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Network map pre-loading method based on spatial calculation domain similarity match

A similarity matching and spatial calculation technology, applied in the field of network geographic information system, can solve the problems of reducing the user experience of network map and low map display efficiency, and achieve the effect of improving display efficiency and enhancing user inspection

Inactive Publication Date: 2016-06-15
地大(武汉)资产经营有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] The preloading of the web map is one of the important problems to be solved in the web geographic information system (WebGIS). Storing the historical access data of the web map to the local cache of the client can improve the efficiency of the next visit to the web map of the same geographic location, but When accessing new network map data that has not been visited before, since the target network map data does not exist in the client cache, the user needs to wait for a long time for the new network map data to be loaded in real time one by one, and the map display efficiency is low, which reduces the network map user operating experience

Method used

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  • Network map pre-loading method based on spatial calculation domain similarity match
  • Network map pre-loading method based on spatial calculation domain similarity match
  • Network map pre-loading method based on spatial calculation domain similarity match

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Embodiment 1

[0042] In order to illustrate the idea of ​​the present invention more clearly, below in conjunction with appendix figure 2 , to further explain the tile map preloading method based on the similarity matching of the spatial computing domain. The Openlayers development library is used as the map display framework, and the local storage technology in HTML5 is used to realize the storage of the tile map spatial computing domain. A single tile The height and width of the slice are both 256 pixels, and the origin (ox, oy) of the map is the upper left corner. Specific steps are as follows:

[0043] Step 201: Initialize the OpenLayers map container object map, create a tile layer class object instance layer, set the tile layer name name, call the addLayer function of the map object to add the tile layer to the map container, and call map.events The .register function adds the event listener of the map change event moveend of the map container, and sets the callback function eventsC...

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Abstract

The invention discloses a network map pre-loading method based on spatial calculation domain similarity match. The network map pre-loading method comprises the following steps of 1) establishing a spatial calculation domain database used for storing historical map accessing records; 2) initializing a map container object map; 3) calculating the geographic space scope of the current tile map spatial calculation domain when the visual range of the map is changed; 4) calculating the start-stop rank scope of tile data accessed by the current tile map spatial calculation domain; 5) searching a spatial calculation domain data record has the optimum similarity match; and 6) pre-loading a next spatial calculation domain data record when the spatial calculation domain data record has the optimum similarity match is found. The network map pre-loading method can carry out spatial calculation domain similarity match based on the historical accessing data of the spatial calculation domain, and predicts the spatial calculation domain which is most likely accessed next step, and preloads network map data which is likely accessed next step in advance, the display efficiency of network map data is improved, and the user experience of the network map service website can be improved.

Description

technical field [0001] The invention relates to network geographic information system technology, in particular to a method for preloading network maps based on similarity matching in spatial computing domains. Background technique [0002] The preloading of the web map is one of the important problems to be solved in the web geographic information system (WebGIS). Storing the historical access data of the web map to the local cache of the client can improve the efficiency of the next visit to the web map of the same geographic location, but When accessing new network map data that has not been visited before, since the target network map data does not exist in the client cache, the user needs to wait for a long time for the new network map data to be loaded in real time one by one, and the map display efficiency is low, which reduces the network map user operating experience. Contents of the invention [0003] The technical problem to be solved by the present invention i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
CPCG06F16/29G06F16/9537G06F16/9574
Inventor 郭明强黄鹰黄颖缪谨励谢忠吴亮罗显刚
Owner 地大(武汉)资产经营有限公司
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