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Features needed for the road extraction application:

  1. Open an image [Ok]
  2. Choose the input data for the extraction algorithm in one of:
    1. Image intensity [Ok]
    2. Image channel. In this case, select a channel [Ok]
    3. Spectral angle. In this case, select a reference pixel [Ok]
    4. Water index
  3. Tune some parameters: thresholds, resolution, alpha
  4. Run extraction on the full resolution area [Ok]
  5. If area change, run the extraction again and keep previous results
  6. Clear previous results [Ok]
  7. Display thick roads, with thikness related to the alpha and resolution parameter
  8. Display roads in differents color according to the input data they were extracted from (red for spectral angle, blue for water index ...)
  9. Save the results in vector data format [Ok]
  10. Import vector data