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add data web based search tool: GeoWeb Search Tool for ArcGIS: download/install create account general help census help Teaching + Learning Maps + Mapping Social Science Data Services US Census GIS Lab Rotch Library, building 7-238 Contact Us gishelp(at)mit.edu |
Elevation DataMIT GIS lab users doing projects anywhere in the US, utilize the public domain elevation data from the NED and SRTM most frequently. Note: GIS software makes it easy to generate contour lines at the elevation interval of choice from digital elevation models (DEM). DEMs can also be displayed in 3D and used a surface to drape other layers and images in 3D, when utilizing software such as ArcScene in ArcGIS or PCI Geomatica. Massachusetts/ Boston areaBoston area lidar data from MASSGIS MassGIS 1:5,000 elevation and shaded relief MassGIS point elevation data Statewide mosaic of scanned USGS 7.5 minute quadrangle maps Boston Redevelopment Authority Maps/ Aerial phots - includes links to downloadable 3D cad models United StatesThe National Elevation Dataset (NED) The National Elevation Dataset (NED) is assembled by the U.S. Geological Survey (USGS) using data from the USGS's 7.5-minute and 15-minute digital elevation products. It is a raster product designed to provide National elevation data in a seamless form with a consistent datum, elevation unit,
and projection. As higher-resolution or higher-quality data become available, the NED 1 Arc Second is periodically updated to
incorporate best-available coverage. The NED is available for the conterminous US, HI, Puerto Rico, the American Virgin
Islands, Territorial Islands at a resolution of 1 arc-second (approx. 30 meters) and for Alaska at a
resolution of 2 arc-second (approx. 60m). Free downloads, up to 250 MB increments, are available in the following formats:
ArcGrid, Bil*, TIFF**, GridFloat*** Shuttle Radar Topography Mission (SRTM) The Shuttle Radar Topography Mission (SRTM) is a joint project between NASA and NGA (National Geospatial-Intelligence Agency) to map the world in three dimensions. Flown aboard the NASA Space Shuttle Endeavour February 11-22, 2000, SRTM successfully collected data over 80% of the Earth's land surface, for all area between 60 degrees N and 56 degrees S latitude. Data is available for the USA at a resolution of 1 Arc Seconds (approx. 30 meters). GlobalShuttle Radar Topography Mission (SRTM) downloadable from: http://seamless.usgs.gov or CGIAR Consortium for Spatial Information (use the downloadable kml index file in Google Earth to find your area of interest) or Rotch Library - GIS Collection |CDROM G70.212.E775 2006. Data is available for the world at a resolution of 3 Arc Seconds (approx. 90 meters). GTOPO30- a free global digital elevation model (DEM) with a horizontal grid spacing of 30 arc seconds (approximately 1 kilometer). Also available in Rotch Library - GIS Collection |CDROM G70.212.E775 2005 ETOPO2 Digital Chart of the World - contains files for the world at 1:1,000,000 scale. Elevation points and contour lines are available in the MIT Geodata Repository (catalog ids: int_c28elev_2004 and int_c28contours_2004) and on DVD as part of the "Global planner" dataset: Location Rotch Library - Circulation Desk | DVDROM G3200 2004.T63 |
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