[GRASSLIST:991] r.surf.idw?

GRASS GRASS user
1

Hi all, I have a 10m DEM that I would like to turn into a 1m DEM. However I
don't want to have a bunch of 10m wide blocks. Ideally I would like to smooth
the data (I realize that the data will be fake). I tried r.surf.rast, with
various average distances (12, 100, 1000), but nothing ever changed. When I
look at the new DEMs, the 10m wide pixel is still there, just as a 10 x 10
matrix of cells all with the same value. I made sure that my region is set at
1m, and my raster is sampled at 1m. It seems that there is an easy way to do
this, any suggestions? I am running GRASS 5 (Open OSX) on Mac 10.2.6.

Thanks,
Ian

2

try:

g.region res=10
r.to.sites
g.region res=1
s.surf.rst or s.surf.idw

Hi all, I have a 10m DEM that I would like to turn into a 1m DEM.
However I don't want to have a bunch of 10m wide blocks. Ideally I
would like to smooth the data (I realize that the data will be fake).
I tried r.surf.rast, with various average distances (12, 100, 1000),
but nothing ever changed. When I look at the new DEMs, the 10m wide
pixel is still there, just as a 10 x 10 matrix of cells all with the
same value. I made sure that my region is set at 1m, and my raster is
sampled at 1m. It seems that there is an easy way to do this, any
suggestions? I am running GRASS 5 (Open OSX) on Mac 10.2.6.

3

Is there any wat to have GRASS plot vector maps with colours assigned by
attribute, instead of one colour for the map?

While v.extract can be used to break a vector map into new sub-maps which
can them be plotted in specified colours, I'd like to be able to assign
colours as for rasters, so vectors can be coloured by category or
attribute. My current interest is in being able to use the same colormap
for contours as are assigned to the raster map the contours are derived
from.

Is there a simple way to assign a color palette to a GRASS vector map?

4

Is there any wat to have GRASS plot vector maps with colours assigned
by attribute, instead of one colour for the map?

While v.extract can be used to break a vector map into new sub-maps
which can them be plotted in specified colours, I'd like to be able to
assign colours as for rasters, so vectors can be coloured by category
or attribute. My current interest is in being able to use the same
colormap for contours as are assigned to the raster map the contours
are derived from.

Is there a simple way to assign a color palette to a GRASS vector map?

Individual vectors can be displayed with d.vect.line:

d.vect.line map=contours color=white catnum=-200,-100,0
d.vect.line map=contours color=128:128:128 catnum=-150,-50
d.vect.line map=contours color=green catnum=100,200

Or coloured according to a legend file with d.vect.line legend=xxxx

d.vect.area has similar options.

Hamish