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Extraction method and display method of electronic map interest points based on road network

An electronic map and extraction method technology, applied in the extraction method and display field of electronic map interest points

Active Publication Date: 2018-11-13
CHINESE ACAD OF SURVEYING & MAPPING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For POI data on a large scale, the distribution and density of urban POI data have an important relationship with the environment around the road, so it is not appropriate to simply regard POI data as overall point group data

Method used

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  • Extraction method and display method of electronic map interest points based on road network
  • Extraction method and display method of electronic map interest points based on road network
  • Extraction method and display method of electronic map interest points based on road network

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Embodiment Construction

[0057] A method for extracting interest points from an electronic map based on a road network provided by the present invention will be described in detail below with reference to the accompanying drawings. Under the conception of the present invention, two aspects need to be taken into account when extracting point data in large-scale cities: POI (point of interest), as a member of a point group, must consider the overall distribution characteristics before and after synthesis, distribution density, etc.; In addition to considering POI as a member of a point group, as an independent point element, its location characteristics, constraint information with surrounding features, etc. should also be considered.

[0058] Such as figure 1 As shown, the electronic map point of interest extraction method based on the road network provided by the invention comprises the following steps:

[0059] Step 100: Prepare POI data.

[0060] In this step, collect all POI data and represent al...

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Abstract

The present invention provides a road network based electronic map POI (point of interest) extraction method. The method comprises the following steps: A. collecting all POI data, and demonstrating the POI data in a point set form; B. gathering road data of a region which the POI data is in; C. using the road data to establish a topological structure of a road network; D. classifying the POI data according to the road network; and E. extracting the POI data according to the classification of the POI data. According to the extraction method provided by the present invention, more accurate extraction of an electronic map POI can be realized on the basis of no loss of efficiency. The present invention further provides a road network based electronic map POI display method.

Description

technical field [0001] The invention relates to an extraction method and a display method of an electronic map interest point, in particular to an extraction method and a display method of an electronic map interest point based on a road network. Background technique [0002] Point of Interest (POI) is an essential element in electronic maps, and the multi-scale characteristics of electronic maps determine that the number and types of POIs displayed at different scales are different. How to effectively extract massive POIs is an important technical means to optimize the display (expression) of electronic maps at different scales. [0003] The extraction of POI is subordinate to the simplification of point group data to a certain extent. Ai Tinghua et al. defined four description parameters for the distribution of point group targets, using the Voronoi diagram (also known as Thiessen polygon or Dirichlet diagram, which is a continuous polygon composed of a group of perpendic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/30
CPCG06F16/29G06F16/9537
Inventor 李成名郭沛沛殷勇印洁方驰宇洪志远赵园春吴伟张成成朱丽宁
Owner CHINESE ACAD OF SURVEYING & MAPPING