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- shp_create- shp_add- shp_close
usage and function reference

ext_shapelib - usage

ext_shapelib - usage overview ::
ext_shapelib currently supports creation of new shape files, adding shapes and attributes to those files, and closing those files.
A list of currently available functions follows below.
shp_create() creates (or overwrites an existing) shapefile. shp_create also adds attribute fields to the dbf file - attribute definitions cannot be changed afterwards.
shp_add() adds a new shape to a shape file. Attribute values of the given shape are stored in the dbf file. Currently, only "simple" shape types are supported.
shp_close() closes a shape file, and flushes all written data to disk.