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Method for measuring compactness of disconnected polygon

A measurement method and polygonal technology, applied in vector format still image data, still image data retrieval, image data processing, etc., can solve the problems of inability to calculate the compactness of disconnected polygons, and inability to compare the difference in the compactness of disconnected polygons, etc. To achieve the effect of compact structure, good display quality and low redundancy

Pending Publication Date: 2020-06-05
SOUTH CHINA AGRI UNIV
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Problems solved by technology

In reality, boundaries such as roads, rivers, and administrative boundaries generally exist in the geographical environment, and these boundaries will divide the originally connected land parcels, thus forming disconnected polygons; existing methods are mainly used to measure single polygons Or connected polygons, the disadvantage is that the compactness of disconnected polygons cannot be calculated, and the compactness of different spatial distributions of disconnected polygons cannot be compared

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  • Method for measuring compactness of disconnected polygon
  • Method for measuring compactness of disconnected polygon
  • Method for measuring compactness of disconnected polygon

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Embodiment

[0045] see figure 1 , figure 1 is a schematic flowchart of a method for measuring the compactness of disconnected polygons in an embodiment of the present invention.

[0046] like figure 1 As shown, a method for measuring the compactness of disconnected polygons, the method includes:

[0047] S11: Obtain a set of disconnected polygons in a preset area;

[0048] In the specific implementation process of the present invention, it is first necessary to determine the area where compactness needs to be measured, and then obtain all polygons in this area to form a corresponding polygon set.

[0049] S12: Aggregate all polygons in the polygon set to obtain an aggregated single polygon;

[0050] In a specific implementation process of the present invention, the performing aggregation processing on all the polygons in the polygon set includes: performing aggregation processing on all the polygons in the polygon set based on the spatial relationship between all polygons.

[0051] Fur...

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Abstract

The invention discloses a method for measuring the compactness of disconnected polygons, and the method comprises the steps: obtaining a disconnected polygon set in a given region; aggregating all polygons in the set to obtain an aggregated single polygon; performing weighted aggregation degree and proximity index calculation on the polygon set and the aggregated single polygon to obtain weightedaggregation degree and proximity index values; and obtaining the compactness of the disconnected polygon based on the weighted aggregation degree and the proximity index value. In the embodiment of the invention, the compactness value of the polygons which are not connected with each other in the given area can be accurately calculated, and the measurement value range is between 0 and 1, so that the comparison is convenient; the measurement method is suitable for high-precision and low-redundancy vector data.

Description

technical field [0001] The invention relates to the technical field of computer graphics processing, in particular to a method and system for measuring the compactness of disconnected polygons. Background technique [0002] The spatial distribution of polygons is a complex system composed of various permutations and combinations of polygons with different properties; the interaction between polygons promotes the dynamic development of the distribution and enables different layouts to take shape. The spatial distribution of polygons has important and extensive applications in geography, and can be used in the selection of geographic elements, evaluation of geographic elements, and zoning, including land acquisition, landscape ecology, site selection and design of nature reserves, and urban planning and spatial aggregation, etc. For example, land plots (a plot represented by a polygon in the computer) are a typical geographic element. Due to the effect of nature and the impa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F16/56G06T7/62
CPCG06F16/56G06T7/62
Inventor 周晋皓黄晓峻肖宁川刘轶伦梁燊向银昌
Owner SOUTH CHINA AGRI UNIV
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