bg_union

geometric-functions bg_union (union)

syntax

  • bg_union (polygon_data_itemA, polygon_data_itemB)

description

bg_union (polygon_data_itemA, polygon_data_itemB) results in a new multi polygon data-item with the union of the two polygon_data_itemA and polygon_data_itemB data items. Similar to adding to numbers. In other words, row for row. Whereas, union_polygon-(dissolve) aggregates similar to sum over multiple rows.

conditions

  1. The composition type of the arguments needs to be polygon.
  2. The domain-unit of the arguments must match or be void.

since version

15.4.0

example 

parameter<fpoint> NorthHolland (poly) := bg_union(Land/geometry, Texel/geometry);

see also