A parallel conversion method of vector data from vct file to shapefile
A conversion method and technology of vector data, applied in the field of parallel conversion of vector data, can solve problems such as the inability to realize rapid conversion of large-scale geographic data, and no solution for large-scale VCT data application, and achieve fast and effective index construction and good versatility , the effect of improving the efficiency of use
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[0045] This embodiment adopts the standard C++ programming language to develop under MicrosoftVisualStudio2010 development platform, and realizes under MPI (MessagePassingInterface) parallel environment, and the read and write operation of shapefile is realized through open source geographical data format conversion class library GDAL.
[0046] The input data in this embodiment is a VCT file output from a certain land use database, and the data volume is 450MB. Part of the information of the VCT file is as follows Figure 3a As shown, the map projection is Gauss-Krüger projection, and the reference ellipsoid is IAG-75 ellipsoid. The file contains three types of geometric projection data: point, line, and surface, including 11 layers of administrative regions, administrative region boundaries, land-type maps, land-type boundaries, and sporadic features.
[0047] The test environment used in this embodiment is: IBMSystemx3500-M3X server, configured as 2 IntelXeonQuadCoreE5620 q...
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