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ETOPO1 Global Topography
1 arc-minute global topography
ETOPO1
is a 1 arc-minute global relief model of Earth's surface that
integrates land topography and ocean bathymetry. It was built from
numerous global and regional data sets, and is available in "Ice
Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock"
(base of the ice sheets) versions. Historic ETOPO2v2 and ETOPO5 global
relief grids are deprecated but still available.
- Metadata: http://www.ngdc.noaa.gov/mgg/global/etopo1sources.html
- Spatial Resolution: 1 arc-minute
- Extent: Global
- Temporal Resolution: N/A
- Date Range: 08/2008
- Format(s): KMZ, netCDF, GRD98, binary float, GeoTiff
- Access
Methods: HTTP/FTP
- Data Access: http://www.ngdc.noaa.gov/mgg/global/global.html
- CoML visualization guidance: TBD
Use Example
Download a cell-registered "Ice Surface"" (top of ice sheets) binary float dataset and convert to ESRI grid in ArcGIS 9.2
- Data Access: http://www.ngdc.noaa.gov/mgg/global/relief/ETOPO1/data/ice_surface/cell_registered/binary_float/etopo1_ice_c.zip (large file ~389MB)
- Data Conversion: These instructions assume local access to ESRI's ArcGIS software - access to ArcGIS via remote desktop is also available.
Download the zip file and unzip.
Using ArcGIS Toolbox find Conversion Tools -> To Raster -> Float to Raster tool.
Specify the ETOPO1 float raster and a raster output file name and run the tool.
Data Management Tools -> Projections and Transformations -> Define Projection
Select -> Geographic Coordinate Systems -> World -> WGS 1984
