wradlib.io.misc.write_polygon_to_text#

wradlib.io.misc.write_polygon_to_text(fname, polygons)[source]#

Writes Polygons to a Text file which can be interpreted by ESRI ArcGIS’s “Create Features from Text File (Samples)” tool.

This is (yet) only a convenience function with limited functionality. E.g. interior rings are not yet supported.

Parameters

  • fname (str) – name of the file to save the vertex data to

  • polygons (list) – list of lists of polygon vertices. Each vertex itself is a list of 3 coordinate values and an additional value. The third coordinate and the fourth value may be nan.

Returns

None

Note

As Polygons are closed shapes, the first and the last vertex of each polygon must be the same!

Examples

Writes two triangle Polygons to a text file::

poly1 = [[0.,0.,0.,0.],[0.,1.,0.,1.],[1.,1.,0.,2.],[0.,0.,0.,0.]] poly2 = [[0.,0.,0.,0.],[0.,1.,0.,1.],[1.,1.,0.,2.],[0.,0.,0.,0.]] polygons = [poly1, poly2] write_polygon_to_text(‘polygons.txt’, polygons)

The resulting text file will look like this::

Polygon 0 0 0 0.000000 0.000000 0.000000 0.000000 1 0.000000 1.000000 0.000000 1.000000 2 1.000000 1.000000 0.000000 2.000000 3 0.000000 0.000000 0.000000 0.000000 1 0 0 0.000000 0.000000 0.000000 0.000000 1 0.000000 1.000000 0.000000 1.000000 2 1.000000 1.000000 0.000000 2.000000 3 0.000000 0.000000 0.000000 0.000000 END