bp_polygon

Geometric functions > bp_polygon

syntax

  • bp_polygon(polygon_data_item)

description

bp_polygon(polygon_data_item) results in a data item with the same domain as the polygon_data_item, with the geometry cleaned and validated using the Boost Polygon library. It can be used to repair or normalize polygon geometries.

The bp_ prefix of the function name indicates that the implementation of the operator uses the Boost Polygon library, which requires integer coordinates (ipoint or spoint).

applies to

conditions

  1. The composition type of the polygon_data_item needs to be polygon.
  2. The data item must have a point value type with integer coordinates (ipoint or spoint).

since version

15.6.0

example 

attribute<ipoint> geometry_clean (district) := bp_polygon(district/geometry);

see also