The files in this folder are Landsat 5 TM satellite images. The files are coded by name. r = basic rectification of the original product received from USGS (Level 1G). Pixel values are raw values (Digital Numbers). Rectification based on NAIP 2004 imagery using Nearest Neighbour resampling (1st order transformation, RMSE = 10.42 m)) . ra = is the product from "r" above, but including a Cos(t) atmospheric correction (Chavez 1996). Correction was peformed with Idrisi Andes using LMin/Lmax data found in the Landsat (LT5039030000627610_WO.txt) file provided by USGS. All files are stored in Geo-tiff file. All files have been projected into IDTM 83.