Visit the following websites for related information:

• Canadian Geophysical Data Centre
  http://gdcinfo.agg.emr.ca/gdc/index_e.html
• USGS Crustal Imaging and Characterization
  http://crustal.usgs.gov/
• Satellite Images
  http://aria.arizona.edu/images
  http://www.sseal.utep.edu/~team7/psvhome.cfm
• Geonformatics
  http://geoinformaticsnetwork.org