[mapserver-dev] WCS RESPONSE_CRS and BBOX projection

[Tamas Szekeres]

Folks, WCS gurus,

I'm quite suffering from a problem that have been discovered 4 years
ago in the following bug:
https://trac.osgeo.org/mapserver/ticket/656

Actually I'm using CRS and RESPONSE_CRS in parallel and specifying the
BBOX according to the EPSG passed in the CRS parameter.
In this case the map projection corresponds to the RESPONSE_CRS
setting and therefore the BBOX should be projected from CRS to
RESPONSE_CRS before creating the image.

My additional issue is that I intend to pass RESX and RESY (related to
the CRS) instead of HEIGHT and WIDTH and want to preserve the
resolution regardless of the
change in the RESPONSE_CRS setting. Therefore the resx and resy should
also recalculated between the spatial reference systems.

I've attached a patch to the ticket above that corresponds with my
requirements, however I'm not sure in that all of the implications
have properly been considered
https://trac.osgeo.org/mapserver/attachment/ticket/656/mapwcs.c.patch

Is this change reasonable and compliant with the WCS specs?


Best regards,

Tamas