3.4.4.6. Spectral distance

_images/spectral_distance_tab.jpg

spectral_distance Spectral distance

This tab allows for calculating the spectral distance between every corresponding pixel of two band sets. The output is a raster containing the spectral distance of each pixel. Optionally, a threshold can be defined for creating a binary raster (0-1) of values below and above the threshold.

This tool supports virtual raster output; if the output file name ends with .vrt then the output is created as virtual raster composed of as many .tif files as the number of CPU threads defined in System; for large rasters this can speed up the process.

3.4.4.6.1. Spectral distance of band sets

  • Select first input band set input_number: select the first input Band set;
  • Select second input band set input_number: select the second input Band set;
  • Distance algorithm radiobutton Minimum Distance radiobutton Spectral Angle Mapping: select Minimum Distance or * Spectral Angle Mapping for spectral distance calculation;
  • checkbox Distance threshold input_number: if checked, a binary raster of values below and above the threshold is created;
  • BATCH batch_tool: add this function to the Batch;
  • RUN run: choose the output destination and start the calculation;