An Efficient Interactive Method for Electronic Map Annotation

Abstract

The invention discloses a high-efficiency electronic-map lettering interaction method which includes the following steps: extracting position information of lettering in electronic maps of different measuring scales; extracting geographical element attribute information and position information related with the lettering and storing the information as a formatted text; adopting an indexed mode identical with that of a tilemap and performing classification and partition slicing on the formatted text and storing generated tile files in a text method, wherein the content of the files is lettering and related attribute information in a geographical range which is covered by corresponding map picture slices; adopting a tilemap service interface to provide a map lettering text tile access service of a server side; accessing map lettering text tiles through the service interface or accessing an offline tile file directly and analyzing lettering range information and related element information in the tiles by a client; and realizing visualization and interaction functions of lettering information by the client. The high-efficiency electronic-map lettering interaction method is capable of rapidly responding to operations of users on text lettering and signs in an electronic map and providing corresponding information service and interaction interface.

Description

technical field [0001] The invention relates to the field of electronic map application, in particular to an efficient electronic map annotation interaction method, which can be applied to online or offline electronic map application software running on desktop computers, Web, mobile phones, tablet computers and other devices. Background technique [0002] At present, the use of raster data organization to construct electronic maps is quite popular, especially the tile map data organization form based on the idea of ​​pre-generation is widely used in various network electronic maps. In exchange for the greatest gain in the user's visual space. Tiles are generally obtained through "pre-generation" technology, which refers to cutting a certain range of map data into bitmaps of several rows and columns according to a specific size (such as 256 pixels as the side length) and a specific format (such as JPEG). And store them according to a certain index method, tiles are also cal...

AI Technical Summary

Problems solved by technology

[0003] However, the above-mentioned traditional technical system has the following deficiencies: 1. The annotations in the map tiles and the geographic elements in the vector map document are fused into an image file, which does not contain geographic element information and the location information of the annotation itself, and cannot support tile hotspots Function

2. The annotation in the vector map document only contains the surface expression information such as annotation font, annotation text size, annotation display text, etc., but does not contain the associated geographic element information or the association with the geographic element is unstable