The 1990 Geocover set is comprised of orthorectified Landsat satellite image mosaics, that have been processed using spectral band 7 (mid-infrared) as red, band 4 (near-infrared) as green and band 3 (visible green) as blue. The result is a Short-Wavelength Infrared combination, which looks like a a jazzed up true color rendition - one with more striking colors. The images have been tonally balanced, tiled and compressed. File sizes ranging from 6mb to 65mb. An online index map has been provided by NASA.
Satellite / Sensor: Lansat 4 TM or Landsat 5 TM
Projection: UTM WGS 84
Scene Dates: 1990 ±3 years
Composite Bands: SWIR (7,4,2)
Ground pixel resolution: 28.5m
Source format: 'SID' World
Restrictions on Access / Use
This resource is available to University of Western students, faculty and staff for academic, research or personal reasons. Data must be requested in person at the Map Library Reference desk.
This resource can also be downloaded free of charge from NASA. Simply zoom in to the desired tile, check the "Select Tile" radio button and click on the tile to download.
Sample View of the Data
Reykjavík and the Faxaflói Bay Area, Iceland
Similar to Geocover 1990, the Geocover 2000 set is comprised of orthorectified Landsat satellite image mosaics, that have been processed using spectral band 7 (mid-infrared) as red, band 4 (near-infrared) as green and band 3 (visible green) as blue. The result is a Short-Wavelength Infrared combination, which looks like a a jazzed up true color rendition - one with more striking colors. The images have been pan-sharpened, tonally balanced, tiled and compressed. Because of the pan-sharpening process, file sizes are much larger than the Geocover 1990 set, averaging at 100mb per tile. An online index map has been provided by NASA.
Satellite / Sensor: Landsat 7 TM
Projection: UTM WGS 84
Scene Dates: 2000 ±3 years
Composite Bands: SWIR (7,4,2)
Ground pixel resolution: Pan-sharpened to 14.25m
Source format: 'SID' World
Restrictions on Access / Use
This resource is available to University of Western students, faculty and staff for academic, research or personal reasons. Data must be requested in person at the Map Library Reference desk.
This resource can also be downloaded free of charge from NASA. Simply zoom in to the desired tile, check the "Select Tile" radio button and click on the tile to download.
Sample View of the Data
A Portion of Al-Iskandariyah (Alexandria), Egypt
Also from this web page:
Imagery