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User Manual - pancroma

User Manual - pancroma

User Manual - pancroma

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The Spectral Analyzer TM (menu selection ‘<strong>Manual</strong> Method’) to identify thesepixels can also be used to generate masks for cloud and cloud shadow removal.When this option is selected, a second image is generated where the targetpixels are black rather than red. This image can then be used with PANCROMAGap Fill Transfer Method to substitute pixels from a similar cloud-free image intothe mask.Masks produced by this utility can be applied to multispectral band data using the‘Band Math’ | ‘Boolean AND Two Images’ utility described in Section 50.For additional information, see the White Paper available athttp://www.<strong>pancroma</strong>.com/Landsat%20Spectral%20Signature%20Mask.htmlReading Data from USGS ASCII Spectra FilesThe United States Geological Survey (USGS) publishes several spectral librariesfor a wide variety of mineral and organic materials. These spectra can beaccessed and downloaded from the USGS Spectroscopy Lab website athttp://speclab.cr.usgs.gov/. An example of such a spectrum, for the mineralgalena, is shown below.263

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