Online Resources for Information on Remote-Sensing

ERDAS IMAGINE

Accessing the online documentation for IMAGINE via the web is somewhat difficult without an account. You may be able to create one for free; I didn't look into it. If you want to try, visit the Leica Geosystems Web Site. You may also be able to access white papers and their IMAGINE knowledgebase. I don't know of any resources for IMAGINE beyond this.

Accessing help from within the program is relatively easy (simply select "Help" at any of the menus), and the content is very rich.

General Remote Sensing

• Dr. Short's Remote Sensing Tutorial is possibly one of the most frequently used online resources.
• Natural Resources Canada has also published an interesting tutorial on the Fundamentals of Remote Sensing. While much of the content overlaps the above tutorial, it does offer some new information, too.
• The Wikipedia has some detailed information on remote sensing. It also lists several of the sensor platforms with links to more information.
• The Satellite Meteorology section of the Online Remote Sensing Guide has a detailed description of the GOES and POES satellites.*
• Shannon Crum, at U-T Austin, has posted a brief list of some remote sensing technologies in her module on Aerial Photography and Remote Sensing*.
• The Freeware MultiSpec tool is a useful image classifier.

Data Sources

Global Data

• The Global Land Cover Facility is probably one of the best places to find satellite imagery.
• The GeoCommunity offers GIS data downloads from their GIS Data Depot.
• Terraserver provides orthophotos and topo maps.
• The USDA maintains a fairly extensive Spatial Data Library.
• Several topographic data sets are available at the USGS Geographic Data Download site.
• ESRI offers Census Data Layers on their web site.

Indiana Data

• The Indiana Spatial Data Service, hosted through Indiana University, has quite a bit of data available for Indiana.
• Hydrology and biology layers for Indiana are available at the Indiana GIS Atlas.
• Detailed climatological data are available from the Indiana State Climate Office, which is hosted right here at Purdue.

* I haven't actually read the content myself, and therefore cannot vouch for its accuracy.

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