User Manual - pancroma

0.263600 0.024684 0.0010550.268600 0.026923 0.0010520.273100 0.025821 0.0010870.277100 0.025812 0.0011070.281100 0.027588 0.001135(Note that the asterisks mean missing data.)PANCROMA TM can read reflectance data from such files an insert that dataautomatically into the Spectral Criteria form for subsequent analysis. In order todo so, first download the ASCII spectrum for the material you are interested in.Save it in the default .txt text file format. Next start PANCROMA TM and select‘File’ | ‘Open’ and open the file. Next, select ‘Spectral Analysis’ | ‘Read Spectrumfrom USGS ASCII File’.You must click the submenu selection for the type of data that you will be usingfor your subsequent analysis, for example Landsat ETM+. Note that there aretwo options for Landsat ETM+, depending on whether you intend to use theThermal Infrared (TIR) band or not. If you decide to use the TIR band, you willhave to input it manually into the Spectral Criteria form as the basic USGSspectral libraries do not include any TIR information.When you click on the submenu, PANCROMA TM will search the file for the bandwavelengths, and will extract the corresponding reflectances. It will place thesereflectances into the Spectral Criteria form. They can then be conveniently usedfor either Manual or Euclidean Distance analysis.Note that the band sensors are sensitive across a narrow range of wavelengths.will look up the reflectance that corresponds to the midpoint of the band. Forexample, the Landsat band1 reflectance will correspond to a wavelength of0.4825 microns. The band reflectances for the mineral augite are showntabulated below as reported to the text screen.File opened successfullyWavelength: 0.483300 Reflectance: 0.154771Wavelength: 0.565300 Reflectance: 0.175869Wavelength: 0.661700 Reflectance: 0.153826Wavelength: 0.828000 Reflectance: 0.133775Wavelength: 1.654500 Reflectance: 0.254075Wavelength: 2.215000 Reflectance: 0.381393Spectrial Criteria form is populated.When you click ‘Close Graphics Window and Reset’ and then start a LandsatEuclidean Distance analysis, the reflectances will already be inserted into thereflectance value track bars, as shown in the image below.265