From the documentation, I understood 0 is one form of the NULL representation
for the mask, with other values representing non-masked areas.
“Grid cells in the MASK map containing 0 or NULL will replace data with NULL,
while cells containing other values will allow data to pass through unaltered. ”
Sent from Windows Mail
From: jctorres
Sent: Friday, June 20, 2014 1:01 AM
To: Christopher Boscarino, [email protected]
"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 <[email protected]> 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
Sent from Windows Mail
From: Markus Neteler
Sent: Thursday, June 19, 2014 10:21 PM
To: Christopher Boscarino
Cc: [email protected]
Chris,
On Thu, Jun 19, 2014 at 3:32 AM, <[email protected]> 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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