Centroid

geometric-functions centroid

syntax

• centroid(polygon_data_item)

definition

centroid(polygon_data_item) results in a point data-item with the centroid of the polygon_data_item argument.

description

The centroid of a polygon does not have to be located within the polygon. Use the centroid_or_mid function to find a point always located within or at the border of that polygon such that point_in_polygon would return true;

applies to

• data-item polygon_data_item with fpoint or dpoint value-type and composition polygon

example

attribute<point_rd> centroid (district) := centroid(district/geometry);

domain district, nr of rows = 3

implementation details

see code from: https://github.com/ObjectVision/GeoDMS/blob/v13/rtc/dll/src/geo/Centroid.h

see also

• centroid_or_mid