I am very new to QGIS and I am trying to determine the spatial projection and the units of distance of a certain raster file. The closest thing I can find is the CRS, which is set to some sort of custom value of USER:100000. However, I'm not sure if that's what I'm supposed to be looking for.

Also, if that is what I'm looking for, how do I determine the units of distance from the file?

  • 1
    Is the raster in a projection, or put another way is it actually georeferenced? You don't give any details of the raster - format, if it's a single file or has accompanying files, etc.
    – Chris W
    Feb 19, 2015 at 21:55

1 Answer 1


The easiest way to get the projection information is Rightclick -> Set CRS for Layer.

This will report the USER:100000 you already know, and the parameters for the projection as well.

+units=... will give you the units of the projection.

  • Okay, so USER:100000 is the projection? I thought there would be something that identified it as a UTM projection or other type of projection.
    – QGIS Noob
    Feb 19, 2015 at 20:15
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    It is the custom projection that QGIS has created because it could not identify it as one of the official EPSG definitions. If you look under Settings -> Custom CRS, you will see the full definition, something like +proj=lcc +lat_1=50 +lat_2=50 +lat_0=50 +lon_0=-107 +x_0=5632642.22547 +y_0=4612545.65137 +datum=WGS84 +units=m +no_defs.
    – AndreJ
    Feb 20, 2015 at 4:49

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