This website was created to support post secondary education in Remote Sensing and Earth System Science. Users may download and use any part of the presented material for educational purposes only. No part of this website may be used for commercial purposes. In using the material presented here, we request that you provide due credits to the source: "Polar Remote Sensing, GI, UAF". Some material is taken from other sources which are duly acknowleged. The majority of pages on this website are accessible to individuals with disabilities in accordance with Section 508 of the Rehabilitation Act. If you have accessibility problems, please let us know. Layout for this Web site is provided by Cascading Style Sheets, level 2 (CSS2), for cross-browser, cross-platform compatibility in screen display and print display. The standard for this Web site is XHTML 1.0 Transitional as defined by the W3C. Tags and attributes deprecated in the XHTML 1.0 definitions have not been used. XHTML 1.0, when scripted using structured semantic markup, is fully backwards compatible. The basic underlying idea of our use of XHTML as prescribed by the W3C is to separate content from style and layout. This includes the avoidance of tables used for layout purposes. As each page is edited, it is tested for errors in an HTML validator and corrected. Valid HTML or XHTML and its corresponding Document Type Declaration are necessary for Cascading Style Sheets to be correctly parsed.