Re: [gdal-dev] 3D extent

2023-06-23 Thread Even Rouault
(re-adding the list) Le 23/06/2023 à 11:34, B. De Mezzo a écrit : Thanks! I will try this sql request to handle this specific case. Do you think it could be possible to have a OGR_L_GetExtent3D() function which returns, as a default implementation, the OGR_L_GetExtent() result and with 0.0

Re: [gdal-dev] 3D extent

2023-06-23 Thread Even Rouault
Benoit, Indeed OGR_L_GetExtent() will never fill the Z fields, since it has no idea they are there. So a 3D specific function would be needed. But in the case of GeoPackage, as many/most other formats, layer extent metadata doesn't include the Z component either. The generic option is to ite

[gdal-dev] 3D extent

2023-06-23 Thread B. De Mezzo
Hi, I was looking for a solution to retrieve a 3D extent (in my case from a gpkg). Currently, the OGR_L_GetExtent function uses an OGREnvelope and when I pass a OGREnvelope3D parameter, it does not fill the Z fields. What should be the best approach to the minZ and maxZ for a layer? Regards.