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

• add (union)
• Union_polygon (dissolve)