Method for rapid positioning in map data

Abstract

The invention discloses a method for rapid positioning in map data. The method comprises following steps: obtaining multiple map cache files in a current map view field from a map data server background; at a browser end, executing the following process: generating each map cache file into a cache object in a key value mode; when a mouse hovers on a displayed map, obtaining the longitude and the latitude of the location at which the mouse is located, thus determining the cache object of the location at which the mouse is located; converting the longitude and the latitude of each data point in the cache object into a browser coordinate; generating a specific range of each data point in the browser; when the mouse is located in the specific range of a certain data point, brightly displaying the icon and the name of the data point; and adding the click event and the mouse shift out event of the data point. According to the method of the invention, the map data are only positioned at the browser end; the time for the network communication and the database query roundtrip of the foreground and the background is reduced; the user response waiting time is reduced; the user experience is improved; and the pressure of a back end server is reduced.

Description

technical field [0001] The invention relates to the field of geospatial information, in particular to a method for fast positioning in map data. Background technique [0002] At present, map data has been widely used in various applications of the Internet. Representative basic applications such as Google Maps (Google Earth), Baidu Maps, Gaode Maps, etc., and based on these basic applications, a large number of targeted applications have been developed, such as car and ship navigation applications, geographic information applications for leisure shopping, etc. . In recent years, with the vigorous development of the mobile Internet, map applications based on mobile positioning services have been widely developed, for example, by locating the current location on the map and then searching and pushing nearby services (such as pushing dining locations, shopping locations, etc.) , entertainment location, financial service location, etc.), which brings great convenience to mobil...

AI Technical Summary

Problems solved by technology

[0006] The WMS method can realize dynamic drawing according to the user's request, and then realize the map display of big data, which can bypass the limitation caused by drawing on the browser side. However, each resource point in the WMS method does not have a node dom( DocumentObjectModel (Document Object Model), the performance of click positioning is poor, and it needs to cooperate with map service query, which increases the pressure of map service, making the waiting time process of click positioning affect the experience

Images