opengeospatial/ogc-geosparql

`(min|max)(X|Y|Z)` definition should mention which SRS

Closed this issue · 2 comments

VladimirAlexiev commented

The functions (min|max)(X|Y|Z)
https://opengeospatial.github.io/ogc-geosparql/geosparql13/document.html#_function_geofmaxx
are defined as "returns the maximum X coordinate for geom" and declared to return xsd:double

  • I think the definitions should add "using the SRS of geom".
  • I thought that GeometryCollection can have several SRS, but then found this in sf_geometries.ttl: "All the elements in a GeometryCollection shall be in the same Spatial Reference System. This is also the Spatial Reference System for the GeometryCollection."
    So the definitions could also add "(every geometry, even GeometryCollection, has a single SRS)"
situx commented

Thanks for the suggestion. I agree. I would improve the definitions.

situx commented

We have merged your suggestion, so I am closing this issue