Probably a dumb question, but I really can't see how to do it. I am working with the LandScan 2001 worldwide population database (www.ornl.gov/gist), a 30 second population map for the whole world. In its original form this consists of a raster of 43200 by 21600 cells with estimated population counts. I want to resample to rasters with grid sizes of 1, 2 4 and 8 minutes (21600*10800, 10800*5400 etc). Each grid cell of a new maps should contain the sum of the four cells of the underlying higher resolution map. How do I do this? r.resample uses the nearest neighbour to compute the value of the new raster map; r.neighbours only works for regions with uneven size, and r.mapcalc resamples the input map (with nearest neighbour) *before* actually applying its operators. I just want to compute a new map based on data from a map with a different resolution.
What am I overlooking?
Jan Hartmann
Hi !
I would like to know if exists some Studies Center or Research Groups in
European Universities that work and develop GIS GRASS. If somebody knows
then I would be very grateful for the contribution and the indication of the
University or Center of Studies.
Very Thanks!
André Vinícius dos Santos
University Catholic of Pelotas, Computer science
Pelotas, RS,Brasil
On Mon, Apr 28, 2003 at 10:56:09PM -0300, André Vinícius dos Santos wrote:
I would like to know if exists some Studies Center or Research Groups in
European Universities that work and develop GIS GRASS. If somebody knows
then I would be very grateful for the contribution and the indication of the
University or Center of Studies.
There are several.
E.G. check the webpages of the last (internationl) GRASS user
conference which took place in Italy:
http://www.ing.unitn.it/~grass/conferences/GRASS2002/home.html
Especially the papers should give you a couple of addresses.
You can also try to contact the local GRASS user groups in Europe.
http://grass.baylor.edu/usergroups.html
Especially the ones in Italy, Germany, Poland and Russia (depending
on your definition of Europe. )
Bernhard