Am 12.01.2018 um 11:24 schrieb 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@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.
QGIS (via GDAL) needs a working inverse projection to be defined. Many
exotic projections defined in PROJ.4 fail therefore.
I guess the +proj=pipeline definitions spoil that requirement. I'm not
even sure if those work in command-line GDAL.
Greetings,
Andre Joost
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