Computer automatic drafting method of complicated map symbol

A map symbol and automatic drawing technology, applied in the field of geographic information, can solve the problems of reducing the visual expression function of geographic information, incompleteness, and inability to describe, and achieve excellent flexibility and versatility, enhanced functions, and easy implementation

Inactive Publication Date: 2008-04-09
WUHAN UNIV
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Problems solved by technology

However, the existing map symbol configuration parameters can only describe regular point, line, and surface symbols, and complex symbols (such as map symbols such as rocky cliffs and rocky cliffs) cannot be processed using the existing symbol configuration parameters. unified des

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  • Computer automatic drafting method of complicated map symbol
  • Computer automatic drafting method of complicated map symbol

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Embodiment Construction

[0021] Aiming at the characteristics of the composition of complex map symbols in the map drawing system, the present invention establishes a set of basic graphic element types and configuration parameters that can describe the characteristics, and the map symbol graphic element parameter model composed of basic graphic element types and configuration parameters is realized. The basis for automatic computer rendering of complex map symbols. Since the basic graphic element type setting in the graphic element parameter model is to analyze and summarize the composition of complex map symbols, during specific implementation, technicians can set according to specific needs. The present invention provides a set that is proved to be relatively complete in experiments Basic primitive types, including ellipses, arcs, sectors, triangles, rectangles, polylines, curves, and polygons. With configuration parameters, this set of basic primitive types can basically meet the needs of drawing c...

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Abstract

The invention relates to a computer automatically-drawing method for complex map symbols. The method includes the following steps: setting map symbols model module in a computer system, and establishing an image unit parameter model based on the map symbols model module, wherein the image unit parameter model is composed of basic image unit types and set parameters thereof; providing a symbol data file for drawing and outputting, wherein the symbol data of the complex map symbols is obtained by the following steps: resolving complex map symbols into basic image units based on the image unit parameter model, setting the set parameters based on the image unit parameter model obtained by resolution, and storing the basic image unit types and the set parameter results in the symbol data file; and setting an automatic drawing module for the map symbols in the computer system, wherein the module reads correspondent basic image units and the set parameters in the symbol data file based on the drawing target to realize drawing and outputting. The invention promotes describing system of the map symbols and can realize computer automatic drawing of all map symbols, which has important application in geographic information field.

Description

technical field [0001] The invention belongs to the technical field of geographical information, in particular to a computer automatic drawing method of complicated map symbols. Background technique [0002] The map expression of spatial information is an important output function in existing geographic information systems and cartography systems, and the use of special graphic symbols to represent geographical elements and phenomena is one of the basic characteristics of maps. Therefore, the automatic drawing of various map symbols in geographic information systems and cartography systems is the key to the visual expression of geographic information. The existing automatic drawing methods of map symbols can be divided into two types: function method and configuration parameter method. The function method designs a special drawing function for each map symbol. Using this method, the characteristics of each symbol can be fully considered, and the drawn symbols are relatively...

Claims

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Application Information

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IPC IPC(8): G06T11/20G06F17/30
Inventor 朱海红梅洋王红李霖应申
Owner WUHAN UNIV
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