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I'm a rather inexperienced GRASS user, and am trying to use an addon module called r.geomorphon (see I've managed to get it installed and am trying to run it, but get an error of:

ERROR: Reading raster map <decal1@PERMANENT> request for row 1 is outside region

and I have no idea what that means. From the Googling that I've done it seems that this error can be caused by some commands when the vector data doesn't overlay the raster data properly - but this routine only uses a single raster DEM file as input. Does anyone have any idea why this might be caused, or do I need to go directly to the author of the addon?

In case it affects things, I'm using a simple arbitrary location, as this DEM was generated by a computer model and therefore only has arbitrary X and Y co-ordinates.

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closed as too localized by underdark Nov 21 '12 at 14:00

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

have you run g.region rast=decal1 before running the module g.geomorphon? – dmci Nov 20 '12 at 18:06
Oops - I didn't do that. Thank you. – robintw Nov 20 '12 at 22:24

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