A Geographic Information Offline Management System

Abstract

The present invention discloses a geographic information offline management system, which relates to the field of geographic information technology and includes a parameter setting module, a data acquisition module, a data fusion module, a point of interest construction module, a dynamic event storage module, a dynamic display module, and a query module; the parameter setting module receives map setting data and data addresses; the data acquisition module collects remote sensing image data and geographic information data according to the data addresses; the data fusion module fuses the remote sensing image data and the geographic information data; the point of interest construction module receives point of interest information; the dynamic event storage module constructs dynamic events according to the map setting data and the point of interest information for storage and transmits them to the dynamic display module; the query module receives a query instruction, searches for relevant data and feeds it back to the dynamic display module; the dynamic display module dynamically displays the map image and relevant data. The present invention can realize the offline construction and dynamic display of geographic information.

Description

Technical Field

[0001] The present invention relates to the field of geographic information technology, and more specifically to a geographic information offline management system. Background Art

[0002] With the rapid development of Geographic Information System (GIS) technology, the demand for offline construction and dynamic display of geographic information in key areas is increasing day by day. However, for existing commercial GIS map services, the costs of map data purchase, post-maintenance, and customization and modification are high. They cannot provide customized modification of map data according to the specific requirements of projects, and have poor integration with map data of other open-source data. At the same time, after purchasing a GIS map service, the deployment of the map service is cumbersome, requiring investment in server-side development and professional technical support and maintenance; during business development, it is also necessary to develop based on the SDK of the commercial GIS map, and an out-of-the-box mode is not provided to meet the actual business requirements of rendering maps. Moreover, existing commercial GIS map services cannot meet user needs such as offline map browsing and offline navigation in specific environments.

[0003] Therefore, how to achieve offline construction and display of maps, as well as fast and convenient map editing, is an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a geographic information offline management system, which can achieve offline construction and dynamic display of geographic information, perform map editing and data fusion, and meet the offline needs of users.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A geographic information offline management system includes a parameter setting module, a data acquisition module, a data fusion module, a point of interest construction module, a dynamic event storage module, a dynamic display module, and a query module;

[0007] The parameter setting module receives map setting data and a data address;

[0008] The data acquisition module collects remote sensing image data and geographic information data according to the data address;

[0009] The data fusion module fuses the remote sensing image data and the geographic information data to obtain fused geographic data;

[0010] The point of interest construction module receives point of interest information;

[0011] The dynamic event storage module constructs and stores dynamic events according to the map setting data and the point of interest information, and transmits them to the dynamic display module;

[0012] The query module receives query instructions, searches for relevant data, and feeds it back to the dynamic display module;

[0013] The dynamic display module receives and dynamically displays fused geographic data, dynamic events, and relevant data.

[0014] Preferably, the map setting data includes the maximum and minimum value ranges of key area geographic information and dynamic display parameters; the data address is the network address for collecting remote sensing image data and geographic information data.

[0015] The maximum and minimum value ranges include: longitude and latitude range, altitude range, and level range; the dynamic display parameters include: dynamic display time range, dynamic display time step, dynamic display time step unit, longitude and latitude of the screen center, and altitude of the screen center;

[0016] The source of the remote sensing image data is the public address of the remote sensing satellite remote sensing image data, and the source of the geographic information data is the data of Amap, Baidu Map, or other open-source map data.

[0017] Preferably, the data fusion module performs data structure conversion, data registration between different data sources, and data overlay according to the fusion criteria to obtain fused geographic data; for data structure conversion, the format of the remote sensing image data and the geographic information data is converted, and the remote sensing image can be converted into vector data or raster data so that the two can match and interact with each other; for data registration between different data sources, the coordinate system of the remote sensing image data and the geographic information data from different sources is unified and geometric correction is performed to ensure the consistency of the spatial position and geometric relationship of the data; for data overlay, the remote sensing image data and the geographic information data are overlaid and displayed to achieve data visualization and analysis. Through the overlay of the remote sensing image data and the vector data, the texture display of the vector data can be realized, or through the overlay of the remote sensing image and the raster data, the texture display of the raster data can be realized;

[0018] The fusion criteria include: spatio-temporal consistency, the fused data should have consistent characteristics in the time domain and spatial domain for accurate information extraction and analysis; feature complementarity, making full use of the feature complementarity of different bands and sensors so that the fused data contains more comprehensive and accurate information; data consistency, the fused data should not change the true information of the original data and remove factors such as noise and image distortion.

[0019] Preferably, the dynamic display module displays the map image and relevant data and is provided with an editing menu;

[0020] The map image includes dynamic events and fused geographic data; the relevant data includes attribute information, legends, and point-of-interest related data; the editing menu includes functions such as cropping, zooming, panning, selection, double-speed playback, fast forward, and pause.

[0021] The fused geographic data includes integrated raster images and vector graphics; the display mode of remote sensing image data is raster images; the display mode of geographic information data is vector graphics.

[0022] The cropping method is to crop according to the longitude and latitude range, and the scaling method is to scale according to the level; the data related to points of interest includes unique identifier, image address, longitude, latitude, altitude, start time, and end time.

[0023] Preferably, the point-of-interest construction module receives the point-of-interest information uploaded by the user, adds, deletes, and modifies points of interest according to the point-of-interest information, so as to adjust dynamic events; the point-of-interest information includes longitude, latitude, display chart, name, description, data source, and other relevant information; when comparing the currently received point-of-interest information with the historical point-of-interest information, if the data increases, an increase adjustment of the point of interest is performed, if the data decreases, a deletion adjustment of the point of interest is performed, and if the data quantity remains unchanged but the value changes, a modification adjustment of the point of interest is performed.

[0024] Preferably, the dynamic event storage module indexes and stores according to the point-of-interest information at the time step of dynamic display to generate dynamic events.

[0025] Preferably, the query module retrieves the corresponding map image, dynamic events, and relevant data according to the input instruction and transmits them to the dynamic display module for display.

[0026] Preferably, a Bezier curve is used to smooth the route in the map image to improve the readability and visualization effect of the route.

[0027] Preferably, when reaching the start time of the dynamic display time range, the map image is dynamically displayed according to the preset points, and when the user observes the point of interest, the chart of the point of interest is dynamically scaled according to the virtual visual height and the preset scaling constraint; when reaching the end time of the dynamic display time range, the dynamic display ends.

[0028] Preferably, the scaling constraint includes calculating the scaling ratio according to the difference between the virtual visual height when the user observes the point of interest and the preset standard height within the preset size range, and calculating the size of the icon rendering according to the scaling ratio. The icon of the point of interest is dynamically scaled according to the perspective characteristics of near-big-and-far-small in the user's view.

[0029] Through the above technical solutions, compared with the prior art, the present invention discloses a geographic information offline management system, which can realize the offline construction and dynamic display of geographic information in key areas, and has the following beneficial effects:

[0030] ① Map data can be freely downloaded and edited through an open-source GIS editor and OSM database;

[0031] ② It is possible to perform secondary editing on the downloaded map data, customize and beautify the map data to adapt to scenarios such as tactical deduction, route navigation, and data dashboards;

[0032] ③ Adopt open-source solutions to reduce the cost of commercial map data and achieve efficient data fusion through open-source tools;

[0033] ④ Customize key areas, specifically minimize the map range, and improve the rendering accuracy;

[0034] ⑤ Support the fusion of multi-source data such as GPS and aerial images, and increase POI points and elevation rendering;

[0035] ⑥ Generate map rendering and navigation data to meet the needs of offline rendering and navigation;

[0036] ⑦ Through the out-of-the-box rendering API, support offline map rendering technology to meet business requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0038] Figure 1 It is a schematic structural diagram of a geographic information offline management system provided by the present invention;

[0039] Figure 2 It is a schematic diagram of icon scaling from a ground perspective provided by the present invention;

[0040] Figure 3 It is a schematic diagram of icon scaling from a sky perspective provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] Embodiments of the present invention disclose a geographic information offline management system, as Figure 1As shown in the figure, it includes a parameter setting module, a data acquisition module, a data fusion module, a point of interest construction module, a dynamic event storage module, a dynamic display module, and a query module; the parameter setting module receives map setting data and a data address; the data acquisition module collects remote sensing image data and geographic information data according to the data address; the data fusion module fuses the remote sensing image data and the geographic information data to obtain fused geographic data; the point of interest construction module receives point of interest information; the dynamic event storage module constructs and stores dynamic events according to the map setting data and the point of interest information, and transmits them to the dynamic display module; the query module receives a query instruction, searches for relevant data and feeds it back to the dynamic display module; the dynamic display module receives the fused geographic data, dynamic events and relevant data and performs dynamic display.

[0043] Furthermore, the map setting data includes the maximum and minimum value ranges of the geographic information of the key area and the dynamic display parameters; the data address is the network address for collecting remote sensing image data and geographic information data;

[0044] The definition of the key area is usually based on specific application requirements, research objectives or actual situations. For example, taking "military exercise" as an example, in a military exercise, the key area usually refers to a specific area, which is the main venue for military exercise and training activities; determination of the maximum and minimum value ranges: in a military exercise, the maximum and minimum value ranges may refer to the maximum and minimum ranges of the geographic area involved in the exercise; dynamic display time range: in a military exercise, the dynamic display time range usually refers to the duration of the exercise, that is, the time period from the start to the end of the exercise. The length of this time range depends on the scale and purpose of the exercise; the source of the remote sensing image data is the public address of the remote sensing satellite remote sensing image data, and the source of the geographic information data is the open source map data.

[0045] Furthermore, the maximum and minimum value ranges include: longitude and latitude range (min_lon, min_lat, max_lon, max_lat), for example: 111.92, 44.04, 112.43, 45.08; altitude range (min_alt, max_alt), for example: 0, 15000; level range (min_level, max_level), for example: 0, 10;

[0046] The dynamic display parameters include: dynamic display time range (start, end), for example: 2021-01-01 00:00:00, 2021-01-02 00:00:00; time step of dynamic display (step), for example: 1 hour; unit of time step of dynamic display (unit), for example: hour; longitude and latitude of the center of the screen (center_lon, center_lat), for example: 111.92, 44.04; altitude of the center of the screen (center_alt), for example: 500.

[0047] Furthermore, the data fusion module performs data structure transformation, data registration, and data superposition according to the fusion criteria to obtain fused geographic data;

[0048] For data structure transformation, the format of remote sensing image data and geographic information data is converted. The remote sensing image can be converted into vector data or raster data so that the two can match and interact with each other;

[0049] For data registration, the coordinate systems of remote sensing image data and geographic information data from different sources are unified and geometric correction is performed to ensure the consistency of the spatial positions and geometric relationships of the data;

[0050] For data superposition, the remote sensing image data and geographic information data are superimposed and displayed to achieve data visualization and analysis. Through the superposition of remote sensing image data and vector data, the texture display of vector data can be realized. Also, through the superposition of remote sensing images and raster data, the texture display of raster data can be realized;

[0051] The fusion criteria include: spatio-temporal consistency, where the fused data should have consistent characteristics in the time domain and spatial domain for accurate information extraction and analysis; feature complementarity, making full use of the feature complementarity of different bands and sensors so that the fused data contains more comprehensive and accurate information; data consistency, where the fused data should not change the true information of the original data and factors such as noise and image distortion are removed.

[0052] Furthermore, the dynamic display module displays map images and related data and is provided with an editing menu; the map images include dynamic events and fused geographic data; the related data includes attribute information, legends, and point-of-interest related data; the editing menu includes interactive functions such as cropping, zooming, panning, and selection, as well as functions such as double-speed playback, fast forward, and pause playback; the fused geographic data includes integrated raster images and vector graphics for fused display. The display mode of remote sensing image data is raster images; the display mode of geographic information data is vector graphics; the fused display mode of remote sensing image data and geographic information data is raster images and vector graphics; the cropping method is cropping according to the longitude and latitude range, and the zooming method is zooming according to the level; the point-of-interest related data includes unique identifier, image address, longitude, latitude, altitude, start time, and end time.

[0053] Furthermore, the point of interest construction module receives the point of interest information uploaded by the user, adds, deletes, and modifies points of interest according to the point of interest information, so as to adjust the dynamic event; the point of interest information includes longitude, latitude, display chart, name, description, data source, and other relevant information; when comparing the currently received point of interest information with the historical point of interest information, if the data increases, an addition adjustment of the point of interest is made, if the data decreases, a deletion adjustment of the point of interest is made, and if the data quantity remains unchanged but the value changes, a modification adjustment of the point of interest is made.

[0054] The uploaded point of interest information is as follows:

[0055] Longitude and latitude: lon, lat, for example: 112.192, 44.677; display icon: icon, for example: red circle; name: name, for example: Sunite Left Banner, Xilingol League; description and other information: desc, for example: county or city; data source: source, for example: Amap data; other relevant information, for example: phone number, address, business hours, etc.

[0056] Addition: The point of interest data newly added in the dynamic point of interest data;

[0057] Deletion: The point of interest data deleted in the dynamic point of interest data;

[0058] Modification: The point of interest data modified in the dynamic point of interest data.

[0059] Furthermore, the dynamic event storage module indexes and stores according to the point of interest information at the time step of dynamic display to generate dynamic events;

[0060] Index and store the data of the point of interest at the time step step: 1 hour of dynamic display, for example: 2021-01-01 00:00:00, 2021-01-01 01:00:00, 2021-01-01 02:00:00,... such step data, and store the display effect required for each time point.

[0061] Furthermore, the query module retrieves the corresponding map image, dynamic event, and relevant data according to the input instruction and transmits them to the dynamic display module for display; the relevant data returned is shown in Table 1 below:

[0062] Field Value Id Unique identifier 100 img Image address http: / / .......... lon Longitude 111.92 lat Latitude 44.04 height Height 10 startTime Start time 2024-05-0110:00:00 endTime End time 2024-05-0111:00:00

[0063] Provide query interfaces for point of interest information and dynamic events.

[0064] Furthermore, use Bezier curves to smooth the routes in the map image to improve the readability and visualization effect of the routes.

[0065] Further, when reaching the start time of the dynamic display time range, the map image is dynamically displayed according to the preset points. When the user observes the point of interest, the chart of the point of interest is dynamically scaled according to the virtual visual height and the preset zoom constraint. When reaching the end time of the dynamic display time range, the dynamic display ends. The icon of the point of interest can be scaled and displayed within a set range. When the display size of the point of interest caused by the map zoom level needs to exceed this boundary, the visual size of the icon will no longer increase or decrease further according to the scaling ratio of the scaling rule, but will remain at the final size when it reaches the scaling boundary.

[0066] Figure 2 The scaling ratio of the object that the human eye looks at on the ground is shown. It follows the rendering rule of "near is large and far is small". First, a standard value is determined. For example, when the human eye is 100m away from the object, the real object is 20m, and it is rendered as 50px (px: pixel) on the page. The scaling ratio Δp is calculated according to the height distance from the standard height. For example, when the human eye is 200m away from the object on the ground, calculate After that, calculate the rendered size of the object When the human eye is 50m away from the object on the ground, calculate Then calculate the rendered size of the object as 50px × 2 = 100px. Figure 3 The scaling ratio of the object that the human eye looks at in the sky is shown. Similarly, the scaling ratio Δp is calculated according to the height distance from the standard height. For example, when the human eye is 500m away from the object at a high place, calculate After that, calculate the rendered size of the object When the human eye is 1000m away from the object, calculate After that, calculate the rendered size of the object as 50px ×

[0067]

[0068] Dynamic display of offline map and point-of-interest data:

[0069] It is divided into vector rendering and raster rendering for hierarchical rendering according to the data type of the offline map. This step belongs to relatively static rendering. It is dynamically displayed according to the dynamic event data. This step belongs to relatively dynamic rendering. A timer is started during static rendering. When the next step size arrives, the data of the dynamic point of interest is obtained and compared with the existing point-of-interest data this time. According to "addition, deletion, modification", different types are analyzed for dynamic rendering. The icon of the point of interest can rotate the direction of the icon according to the distance difference and height difference between the coordinates of the previous and next times;

[0070] The types of dynamic rendering are divided into: addition: the point-of-interest data newly added in the dynamic point-of-interest data; deletion: the point-of-interest data deleted in the dynamic point-of-interest data; modification: the point-of-interest data modified in the dynamic point-of-interest data.

[0071] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method section.

[0072] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A geographic information offline management system, characterized in that: It includes parameter setting module, data acquisition module, data fusion module, point of interest construction module, dynamic event storage module, dynamic display module and query module; A parameter setting module receives map setting data and data address; Data acquisition module, collects remote sensing image data and geographic information data according to data addresses; The data fusion module fuses the remote sensing image data and geographic information data to obtain fused geographic data; The data fusion module performs data structure transformation, data registration and data superposition according to the fusion criteria to obtain fused geographic data; Data structure conversion: convert the formats of remote sensing image data and geographic information data, and convert remote sensing image data into vector data or raster data; data registration: unify the coordinates and perform geometric correction on remote sensing image data and geographic information data from different sources; data overlay: overlay and display remote sensing image data and geographic information data, and realize vector data mapping display by overlaying remote sensing image data and vector data, or realize raster data mapping display by overlaying remote sensing image data and raster data; fusion criteria include: spatiotemporal consistency, feature complementarity and data consistency; A point of interest building module receives information about points of interest; The dynamic event storage module constructs dynamic events according to the map setting data and the information of the points of interest for storage and transmits them to the dynamic display module; the dynamic events are indexed and stored according to the time step of the dynamic display according to the information of the points of interest, and the dynamic events are generated; The query module receives query instructions, searches for relevant data and feeds back to the dynamic display module; The dynamic display module receives fused geographic data, dynamic events and related data and displays them dynamically; displays map images, including dynamic events and fused geographic data; the fused geographic data includes integrated raster images and vector graphics, the remote sensing image data is displayed as raster images, and the geographic information data is displayed as vector graphics; the map image is dynamically displayed according to preset points, and when the user observes the point of interest, the icon of the point of interest is dynamically scaled according to the virtual visual height and the preset scaling constraints.

2. A geographic information offline management system according to claim 1, characterized in that: The map setting data includes the maximum value range and dynamic display parameters of the geographic information of key areas; the data address is the network address for collecting remote sensing image data and geographic information data.

3. A geographic information offline management system according to claim 1, characterized in that: Dynamically display module-related data and set up an editing menu; Related data includes attribute information, legends, and data related to points of interest; the editing menu includes cropping, zooming, panning, selecting, playing at double speed, fast forwarding, and pausing.

4. A geographic information offline management system according to claim 1, characterized in that: The POI construction module receives POI information uploaded by users, and adds, deletes and modifies POIs based on the POI information, thereby adjusting dynamic events. The currently received POI information is compared with the historical POI information. If the data increases, the POI is added; if the data decreases, the POI is deleted; if the data quantity remains unchanged but the value changes, the POI is modified.

5. A geographic information offline management system according to claim 3, characterized in that: The query module retrieves the corresponding map image and related data according to the input instructions and transmits them to the dynamic display module for display.

6. A geographic information offline management system according to claim 5, characterized in that: Bezier curves are used to smooth the routes in the map image.

7. A geographic information offline management system according to claim 2, characterized in that: When the start time of the dynamic display time range is reached, the map image is dynamically displayed according to the preset points; when the end time of the dynamic display time range is reached, the dynamic display ends.

8. A geographic information offline management system according to claim 7, characterized in that: The scaling constraint includes calculating the scaling ratio within a preset size range according to the difference between the virtual visual height when the user observes the point of interest and the preset standard height, and calculating the size of the icon rendering according to the scaling ratio.

Images