Preparation method of universal map

A technology of maps and primitives, applied in the generation of 2D images, maps/plans/charts, educational tools, etc., can solve the problems of non-standardization and versatility, and the inability to realize the dissemination and sharing of symbolic information, so as to achieve easy understanding , to achieve the effect of dissemination and sharing without losing the ability of expression

Inactive Publication Date: 2010-06-23
WUHAN UNIV
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Problems solved by technology

[0004] The present invention mainly solves the need for special separate processing for some special map symbols in the prior art. Different systems adopt different methods, which do not have standardization and versatility. This approach not only ignores the map symbols Some of the special symbols that are difficult for computers to implement or are more complicated, let alone the technical issues such as the dissemination and sharing of symbol information; it provides a model that is concise, easy to understand and expressive, and can express the basic proportion of the country. All the map symbols on the graph diagram realize the propagation and sharing of map symbols and the preparation method of a common map

Method used

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Embodiment

[0058] First explain the definition of rigid primitives and flexible primitives:

[0059] Rigid primitives, also known as point primitives, do not deform during the configuration process, so only one positioning point is needed to locate them, including: ellipses (including circles), elliptical arcs (including circular arcs), sectors , Isosceles triangle (including equilateral triangle), rectangle (including square), rounded rectangle, rhombus, regular polygon, star, arrow. The selection of point primitives is obtained through the research and induction of the basic scale topographic map symbols, which basically includes the regular shapes that will appear in all symbols. Of course, this set is not closed, and the set can be expanded, as long as the graphics can be used Expressed by the structure of the point primitive class.

[0060] The point primitive class structure is as follows

[0061] Class MapSymbolPointGU

[0062] {

[0063] MapSymbolPen m_msPen;

[0064] MapSymb...

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Abstract

The invention belongs to the technical field of computer map making, in particular to the expression model and the drawing technology of map symbols in the map making. The invention mainly solves the technical problems that in the prior art, the special single processing is needed for some special map symbols, different systems adopt different methods, the normative effect and the universal effect can not be realized, the method ignores some special symbols difficult to be realized by the computer or complicated special symbols in the map symbols, and the transmission, the sharing and the like of the symbol information can not be realized. The invention provides a preparation method of a universal map, which has the advantages that the model is simple and clear and can be easily understood without the loss of expression capability, all map symbols on the diagrammatic presentation of the national basic scale topographic map can be expressed out, and the transmission and the sharing of the map symbols are realized.

Description

technical field [0001] The invention belongs to the technical field of computer map drawing, in particular to an expression model and drawing technology of map symbols in map drawing. Background technique [0002] Digital maps and their products have become the main way of spatial information visualization and a bridge between spatial data and users. Maps use symbols to record, transform, and transmit knowledge of various natural and social phenomena, while map symbols are directly responsible for the rendering and visual expression of spatial information, and are the link between spatial information and users. The map symbol is a special graphic symbol, which expresses the nature and mutual relationship of various objects and phenomena in a form that is convenient for spatial positioning, and forms a considerable and practical spatial image on the map. [0003] Generally speaking, there are two ways to design and implement map symbols: one is to use its secondary developme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00G09B29/10
Inventor 李霖贺彪朱海红张志军应申曹原于忠海邱俊武
Owner WUHAN UNIV
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