GEOG 121 Project 4:
Finding Landsat Data


Janet Beekman

The image shown above is a landsat image made from the Landsat 7 Enhanced Thematic Mapper plus(ETM+) satellite sensing system. I acquired this "browse image" from the USGS's Earth Explorer website(http://earthexplorer.usgs.gov). The Landsat scene that I selected is of State College, PA because this is my home town. I also selected this particular image because of all the images of State College that were available, this one had the least amount of cloud cover. The metadata associated with the scene is shown at metadata.htm The image acquisition date is November 3, 2003, the WRS Path is 16 and the WRS Row is 32. The WRS stands for World Reference System. Row is the east to west data. The Path is the north to south data. The image cloud cover attribute is 11 which was smallest compared to other images of State College. The center coordinates of the scene are 40'20'44'N, 78'01'59'W. The extend of the scene is as follows: The NW Corner is 41'18'42'N, 78'53'47'W; the NE corner is 40'59'06'N, 76'39'23'W; the SW corner is 39'41'14'N, 79'23'12'W; and the SE corner is 39'22'06'N, 78'01'59'W. State College is located at 40'47'36'N, 77'51'37'W. State College is in the middle of the northern sections. The area covered is relatively small about 1 to 2 degrees. The cost of the actual Landsat scene is about $600. The difference between the actual Landsat data and the "browse image" I show in this report is as follows: The actual Landsat data comes directly from the satellites while the "browse image" is an interpretation of the satellite image.
Sources
DiBiase, David (2004) Understanding Geographic Data. Module 5: Remotely Sensed Image Data. ESRI Virtual Campus http://campus.esri.com Accessed 31 October 2004.
National Aeronautics and Space Administration (2004) Landsat 7 Science Data Users Handbook. http://ltpwww.gsfc.nasa.gov/IAS/handbook/handbook_toc.html Accessed 31 October 2004.
United States Geological Survey (2004) EarthExplorer. http://earthexplorer.usgs.gov Accessed 31 October 2004.