Center_bound
geometric-functions center_bound
syntax
- center_bound(polygon_data_item)
definition
center_bound(polygon_data_item) results in a point data-item with the center of the bounding box of the polygon_data_item.
applies to
data item polygon_data_item with fpoint or dpoint value-type and composition type polygon
example
attribute<point_rd> cb (district) := center_bound(district/geometry);
| district/geometry | cb |
|---|---|
| {21 {403025, 113810}{4 | {402990, 113061} |
| {17 {400990, 113269}{4 | {401207, 112734} |
| {19 {401238, 115099}{4 | {401265, 114026} |
domain district, nr of rows = 3