Lower_bound
geometric-functions lower_bound
syntax
- lower_bound(polygon_data_item)
definition
lower_bound(polygon_data_item) results in a point data-item with the lowest X and Y value of the points in the polygon_data_item.
In the Dutch RD coordinate system, the lower_bound is the bottom left coordinate.
applies to
data item polygon_data_item with fpoint or dpoint value-type and composition type polygon
example
attribute<point_rd> lb (district) := lower_bound(district/geometry);
| district/geometry | lb |
|---|---|
| {21 {403025, 113810}{4 | {402428, 112312} |
| {17 {400990, 113269}{4 | {400817, 112176} |
| {19 {401238, 115099}{4 | {400888, 112888} |
domain district, nr of rows = 3