Thanks Jeff

I have used the build in network logger available in new versions of QGIS ( I think you can activate it by pressing F12) a lot. That has been essential for me to understand whats going on, especially when I was debugging time dimension in some other setup.

I revisited the wms-server doc you suggested and from that I added UNITS DD, and after that it seems to work. But the catch is I really don't understand why. But I guess mapserver needs to know the units of the original extent when requesting various other projections.

And I love the 'AUTO' as I have tens of thousands of images, all with different projection! So even if it will cost me my sanity i think I will go with that :-)

Trygve

Den 2022-05-19 16:10, skrev Jeff McKenna:
Hi Trygve,

You can examine the problem QGIS GetMap request closely, through the
Network Logger (it's really a saviour)
https://github.com/mapserver/mapserver/wiki/Get-the-Raw-WMS-Request-Generated-by-QGIS

Then you can go back to review the trusty WMS Server document, and
make sure you have set the required metadata:
https://mapserver.org/ogc/wms_server.html

(which also means to remove all warnings from your GetCapabilities response)

But that QGIS network logger is your lifeline :)

Hope that gets you started,

PS. I never use 'auto', ever, never, it's my own rule and that's how I
keep my sanity and avoid these issues, ha.  But others like it.  I
only speak for myself here.

-jeff



--
Jeff McKenna
GatewayGeo: Developers of MS4W, MapServer Consulting and Training
co-founder of FOSS4G
http://gatewaygeo.com/



On 2022-05-19 10:26 a.m., Trygve Aspenes wrote:
Hi

I got a geotiff raster with a projection which is not an EPSG code, so in the mapfile I use AUTO in the layer projection. This also means I skip the extent and projection in map level in the mapfile. In one client this works fine ( this client request epsg:3857 and this looks fine to me)

But in QGIS, this does not work nor any other projections.

Then I add EXTENT and PROJECTION in my mapfile like this:
MAP
....
   EXTENT -56.6378419 31.5007307 95.025531 84.6828537
   PROJECTION
     "init=epsg:4326"
   END
....
END

And then EPSG:4326 works in QGIS also. But if I try to change the projection i qgis, eg to EPSG:3857, this does not work in QGIS, even if it still work in my other client.

So what is it that I don't understand about EXTENT and PROJECTION. I have looked at the documentation https://mapserver.org/mapfile/projection.html#important-notes and and as far as I can understand from the second bullet point the projection definition at map level can be looked as the outgoing projection with the extent accordingly.

What do I need to do to make QGIS be able to use other projections as well?

I do have a link to my getcapabilities document, but hesitates to put it here.

Trygve Aspenes




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