Method for sea-land vector map data integration and fusion

Abstract

The invention discloses a method for sea-land vector map data integration and fusion, which includes the steps of data pre-treatment, data format conversion, data integration display, same-name entity matching, same-name entity combination and the like. A digital audio tape (DAT) data format put forward by the method enables map control information, index data and position coordinate data to be packaged on one file and stored with layers as the unit. The storage format is convenient for management of layers, and when data of a corresponding layer is read, the data file only needs to be opened once, so that data reading speed of data is greatly improved, and simultaneously the size of the map data file is reduced to a certain degree. In addition, the same-name surface entity matching method based on simplification of polygon is capable of replacing all point entities forming a surface entity with four points or eight points obtained through simplification to participate in a matching process, thereby being capable of reducing complexity, improving matching rate, and simultaneously being capable of storing simplified results to be in the mode of files to be convenient for secondary use.

Description

technical field [0001] The invention relates to an integration and fusion method of sea and land vector map data, belonging to the technical field of geographic information system spatial data processing. Background technique [0002] The data fusion of sea and land vector maps can integrate the information of vector sea charts and vector land maps, so it can eliminate the single information and space limitations brought by a single vector sea map or a single vector land map data, and obtain rich information and high quality. Higher information can better meet people's application needs. With the application of geographic information system more and more widely, people's demand for geospatial vector data is more and more urgent, and sea and land vector data often have differences in spatial reference, semantic coding, storage format, etc., which makes sea and land vector data The integration and fusion of map data has been widely used. [0003] Data integration is the logi...

AI Technical Summary

Problems solved by technology

This method mainly focuses on the building surface entity in the city map, but it cannot match well other complex shape surface entities (such as lakes, islands, etc.)

For the existing surface entity matching methods, most of them have the characteristics of heavy workload, slow processing speed, and complex data processing process, which makes it time-consuming and laborious to process vector data in large quantities.

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