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Vis > data > datasets > SRTM30_PLUS Topography and Bathymetry

SRTM30_PLUS Topography and Bathymetry

This is a 30 second global elevation (topography and bathymetry) dataset available as a single COARDS compliant NetCDF file. The original dataset is published as separate binary files at the Scripps Institution of Oceanography (http://topex.ucsd.edu/WWW_html/srtm30_plus.html).

The dataset consists of 43200 x 21600 gridpoints with longitudes ranging from -179.9958°E to 179.9958°E and latitudes ranging from 89.9958°N to -89.9958°N (another version is available with latitudes from -89.9958°N to 89.9958°N if that suits your I/O needs better). The elevations are expressed in integer meters with positive values above sea-level and negative values below (-13802 to 8685).

All the relevant files (except the JPEG images in this webpage) are located in /archive/rsz/projects/SRTM30_PLUS (GFDL & AOS only), and in some cases directly linked here. The files are:

  • SRTM30_PLUS.nc
    		•  1.7 GB NetCDF file with 43200 x 21600 gridpoints, longitudes ranging from -179.9958°E to 179.9958°E and latitudes ranging from -89.9958°N to 89.9958°N.
  • SRTM30_PLUS-N2S.nc
    		•  Same data as SRTM30_PLUS.nc but with data re-arranged in memory such that the latitudes decrease from 89.9958°N to -89.9958°N.
  • data/*.srtm
    		•  The original 33 binary files from the authors' website.
  • data/grd2nc.py
    		•  Python script that merged the separated data into a single NetCDF file.
  • img/mkimages.csh
    		•  C-shell script that rendered the images below using Generic Mapping Tools (GMT) version 4.1, epstool and ImageMagick.
  • img/srtm30_plus*.png 
    		•  32 regional PNG images (5400x5400 excluding tick frame, 24-bit, 18-45 MB each) using an equidistant cylindrical projection so the data can be seen completely without distortion. Each PNG image is reproduced here with lossy-compressed JPEG images (2-5 MB each) to make browsing possible for external users. Just click a tile to see the data at full resolution. The filename refers to the image's lower-left corner position.
    go to a higher resolution view at -180E 45N. go to a higher resolution view at -135E 45N. go to a higher resolution view at -90E 45N. go to a higher resolution view at -45E 45N. go to a higher resolution view at 0E 45N. go to a higher resolution view at 45E 45N. go to a higher resolution view at 90E 45N. go to a higher resolution view at 135E 45N.
    go to a higher resolution view at -180E 0N. go to a higher resolution view at -135E 0N. go to a higher resolution view at -90E 0N. go to a higher resolution view at -45E 0N. go to a higher resolution view at 0E 0N. go to a higher resolution view at 45E 0N. go to a higher resolution view at 90E 0N. go to a higher resolution view at 135E 0N.
    go to a higher resolution view at -180E -45N. go to a higher resolution view at -135E -45N. go to a higher resolution view at -90E -45N. go to a higher resolution view at -45E -45N. go to a higher resolution view at 0E -45N. go to a higher resolution view at 45E -45N. go to a higher resolution view at 90E -45N. go to a higher resolution view at 135E -45N.
    go to a higher resolution view at -180E -90N. go to a higher resolution view at -135E -90N. go to a higher resolution view at -90E -90N. go to a higher resolution view at -45E -90N. go to a higher resolution view at 0E -90N. go to a higher resolution view at 45E -90N. go to a higher resolution view at 90E -90N. go to a higher resolution view at 135E -90N.
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    last modified: February 07 2006.
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