[GRASS-user] Raster color always white for null value

[NASAHARA Kenlo]

Moritz:

Thank you! After several trials, I got the desirable result by

GRASS 7.0.4 (latlon):~/ > d.rast -n DSM bgcolor=blue

Both "-n" and "bgcolor=" were necessary.

Kenlo Nasahara


On Wed, 12 Oct 2016 08:44:53 +0200
Moritz Lennert <mlennert at club.worldonline.be> wrote:

> 
> 
> Le 12 octobre 2016 06:43:17 GMT+02:00, NASAHARA Kenlo <24dakenlo at gmail.com> a écrit :
> >Dear GRASS people
> >
> >I am using GRASS 7.0.4 on Ubuntu 14.04.
> >
> >I am trying to display a DSM map (ALOS AW3D) 
> >whose null value covers ocean. I use an original
> >color table like this:
> >
> >GRASS 7.0.4 (latlon):~/ > cat color_DSM.txt 
> >-1000 black
> >0     black
> >100   white
> >1000 white
> >nv blue
> >
> >By running the following commands,
> >GRASS 7.0.4 (latlon):~/ > d.mon start=wx0
> >GRASS 7.0.4 (latlon):~/ > r.colors map=DSM rules=color_DSM.txt 
> >Color table for raster map <DSM> set to 'color_DSM.txt'
> >GRASS 7.0.4 (latlon):~/ > d.rast DSM
> >
> >I got the wx0 window with a greyscale topography as expected,
> >but the ocean looks wite, not blue!
> >
> >I checked that the ocean was certainly covered by NULL (no value)
> >by d.what.rast command and mouse clicks. I also checked the 
> >file containing the color table info: ~/latlon/PERMANENT/colr/DSM
> >% -1000 1000
> >nv:0:0:255
> >-1000:0 0:0
> >0:0 100:255
> >100:255 1000:255
> >
> >which looks OK for nv line.
> >
> >Do you know the reason? If you do, please help me!
> 
> 
> Try d.rast with the -n flag.
> 
> Moritz
> 
> >
> >-- 
> >Kenlo Nishida Nasahara
> >Faculty of Life and Environmental Sciences
> >University of Tsukuba, Japan 305-8572
> >24dakenlo at gmail.com
> >_______________________________________________
> >grass-user mailing list
> >grass-user at lists.osgeo.org
> >http://lists.osgeo.org/mailman/listinfo/grass-user
> 


-- 
Kenlo Nishida Nasahara
Faculty of Life and Environmental Sciences
University of Tsukuba, Japan 305-8572
24dakenlo at gmail.com