Configuration method of area feature annotation based on double visual center and device thereof

A configuration method and dual-vision technology, applied to maps/plans/charts, instruments, educational tools, etc., to improve configuration efficiency and control configuration quality

Inactive Publication Date: 2010-02-10
NAVINFO
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Problems solved by technology

[0008] In order to solve the above problems, the object of the present invention is to provide a configuration method and device for annotating planar elements based on dual-vision centers, which can ...

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  • Configuration method of area feature annotation based on double visual center and device thereof
  • Configuration method of area feature annotation based on double visual center and device thereof
  • Configuration method of area feature annotation based on double visual center and device thereof

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Embodiment Construction

[0044] In this embodiment, by gridding the area elements, the point sets on the boundary of the area elements and the point sets in the area elements are obtained, and all the points in the point sets in the area elements are used as undetermined points , calculate the sum of the geometric information entropy values ​​of two optional points to be determined, and set the coordinates of the selected two points corresponding to the calculated maximum geometric information entropy value as the area feature annotation based on the dual vision center configuration coordinates.

[0045] Based on the configuration of dual visual centers, that is, when the surface elements are annotated as characters such as two Chinese characters, two letters, and two numbers, use the configuration of dual visual centers to find an annotation configuration point for each character.

[0046] For example: set any point pair (p1, p2) (p1≠p2) in the area element A as the pending point of the double-word a...

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Abstract

The invention provides a configuration method of an area feature annotation based on a double visual center and a device thereof, belonging to the digital mapping technical field. The configuration method comprises the following steps: carrying out grid treatment on planar features by a predetermined grid spacing to obtain a set of points in the area feature; calculating a polygon area value S corresponding to the area feature; optionally selecting two points from the set of the points in the area feature, and respectively calculating an area value of a Voronoi graph corresponding to the two selected points; and calculating the sum of a geometric information entropy of a first point and a geometric information entropy of a second point in the selected two points, and setting coordinates ofthe two selected points corresponding to the sum of the maximum geometric information entropies obtained by calculation into a coordinate of the area feature annotation configured based on the doublevisual center. The method can help realize automatically complete configuration of the area feature annotation without manual intervention.

Description

technical field [0001] The invention belongs to the technical field of digital mapping, and in particular relates to a configuration method and device for annotating planar elements based on dual visual centers in an electronic map. Background technique [0002] In the map language, in addition to the basic graphic language of map symbols, natural language - map annotation is also a very important part. Cartographic annotation is a general term for characters and numbers on a map, and is an integral part of the map language. Map notes are composed of factors such as font, font size, word spacing, position, arrangement direction and color. Map annotation is a very important tool for information transmission, and only with annotations on maps can they be readable and translatable. [0003] Map objects can be divided into point elements, linear elements and area elements according to their distribution characteristics, and corresponding map annotations can be divided into thr...

Claims

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Application Information

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IPC IPC(8): G09B29/10
Inventor 吴中恒张韵曹晓航
Owner NAVINFO
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