User Manual - pancroma

RapidEye ® Spectral Analyzer TMSpectral analysis using the five bundled RapidEye multispectral bands in GeoTiffformat can be done by selecting Select ‘File’ | ‘Open and opening the singleGeoTiff file that contains the five multispectral bands. Now select ‘SpectralAnalysis’ | ‘RapidEye Spectral Analyzer’ | ‘Five (Bundled) 16-Bit GeoTiff Bands’.Select either the ‘Manual Method’, Euclidean Distance or Spectral Anglemethods, setting the selection criteria as described in previous sections.MODIS Spectral Analyzer TMSpectral analysis using the seven bundled MODIS multispectral bands in HDFformat can be done by selecting Select ‘File’ | ‘Open and opening the single HDFfile that contains the five multispectral bands. Now select ‘Spectral Analysis’ |‘MODIS Spectral Analyzer’ | ‘Seven (Bundled) 16-Bit HDF Bands’. Select eitherthe ‘Manual Method’, Euclidean Distance or Spectral Angle methods, setting theselection criteria as described in previous sections.Euclidean Distance Spectral Analyzer TMThe previous methods require setting the spectral selection criteria manually interms of the reflectance levels and “greater than” or “less than” slider settings.An alternative way to match spectral signatures is distance minimization. In thistechnique, the multispectral band data is considered an n-dimensional vector,with n being the number of available spectral bands. This is the so-calledhypercube approach, i.e. three orthogonal vectors defining the edge of astandard cube and additional orthogonal vectors defining a hypercube.The method computes the distance between each multispectral reflectancevector and the target vector defined by spectral signature you are trying to match.At this time, the target vector can be entered into the Spectral Criteria formautomatically, using the Point Spectrum Generator TM . In this case, you mustclick on representative target pixels as described above. When you compute yourspectrum, the average reflectance values will be automatically entered into theSpectral Criteria sliders. You must select ‘Close Graphics Window and Reset’and then re-open your multispectral band files.To conduct a distance match, first open either six or seven Landsat DN bandfiles. Then select ‘Spectral Analysis’ | ‘Landsat Spectral Analyzer’ | ‘Six/SevenDN Bands’ | ‘Euclidean Distance’. (See the subsection entitled Landsat DN PointSpectrum Generator TM for information on how to preprocess the TIR band if youdecide to use it.The Spectral Criteria Form will not become visible. If you are entering datamanually, use the band sliders for bands 1,2,3,4,5 and 7, input the reflectancevalues for the target vector taken from the spectrum of interest. If you used the248