Landsat Thematic Mapper (TM)
acquired on 1 June 1990 was obtained from GLCF
(Global Land Cover Facility) at
http://glcfapp.umiacs.umd.edu:8080/esdi/index.jsp and
Landsat Enhanced Thematic Mapper (ETM+) acquired on
27 August 2006 was purchased from the United State
Geological Survey (USGS).