Global datasets: Difference between revisions

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(→‎LANDSAT: yay free data)
(split into rast/vect sections, add GSHHS link)
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== Blue Marble imagery ==
== Raster data ==
 
=== Blue Marble imagery ===


NASA's Blue Marble is a 500m-8 degree per-cell world wide visual image of the Earth from space, with the clouds removed.
NASA's Blue Marble is a 500m-8 degree per-cell world wide visual image of the Earth from space, with the clouds removed.
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* see the [[Blue Marble]] wiki page
* see the [[Blue Marble]] wiki page


== ETOPO ==
=== ETOPO ===


The ETOPO datasets provide global topography and bathymetry at 1', 2', and 5' per-cell resolutions.
The ETOPO datasets provide global topography and bathymetry at 1', 2', and 5' per-cell resolutions.


=== ETOPO1 ===
==== ETOPO1 ====


* http://www.ngdc.noaa.gov/mgg/global/
* http://www.ngdc.noaa.gov/mgg/global/
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  #  and manually edit the $MAPSET/cellhd/ files (dirty!)
  #  and manually edit the $MAPSET/cellhd/ files (dirty!)


=== ETOPO2 ===
==== ETOPO2 ====


* See the ETOPO2 (2' global) article by M.H. Bowman in the [http://grass.itc.it/newsletter/GRASSNews_vol1.pdf GRASS Newsletter, 1:8-11, August 2004].
* See the ETOPO2 (2' global) article by M.H. Bowman in the [http://grass.itc.it/newsletter/GRASSNews_vol1.pdf GRASS Newsletter, 1:8-11, August 2004].
: [http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html ETOPO2v2 data download]
: [http://www.ngdc.noaa.gov/mgg/fliers/01mgg04.html ETOPO2v2 data download]


== GEBCO ==
=== GEBCO ===


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


== Miscellaneous ==
=== Miscellaneous ===


* Some datasource links: http://www.ruf.rice.edu/~ben/gmt.html
* Some datasource links: http://www.ruf.rice.edu/~ben/gmt.html
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* The {{cmd|r.in.bin}} module may be used to import raw binary files
* The {{cmd|r.in.bin}} module may be used to import raw binary files


== LANDSAT ==
=== LANDSAT ===


Since October 1, 2008 all Landsat 7 ETM+ scenes held in the [http://landsat.usgs.gov/ USGS EROS archive] are available for download at no charge.
Since October 1, 2008 all Landsat 7 ETM+ scenes held in the [http://landsat.usgs.gov/ USGS EROS archive] are available for download at no charge.
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* Download via the USGS's [http://edcsns17.cr.usgs.gov/EarthExplorer/ EarthExplorer] interface
* Download via the USGS's [http://edcsns17.cr.usgs.gov/EarthExplorer/ EarthExplorer] interface


=== Modules ===
==== Modules ====


* {{cmd|r.in.gdal}} - Main import tool for complete multiband scenes
* {{cmd|r.in.gdal}} - Main import tool for complete multiband scenes
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* {{cmd|i.landsat.rgb}} - Color balancing/enhancement tool
* {{cmd|i.landsat.rgb}} - Color balancing/enhancement tool


== MODIS ==
=== MODIS ===


* see the [[MODIS]] wiki page
* see the [[MODIS]] wiki page


== Pathfinder AVHRR SST ==
=== Pathfinder AVHRR SST ===


* see the [[MODIS#Pathfinder_SST]] wiki page
* see the [[MODIS#Pathfinder_SST]] wiki page
: ''merge that info here?''
: ''merge that info here?''


== QuickBird ==
=== QuickBird ===


* Wikipedia's {{wikipedia|QuickBird}} entry
* Wikipedia's {{wikipedia|QuickBird}} entry
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* Import with the {{cmd|r.in.gdal}} module
* Import with the {{cmd|r.in.gdal}} module


== SeaWiFS ==
=== SeaWiFS ===


* see the [[MODIS#SeaWiFS]] wiki page
* see the [[MODIS#SeaWiFS]] wiki page
: ''merge that info here?''
: ''merge that info here?''


== Smith and Sandwell ==
=== Smith and Sandwell ===


* Merge info here from the [[Marine Science]] wiki page
* Merge info here from the [[Marine Science]] wiki page


== SRTM ==
=== SRTM ===


* see the {{cmd|r.in.srtm}} module
* see the {{cmd|r.in.srtm}} module




== VMap0 ==
== Vector data ==
 
 
=== GSHHS World Coastline ===
 
GSHHS is a high resolution shoreline dataset. It is in the public domain. The shorelines are constructed entirely from hierarchically arranged closed polygons. It is closely linked to the [[GMT]] project.
 
* Download data from http://www.soest.hawaii.edu/wessel/gshhs/gshhs.html
* Import with v.in.gshhs module for GRASS 5
: ''how for GRASS 6?''
 
 
=== VMap0 ===


1:1 million vector data. Formerly known as ''Digital Chart of the World''
1:1 million vector data. Formerly known as ''Digital Chart of the World''


* see the two articles in [http://grass.osgeo.org/newsletter/index.php ''GRASS Newsletter vol. 3 (June 2005)'']
* see the two articles in [http://grass.osgeo.org/newsletter/index.php ''GRASS Newsletter vol. 3 (June 2005)'']

Revision as of 02:43, 28 October 2008

Raster data

Blue Marble imagery

NASA's Blue Marble is a 500m-8 degree per-cell world wide visual image of the Earth from space, with the clouds removed.

ETOPO

The ETOPO datasets provide global topography and bathymetry at 1', 2', and 5' per-cell resolutions.

ETOPO1

The cell registered version can be loaded directly into a lat/lon region. GRASS raster data is cell registered (see the GRASS raster semantics page)


The grid registered version must be loaded into a simple XY location using the parameters found in the .hdr file, and needs to 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
#  or move the entire mapset into a lat/lon location
#  and manually edit the $MAPSET/cellhd/ files (dirty!)

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

Since October 1, 2008 all Landsat 7 ETM+ scenes held in the USGS EROS archive are available for download at no charge.

  • Download via the Glovis online search tool (req. Java)
  • Download via the USGS's EarthExplorer interface

Modules

  • r.in.gdal - Main import tool for complete multiband scenes
  • r.in.wms - Download data covering current map region via WMS server
  • r.in.onearth - WMS frontend for NASA's OnEarth Global Landsat Mosaic
  • i.landsat.rgb - Color balancing/enhancement tool

MODIS

Pathfinder AVHRR SST

merge that info here?

QuickBird

SeaWiFS

merge that info here?

Smith and Sandwell

SRTM


Vector data

GSHHS World Coastline

GSHHS is a high resolution shoreline dataset. It is in the public domain. The shorelines are constructed entirely from hierarchically arranged closed polygons. It is closely linked to the GMT project.

how for GRASS 6?


VMap0

1:1 million vector data. Formerly known as Digital Chart of the World

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