Dear list,
I have a raster array which represents cell phone signal strengths, and would
like to import it into grass 6. Looks like r3.in.ascii might be what I need to
import this raster array, as I would like to display the signal strengths in
different colours. The help documentation on r3.in.ascii seems to be quite
concise. The file nees a header:
north: floating point
south: floating point
east: floating point
west: floating point
top: floating point
bottom: floating point
rows: integer
cols: integer
levels: integer
I'm not sure what the top, bottom and levels values should be. Can someone
pleas elaborate on this? This is what I found in the help files:
This header is followed by the cell values in floating point format organized in
rows with constant col and level coordinate. The rows are organized by constant
level coordinate. Individual cell values are separated by space or CR.
Regards,
Kobus
On Sat, 29 Oct 2005 s99171059@tuks.co.za wrote:
Dear list,
I have a raster array which represents cell phone signal strengths, and
would like to import it into grass 6. Looks like r3.in.ascii might be
what I need to import this raster array, as I would like to display the
signal strengths in different colours. The help documentation on
r3.in.ascii seems to be quite concise. The file nees a header:
Are your data voxels or pixels? r3.* functions are for voxels, and while I
can think of settings where signal strength at altitude over the surface
is useful (high-rise buildings?), I'm not sure that you have voxels. If
you have, then you would have understood that top and bottom are the
vertical z-range of your pile of voxels, like west-east is the x-range,
and levels is the number of voxels in the pile.
north: floating point
south: floating point
east: floating point
west: floating point
top: floating point
bottom: floating point
rows: integer
cols: integer
levels: integer
I'm not sure what the top, bottom and levels values should be. Can someone
pleas elaborate on this? This is what I found in the help files:
This header is followed by the cell values in floating point format
organized in rows with constant col and level coordinate. The rows are
organized by constant level coordinate. Individual cell values are
separated by space or CR.
Regards,
Kobus
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand@nhh.no