Method for drawing synchronously displayed symbols and marks of dot map layers of map

Abstract

The invention provides a drawing method of dot map layers of a map, which comprises the step of simultaneously drawing a symbol and a mark for each dot element of the dot map layers requiring synchronous display. In addition, the invention also provides a map drawing method which comprises the following steps of: (1) for each layer in all map layers, if the map layer is not a dot map layer or does not require synchronous display, drawing the symbol of the map layer; (2) for each layer in all the map layers, if the map layer is not a dot map layer or does not require synchronous display, drawing the mark of the map layer; and if the map layer is a dot map layer and requires synchronous display, simultaneously drawing the symbol and the mark for each element. The realization method provided by the invention has simple realization logic, the operation and the control are also easy for a user, and the efficiency is high.

Description

technical field [0001] The invention relates to the fields of electronic maps and digital mapping, in particular to a map drawing method. Background technique [0002] In the field of electronic maps, the output of feature annotation is an important content. The electronic map has a text mark, and the user can clearly identify the ground objects and identify the orientation. [0003] There are many targets of point-shaped geographical elements with regional landscape characteristics on the map, such as scattered residential areas distributed in points, densely distributed small island groups and small lake groups, etc., are all represented by points. Vector displays of point geographic features can define symbols, and text displays can define annotation. Such as figure 1 , where the circle is the symbol for the point feature and the text to the right of the circle is the annotation for the point feature. [0004] In cartographic generalization based on Chinese display, t...

AI Technical Summary

Problems solved by technology

[0018] The technical problem to be solved by the present invention is that the operation is complicated, the control is difficult and the efficiency is low in the drawing method of the existing point layer.

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