Upper_bound
geometric-functions upper_bound
syntax
- upper_bound(polygon_data_item)
definition
upper_bound(polygon_data_item) results in a point data-item with the highest X and Y value of the points in the polygon_data_item.
In the Dutch RD coordinate system, the upper_bound is the top right coordinate.
applies to
data item polygon_data_item with fpoint or dpoint value-type and composition type polygon
example
attribute<point_rd> ub (district) := upper_bound(district/geometry);
| district/geometry | ub |
|---|---|
| {21 {403025, 113810}{4 | {403552, 113810} |
| {17 {400990, 113269}{4 | {401597, 113291} |
| {19 {401238, 115099}{4 | {401642, 115164} |
domain district, nr of rows = 3