following steps: a ground data station collects real-time digital earth data, preprocesses and encrypts the data, and uploads the data to a cloud data center; the cloud data center carries out decryption, constructs a real-time digital twinborn model and extracts real-time metadata; the cloud data center performs data analysis by using a data analysis model according to the real-time digital twin model to obtain a real-time data analysis result; the cloud data center generates a secure storage scheme by using a secure storage scheme generation model according to the real-time data analysis result to obtain a real-time secure storage scheme; and the cloud data center performs encryption and distributed storage on the real-time metadata according to the real-time secure storage scheme. The problems of insufficient data storage security, low data processing efficiency and poor storage scheme flexibility in the prior art are solved.

This invention relates to a method for visualizing coverage areas, specifically a method for visualizing the coverage area of ​​a cluster of BeiDou navigation satellites. The method includes: S1, acquiring ephemeris data; S2, calculating the nadir points of the BeiDou navigation satellites; S3, calculating all coverage boundary points of the BeiDou navigation satellites, fitting the data to form the coverage area of ​​the BeiDou navigation satellites; S4, obtaining the coverage areas of all BeiDou navigation satellites; S5, dividing the digital file of the Earth into multiple grid regions; S6, obtaining the coverage amount of each grid region; and S7, coloring the three-dimensional digital Earth according to the coverage amount of each grid region based on a mapping relationship, thereby visualizing the coverage area of ​​the cluster of BeiDou navigation satellites. This invention combines the calculation of the coverage area of ​​clustered BeiDou navigation satellites with three-dimensional visualization, enabling the calculation and visualization of the coverage area of ​​clustered BeiDou navigation satellites within any given time period, which helps in estimating the orbital trajectory of the clustered BeiDou navigation satellites.

The invention discloses a real-time low-altitude augmented reality method fusing an unmanned aerial vehicle view and a digital earth, and the method comprises the steps: a), managing and issuing geographic space data, which is used for issuing the geographic space data required to be loaded in a flight task to an unmanned aerial vehicle mobile terminal control device; b) application initialization and geometric consistency establishment, which are used for initializing applications and unifying coordinate systems and extrinsic parameters of a digital earth three-dimensional vision engine and an unmanned aerial vehicle camera; c) rendering the geospatial data for superposing and rendering the geospatial data required by the flight task into an image transmission interface; d) calculating a correction parameter for resolving an error between the geographic space data rendering position and the real ground object position of the camera; e) correcting scene errors; the method is used for applying the settled homography matrix to a digital earth three-dimensional vision engine view for real-time correction. According to the method, the low-altitude geographic information visualization and real-time interaction capability is remarkably improved, and the method has wide application prospects and popularization value.

The invention discloses an urban infrastructure system simulation system and method based on a digital earth platform, and the method comprises the steps: breaking barriers among infrastructure simulation models through a joint simulation coordination engine, and achieving the cross-domain co-simulation and time synchronization; the fusion problem of multi-source heterogeneous data is solved through a unified space-time big data management platform; and abstract simulation data and a real geographic space are closely combined through a digital earth visualization engine, so that live-action and immersive visualization of a simulation process and a simulation result are realized. According to the invention, 'sand table deduction 'can be carried out on an urban infrastructure system, potential multi-dimensional influences of emergencies or major policies are effectively evaluated, and scientific decision support is provided for urban planning, emergency management and the like.