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Face-face superposition ring construction method

A construction method and outer ring technology, applied in the field of superposition analysis, can solve the problems of incomplete superposition ring construction process and low superposition ring construction efficiency, and achieve the effects of avoiding frequent visits, improving construction efficiency, and completing construction process.

Inactive Publication Date: 2009-08-05
北京中科通图信息技术有限公司
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Problems solved by technology

[0013] The purpose of the present invention is to overcome the defects of the prior art that the construction efficiency of superimposed rings is not high, and the construction process of superimposed rings is incomplete, so as to provide an efficient and complete surface-to-surface superimposed ring construction method

Method used

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Embodiment Construction

[0073] The surface-to-surface superposition ring construction method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0074] Before the method of the present invention is described in detail, the concepts of inner ring and outer ring involved in the present invention are firstly explained accordingly:

[0075] Rings, Inner Rings, and Outer Rings: Rings are made up of a series of points around them. Both the inner ring and the outer ring are definitions related to the polygon, and the inner ring and the outer ring are both components of a polygon. Generally speaking, a polygon is an area enclosed by a string of points. But in GIS, depending on the attribute, some areas inside the polygon are not part of the polygon. For example, Beijing City and Tianjin City are within the boundary outline of Hebei Province, but Beijing City and Tianjin City are not in the area of ​​Hebei Province. For this p...

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Abstract

The invention provides a method for constructing side to side overlapping ring which includes steps as follows: processing joint operation to a polygon in two polygon groups and processing dispatch operation to a polygon in two polygon groups; wherein, the joint operation includes: searching a polygon ring to the polygon ring generated a crossing point through the crossing point in-out attribute; confirming whether inserting the polygon ring having no crossing point into the result ring aggregate according with relationship of a representation point and another polygon group; the dispatch operation includes: classifying the polygon; processing insert operation to the polygon existing a same color crossing point only and existing no any crossing point for obtaining an inner ring aggregate, an outer ring aggregate of the dispatch result and an inner ring aggregate waited split; requesting dispatch operation according with the crossing point and the waited dispatched inner ring aggregate and inserting the result in the outside ring aggregate of the dispatch result. The method had advantages of high efficiency and full construction process.

Description

technical field [0001] The invention relates to the field of overlay analysis in GIS (Geographical Information System, geographic information system), in particular to a surface overlay ring construction method. Background technique [0002] Geographic Information System (GIS) is a very important spatial information system. It is a technical system that collects, stores, manages, calculates, analyzes, displays and describes the relevant geographical distribution data in the entire or part of the earth's surface (including the atmosphere) space with the support of computer software and hardware systems. Spatial analysis is an important part of GIS, the soul of GIS, and one of the main indicators for evaluating a GIS function. Spatial analysis is a spatial data analysis technology based on the location and morphological characteristics of geographical objects. Its purpose is to extract and discover hidden spatial information and laws. It is one of the basic methods of spatial...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 闫杰朱效民郎兵方金云
Owner 北京中科通图信息技术有限公司
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