A Standard Transformation Method of Vector Graphics Based on Spatial Data Model

Abstract

The invention discloses a vector map standard conversion method based on a spatial data model. The vector map standard conversion method based on the spatial data model comprises the following steps: the first step is constructing a standard symbol library and a symbol mapping association table; the second step is analyzing symbols applied to a map to be converted and generating a picture with certain size; the third step is seeking all standard symbols which are the same as the map to be converted in standard type and symbol category in the standard symbol library and rendering the standard symbols sought by using rendering information of the map to be converted and generating a picture which is the same as the picture in the second step in size; the fourth step is carrying out pixel matching one by one on the picture generated in the second step and the picture generated in the third step and obtaining symbol names of the symbols of the map to be converted in the standard symbol library; and the fifth step is seeking a symbol name of a target standard and converting the target standard to a symbol corresponding to the target standard. Compared with the prior art, the vector map standard conversion method based on the spatial data model has the advantages that the problem of manual conversion of each standard symbol with a traditional method, and efficiency and quality of symbol conversion are improved.

Description

technical field [0001] The present invention relates to the field of GIS (Geographic Information System, Geographic Information System) and the field of standard conversion of maps, in particular to automatically converting all maps in batches according to user requirements in the field of at least two different map drawing standards. The symbol of an existing standard to the symbol of another standard. Maps include vector, raster, paper and other forms of maps. The map here mainly refers to the vector map generated by professional GIS software, that is, a kind of engineering file, which can be published as our common electronic map. Background technique [0002] At present, the standard conversion of vector graphics can only convert all the standard symbols in the graphics one by one manually. This manual method is not only time-consuming and laborious, but also requires technicians to understand the meaning of each standard symbol in the graphics in advance. Otherwise, i...

AI Technical Summary

Problems solved by technology

[0002] At present, the standard conversion of vector graphics can only convert all the standard symbols in the graphics one by one manually. This manual method is not only time-consuming and laborious, but also requires technicians to understand the meaning of each standard symbol in the graphics in advance. Otherwise, it will cause errors in symbol expression and cannot truly reflect the information conveyed by the original map

Therefore, this method is not conducive to the improvement of the utilization efficiency of spatial data, and makes the sharing of map information difficult

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