[GRASS-user] Problems Running r.flow
rshepard at appl-ecosys.com
Thu Jan 28 11:01:33 EST 2010
On Thu, 28 Jan 2010, Glynn Clements wrote:
> That's a bug in r.flow:
> if (!((region.ew_res == hd.ew_res)
> && (region.ns_res == hd.ns_res)))
> G_fatal_error(_("Elevation file's resolution differs from current region resolution"));
> Try the attached patch. It replaces the exact comparison with a check that
> the resolutions agree to within 1ppm.
Perhaps I've specified the region incorrectly, but the patch makes no
difference. Upon invoking GRASS I run 'g.region rast=aber5m res=5 -ap'
followed by 'r.flow elevin=aber5m aspin=aber5aspect flout=aberFlowline
lgout=aberFlowlength' and immediately see:
ERROR: Elevation file's resolution differs from current region resolution
I'm surprised this issue's not come up before.
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