Global datasets: Difference between revisions

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* Some datasource links: http://www.ruf.rice.edu/~ben/gmt.html
* Some datasource links: http://www.ruf.rice.edu/~ben/gmt.html
* The {{cmd|r.in.gdal}} modules may be used to import data of [http://www.gdal.org/formats_list.html many formats], including GMT netCDF
* The {{cmd|r.in.bin}} module may be used to import raw binary files


== LANDSAT ==
== LANDSAT ==

Revision as of 07:40, 11 October 2008

Blue Marble imagery

ETOPO

ETOPO1

Cell registered version can be loaded directly into a lat/lon region.

Grid registered version must be loaded into a simple XY location and have the 90deg N,S rows cropped away:

# create a new simple XY location and mapset

# Import grid registered binary float
r.in.bin -f in=etopo1_bed_g.flt out=etopo1_bed_g \
   n=90.008333333335 s=-90.008333333335 e=180.00833333334 \
   w=-180.00833333334 rows=10801 cols=21601 anull=-9999
r.colors out=etopo1_bed_g color=etopo2

# reduce region by 1 cell
g.region rast=etopo1_bed_g
eval `g.region -g`
g.region n=n-$nsres s=s+$nsres e=e-$ewres -p

# save smaller raster and remove original
r.mapcalc "etopo1_bed_g.crop = etopo1_bed_g"
g.remove etopo1_bed_g

# change the location to lat/lon by restarting GRASS
#  in the PERMANENT mapset and running g.setproj

ETOPO2

ETOPO2v2 data download

GEBCO

  • The General Bathymetric Chart of the Oceans
http://www.gebco.net/data_and_products/gridded_bathymetry_data/

Miscellaneous

  • The r.in.gdal modules may be used to import data of many formats, including GMT netCDF
  • The r.in.bin module may be used to import raw binary files

LANDSAT

MODIS

Pathfinder AVHRR SST

merge that info here?

QuickBird

SeaWiFS

merge that info here?

Smith and Sandwell

SRTM