[GRASS-user] Raster Mask under version 7 causes map to go white

[jctorres]

"The mask is just 0 and 1’s"
you must use null and non null



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El 20 de junio de 2014 09:33:34 <cboscari en sbcglobal.net> escribio:

> I am not sure what you mean by “query” the map- under 6.4.3, when I open my 
> map with the mask file in my mapset, the map raster appears with the 
> sections I want visible, the sections I don’t want are not visible and 
> excluded from calculations. This is I think the expected behavior?
>
> Under the beta 2 in both Windows and Linux (Ubuntu Trusty) I have tried 
> changing the color table on the underlying map raster  but get the same 
> result- opening the raster with the mask present in the mapset blanks out 
> everything, removing the mask displays the entire raster. The color table 
> I’m using is greyscale. The mask is just 0 and 1’s, but I tried changing 
> the color table there, no difference. If I delete the mask file, the entire 
> underlying raster is displayed.
> I verified the mask does contain both 0’s and 1’s, and like I said, it does 
> work fine under 6.4.
>
> So I am stumped.
> Chris
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> Sent from Windows Mail
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> From: Markus Neteler
> Sent: ‎Thursday‎, ‎June‎ ‎19‎, ‎2014 ‎10‎:‎21‎ ‎PM
> To: Christopher Boscarino
> Cc: grass-user en lists.osgeo.org
>
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> Chris,
>
> On Thu, Jun 19, 2014 at 3:32 AM,  <cboscari en sbcglobal.net> wrote:
> > Hi Everyone,
> >
> > I am having an issue that I can’t seem to resolve using the beta2 version
> > under both Windows or Linux, as well as daily snapshots  under the Ubuntu
> > version.
> >
> > Basically, a raster mask file that I am using under the current version of
> > grass 7 beta  “blanks” out the underlying raster- that is the entire display
> > area is white, although both rasters (my raster map and the mask) appear as
> > layers. If I remove the mask, the map area is again entirely visible.
>
> Did you actually query the map(s)?
>
> > It worked correctly back in December with the stable version as well as the
> > snapshot of version 7 (then). Now the mask only works under 6.4.
> > I am have looked on the website and the documentation to see if there were
> > any changes made to raster masks, but am unable to find any changes.
>
> The raster mask management is pretty much the same for years.
>
> Perhaps it is just related to the color table you use?
>
> Markus
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