Lake automatic selection method and device based on dynamic multi-scale clustering

Abstract

The invention relates to the map integration field, and specifically relates to a lake automatic selection method and device based on dynamic multi-scale clustering; the method comprises the followingsteps: setting an area threshold according to a target scale, and selecting all lakes with the area greater than the threshold; creating buffer areas for all lakes, and selecting lakes with no bufferarea intersection relation as key holding points of distribution features; using dynamic multi-scale clustering to divide the lake group into areas according to distribution density; finally, employing different selection strategies on different areas (i.e., small lake group). The method can effectively keep the form structure and density contrast of the lake group under different target scales before and after the selection, and the selection result has good rationality; the method can be applied to lake element automatic selection integrated processing of the topographic map under differenttarget scales.

Description

technical field [0001] The invention relates to the field of map synthesis, in particular to a method and device for automatically selecting lakes based on dynamic multi-scale clustering. Background technique [0002] There are tens of thousands of lakes distributed on the mainland, with large differences in area and capacity. On the whole, the distribution of lakes is uneven. Some of them are distributed in the form of clusters of lakes and connected to each other by rivers, and some are distributed in a scattered form. For cartographers, the selection of lake groups in the process of map reduction is difficult, requires a lot of knowledge and experience, and takes a long time. At present, there are relatively few studies on the automatic selection of lake elements, and most of them adopt the form of overall selection, which is difficult to take into account the attribute characteristics, distribution characteristics and topological characteristics of lakes. Therefore, it...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method and device for automatic selection of lakes based on dynamic multi-scale clustering, to solve the problem that the existing lake selection methods are difficult to take into account the attribute characteristics, distribution characteristics and topological characteristics of lakes, resulting in the automatic selection of lakes in map synthesis. exact question

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