GIS and Other Data

GIS data:


Here are some sources for free GIS data

  • The USGS National Map Viewer – has the national elevation data set, along with imagery and many other data sets (land cover, etc.)
  • The USDA Data Gateway – is an excellent source for digital imagery (aerial imagery, topo maps, etc.).
  • Here is a website with territorial sea GIS data (bathymetry, sidescan sonar, etc.)
  • Here is a website where one may download coastal LiDAR and other topographic data.
  • Natural Earth: public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales.

GIS Data Sets

    Bathymetry/Topography:

  • Here is a *.tiff file for use in the software ArcGIS. These are bathymetric data are at 500m resolution and are for the west coast of the US. (36 MB)
  • Here is a *.tfw file for use in the software ArcGIS. These data are at 500m resolution and are for the west coast of the US. The tfw file is the world file and allows the tiff image to be placed in real world coordinates. (0.067 KB)
  • Here is a *.tif file for use in the software ArcGIS. These are bathymetric data are at 1km resolution and are for the northern Indian Ocean, centered on Sumatra. (208 MB)
  • Here is a *.tif file for use in the software ArcGIS. The tfw file is the world file and allows the tiff image to be placed in real world coordinates. (.071 KB)
  • Here is an *.sd file for use in the software iview3D. These are bathymetric data are at 300m resolution and are for the west coast of the US. (150 MB)
    Topography:

  • 10m DEM: Humboldt County (includes dem, hillshade, and slopes; 1.2 GB zip file)

Software

  • Here is is ESRI’s web site where one can purchase ArcGIS for home use. Remember that ArcGIS is on various computers on campus too! (so you can put your data on a hard drive and view it on campus.)
  • Here is where you can download the free software Iview3D (or Iview4D) to view fledermaus files *.sd or *.scene.

Historic Maps

  • Here is an online map interface that permits one to search for historic maps. The USGS maps are here.

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