[QGIS-Developer] QGIS WCS is requesting FULL dataset?

[Richard Duivenvoorde]

Hi,

using our national DEM WCS:

https://geodata.nationaalgeoregister.nl/ahn3/wcs?

Loading the layer ahn3_5m_dtm for an area of a couple of km in
epsg:28992 is very slow.

I'm not so familiar with the WCS specs, but I see QGIS asking:

https://geodata.nationaalgeoregister.nl/ahn3/wcs?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GEOTIFF_FLOAT32&COVERAGE=ahn3_5m_dtm&BBOX=10000,250000,356250,618750&CRS=EPSG:28992&RESPONSE_CRS=EPSG:28992&WIDTH=10&HEIGHT=10

which is the whole of the Netherlands (in a 10x10 pixel output??) and
after that a more proper bbox.

Is this supposed to go like this?
I reckon that (if the WCS data does not have overviews), loading the
whole dataset all the time is pretty intensive.

Anybody more familiar with this can tell something about this?

Regards,

Richard Duivenvoorde