G'day all,
I have tried to search for this, but the only chain I found included some off-list component, and I'm not sure what actually happened.
I have not been able to import GPW data into GRASS successfully.
I am downloading data from http://sedac.ciesin.columbia.edu/gpw/global.jsp
I have downloaded the .bil, the ascii grid and the ESRI GRID data types for population count and population density at different resolutions and viewed them in QGIS - there was no real problem once I had changed the colourmap. It appears that there is a completely way out value in the millions range, although most of the data is less than a thousand. I have viewed the .ascii file and can see that there are plenty of values.
for example
r.in.gdal -o input=/Users/benmadin/Spatial/raster/gl_gpwfe_pcount_10_bil_25/glp10ag.bil output=glp10ag
WARNING: Over-riding projection check
100%
r.in.gdal complete. Raster map <glp10ag> created.
r.univar glp10ag
100%
total null and non-null cells: 29652480
total null cells: 29652480
Of the non-null cells:
----------------------
n: 0
minimum: nan
maximum: nan
range: nan
mean: nan
mean of absolute values: nan
standard deviation: nan
variance: nan
variation coefficient: nan %
sum: 0
when I use r.in.gdal (or r.in.arc or r.in.bin) they all seem to work without trouble. They also work fine for gridded livestock of the world data, or worldclim data.
r.univar tmin1.bil
100%
total null and non-null cells: 29652480
total null cells: 20297072
Of the non-null cells:
----------------------
n: 9355408
minimum: -547
maximum: 266
range: 813
mean: -71.4324
mean of absolute values: 196.981
standard deviation: 214.727
variance: 46107.5
variation coefficient: -300.601 %
sum: -668279360
Is there anyone else who has been able to successfully import gpw data to grass. If I wasn't able to display it in QGIS I would just give up, but there must be something going on (both my QGIS and GRASS are using the same versions of GDAL etc)
cheers
Ben