[Qgis-user] Using custom projections/transformations from a PROJ.4 init-file

[Kristian Evers]

Hi,

I am trying to define my own "custom projection" by using a PROJ.4 init-file. The reason I want to do that is that I only want to maintain the projections/transformations that I need  in one place instead of many. I find the process a bit frustrating since at first glance it seems to be working, but then when I try to save it and close the custom projection dialog I am told that the definition is invalid. As it can be seen on the screenshot below, when I enter the PROJ.4 parameters - in this case "+init=C:\dev\NordicTransformations\resources\DK:UTM32N" - the test works fine but when I try to save it, I am presented with the message below. Since the test works the problem is not that the file can't be found - it is something else.

I experience the same behavior in both QGIS2 and QGIS3. Is this the intended behavior? Is it by design that I am not able to use init-files or is this simply a bug? Is there a known workaround?

[cid:image001.png at 01D38B96.E25BF930]

There is no errors in the projection setup in the init-file, which the working test transformation proves. The init file in question can be seen here: https://github.com/NordicGeodesy/NordicTransformations/blob/master/resources/DK. I am aware that I can just add the definition of the CRS directly, or simply use epsg:25832. That is not the point. I have other more esoteric transformations in the same file that is more complicated to manage in QGIS itself.

I appreciate any advice and guidance. If this indeed is a bug I will gladly help fix it.

Best regards,
Kristian

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