Opendata, Public domain GIS data and Free GIS data repositories and clearinghouses. Are you still paying commercial data resources for Free, public domain GIS data? If so STOP IT and WAKE UP!
Thursday, November 29, 2007
Michigan DOQQs (2005) from MiGDL
That'sright, all the Michigan 2005 DOQQs are available from the MiGDL - these are part of the NAIP program and provide an excellent base for your GIS project - see also http://www.michigan.gov/cgi
Saturday, November 24, 2007
NAtional Snow and Ice GIs data
The NSDIC provides a number of downloadable GIS data products useful for those mapping sea ice. Grab frozen ground maps, sea ice photos, Antarctica datasets and much more - see http://www-nsidc.colorado.edu/

NAtional Snow and Ice GIs data
USGS land/sea mask dataset
An excellent free, Global data resource... The land/sea mask has been improved and now includes ocean boundaries from the World Vector Shoreline (WVS) data set. The boundaries for U.S. Great Lakes and St. Lawrence seaway come from the Political/Ocean (ponet) layer of the Digital Chart of the World (DCW). The boundaries of inland water bodies come from the perennial water bodies and polygon features (double line rivers) of the Drainage Network (dnnet) layer of the DCW. The land/sea mask has been generalized during the process of rasterizing the vector data to 1-km grid cells. A 1-km cell is assigned to land or water based on the dominant area of a cell. World Vector Shoreline boundaries have precedence over DCW. Grab it at http://edc2.usgs.gov/1KM/land_sea_mask.php
see also Global Land 1-KM AVHRR Project

see also Global Land 1-KM AVHRR Project
USGS land/sea mask dataset
Labels:
free gis data,
Global
Friday, November 09, 2007
Draft Programmatic EIS and Draft Corridor Maps Available
The West-Wide Energy Corridor Draft Programmatic EIS is now available for downloading and browsing online. Draft PEIS maps of proposed Section 368 energy corridors are also available for browsing/downloading.

Draft Programmatic EIS and Draft Corridor Maps Available
Thursday, November 08, 2007
HydroSHEDS rfom WWF
HydroSHEDS is based on high-resolution elevation data obtained during a Space Shuttle flight for NASA's Shuttle Radar Topography Mission (SRTM). HydroSHEDS stands for "Hydrological data and maps based on SHuttle Elevation Derivatives at multiple Scales." At the most basic level, HydroSHEDS will allow scientists to create digital river and watershed maps. These maps can then be coupled with a variety of other geo-spatial datasets or applied in computer simulations, such as hydrologic models, in order to estimate flow regimes. See http://www.worldwildlife.org/freshwater/hydrosheds.cfm

HydroSHEDS rfom WWF
Spatial Information Exchange (SIX)
Data tip -- Need imagery from down-under? The SIX Gateway provides a single entry point through which to search, access and utilise the wealth of geospatial services and data managed by Lands, in many cases free of charge. It also provides opportunities for users to contribute to this state-wide resource. Access cadastre, land titles, and loads of satellite imagery - see http://www.six.nsw.gov.au/

Spatial Information Exchange (SIX)
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