Device and method for converting optional area electronic marine map file format

Abstract

The invention provides a device and a method for converting an optional area electronic marine map file format. The device comprises an electronic marine map scaling display module, an electronic marine map optional area selecting module, an electronic marine map layer selecting module and an electronic marine map element information reading and writing module, wherein the electronic marine map scaling display module is used for amplifying and reducing an electronic marine map, obtaining an electronic marine map converting relation structure and providing an electronic marine map converting parameter; the electronic marine map optional area selecting module is used for obtaining the longitude and latitude information of an electronic marine map area to be converted; the electronic marine map layer selecting module is used for recognizing selected area electronic marine map layer element information and displaying the map layer element information of an appointed electronic marine map area; and the electronic marine map element information reading and writing module is used for reading an electronic marine map file in a custom format by the electronic marine map converting parameter provided by the electronic marine map scaling module, extracting map layer element information meeting the requirement and writing the extracted map layer element information into the file accordingto a standard marine map file format. The invention realizes the aim that the electronic marine map display can be automatically changed along with the update of a marine map display scale and meets the requirement of unifying the marine map file format in the electronic marine map.

Description

technical field [0001] The invention belongs to the technical field of geographic information systems. It relates to an electronic chart file format conversion device and method. Background technique [0002] With the rapid development of computer technology and graphics and image processing technology, more and more electronic chart file formats expressed in digital form have appeared, which have the characteristics of rich functions and high flexibility. Therefore, it has been rapidly developed and widely used in modern nautical chart drawing. With the continuous emergence of geographic information system (GIS) software development platforms and tools, different units may use different development platforms, and even the same unit may use multiple development platforms, so there are differences in the conversion of data in different graphic formats. question. [0003] At present, electronic chart data has multiple storage formats. Due to the different storage formats of...

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Problems solved by technology

[0005] At present, relevant domestic companies and scientific research institutions are studying the conversion from integrated spatial data files to shapefile file formats, all of which convert the entire integrated spatial data files into shapefile files, and the lossless conversion of data cannot be guaranteed

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