Arizona Regional Image Archive

http://aria.arizona.edu/

Canadian Geospatial Data Infrastructure

http://geodiscover.cgdi.ca/gdp/

Climatology data

http://docs.lib.noaa.gov/rescue/cd013_pdf/00408822.pdf

DEM data of SF Bay Area

http://bard.wr.usgs.gov

Digital Library of India

http://www.digitallibrary.ernet.in/

Earth Explorer

http://earthexplorer.usgs.gov/

Earth Observing System Data Gateway

http://edcimswww.cr.usgs.gov/pub/imswelcome/

Geoscience Australia

http://www.auslig.gov.au/download/#satellite

GIS Data

http://www.gisdatadepot.com

Global Land Cover Facility

http://glcf.umiacs.umd.edu/index.shtml

Global Visualization Viewer

http://glovis.usgs.gov/

Landsat.org

http://www.landsat.org/

Landsat4u

http://www.landsat4u.com/

NASA Image Serve

https://zulu.ssc.nasa.gov/mrsid/

Terraserver

http://www.terraserver.microsoft.com/

Toposheets

http://www.mapmart.com/Topo/Raster.htm

University of Nevada Landsat TM Archive

http://keck.library.unr.edu/data/landsat/pathrow.html

USGS EROS Data Center

http://edcwww.cr.usgs.gov/products/satellite.html

USGS geography products

http://erg.usgs.gov/isb/pubs/pubslists/

USGS with satellite imagery and terrain elevation data

http://www.usgs.gov

Whether and climate related data

http://images.google.co.in/imgres?imgurl=http://climate.engr.uga.edu/maps/physio.gif&imgrefurl=

http://climate.engr.uga.edu/other.html&

h=668&w=526&sz=19&hl=en&start=458&tbnid=3K0T3WsVuv

4dmM:&tbnh=138&tbnw=109&prev=/images%3Fq%3Dremote%2Bsensing2Band%2BGIS%26s