Centroid - ObjectVision/GeoDMS GitHub Wiki

Geometric functions centroid

• centroid(polygon_data_item)

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

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.

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

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

domain district, nr of rows = 3

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

• centroid_or_mid