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A geographic information system map rendering method and device
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A geographic information system and map technology, applied in the field of image rendering, can solve problems such as incomplete rendering tiles, affecting GIS map rendering, and inability to accurately position and render, so as to improve response speed and user experience
Active Publication Date: 2020-05-01
XINYANG BRANCH HENAN CO LTD OF CHINA MOBILE COMM CORP
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[0004] The embodiment of the present invention provides a geographic information system map rendering method and device, which are used to solve the problem in the prior art that the target data is located at the boundary of tiles and cannot be accurately positioned and rendered, resulting in incomplete rendered tiles, and further Problems that affect the rendering of the entire GIS map
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Embodiment 1
[0043] Embodiment 1 of the present invention provides a geographic information system map rendering method, the flow of the method is as follows figure 2 shown, including:
[0044] S101 acquires the coordinate information of the target point on the map;
[0045] S102, according to the coordinate information of the target point on the map, determine whether the target point is located at the boundary of at least two tiles on the map, and if so, perform step S103;
[0046] S103 Determine a reference tile so that the target point is located inside the reference tile;
[0047] S104 re-slicing the map according to the reference tile;
[0048] S105 Render the map according to the slice obtained by re-slicing with the reference tile as the center.
[0049] Preferably, step S103 further includes selecting a tile from at least two tiles at the boundary; changing the rendering range of the selected tile to obtain a reference tile so that the target point falls within the Reference ...
Embodiment 2
[0065] Embodiment 2 of the present invention provides a geographic information system map rendering method, the flow of the method is as follows Figure 4 shown
[0066] S201 Acquire the coordinate information of the target point on the map.
[0067] S202 According to the coordinate information of the target point on the map, determine whether the target point is located at the boundary of at least two tiles on the map, if yes, perform step S204; if not, perform step S203 .
[0068] S203 Use the tile where the target point is located as the starting tile, and spirally render the surrounding tiles until rendering the entire map;
[0069] S204 Randomly select a tile from at least two tiles at the boundary.
[0070] If the target point is on the common edge of two tiles, randomly select a tile from the two tiles; if the target point is a common vertex of four tiles, randomly select a tile from the four tiles .
[0071] S205 Change the rendering range of the selected tile to ...
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Abstract
The invention relates to the technical field of image rendering, and discloses a geographic information system map rendering method which comprises the following steps: acquiring coordinate information of a target point on a map; according to the coordinate information of the target point on the map, confirming whether the target point is positioned at the boundary of at least two tiles on the map; if the target point is positioned at the boundary of at least two tiles on the map, confirming a reference tile, and positioning the target point inside the reference tile; re-cutting the map according to the reference tile; rendering the map according to pieces obtained through re-cutting by taking the reference tile as the center. By adopting the geographic information system map rendering method, the problems that the phenomenon that tiles are not completely rendered can be caused and furthermore whole GIS (Geographic Information System) map rendering can be affected since accurate positioning and rendering cannot be implemented as target data are positioned at the boundary of the tiles can be solved.
Description
technical field [0001] The invention relates to the technical field of image rendering, in particular to a geographic information system map rendering method and device. Background technique [0002] Geographic Information System (GIS), with the support of computer hardware and software systems, collects, stores, manages, calculates, analyzes and displays relevant geographical distribution data in the space of the entire or part of the earth's surface (including the atmosphere) and describe the technical system. GIS maps are stored using the tile technology (MapTile). The map tile technology cuts the configured map with a certain coordinate range into several rows and columns of square images according to a fixed scale and specified image size, and saves them as image files in a specified format. , the map slice obtained by cutting the map is also called a tile (Tile). [0003] After the initial rendering of the GIS map is completed, the user needs to view or analyze a cer...
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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/29G09B29/00
Inventor 李红杰裴照华张保华盛强苗浩龙范晨声王亚军曹文慧
Owner XINYANG BRANCH HENAN CO LTD OF CHINA MOBILE COMM CORP
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