Some preferences can be defined under the menu Options > Preferences:

  • Options for data storage

    • Split data in rows of x meters: There is normally no need to change this parameter. You can reduce this value only if you have memory issues when formatting data (default: 1000).

    • Ratio for DEM overview: You can change this value when the display of the DEM is not adapted (default: 10).

  • Options for the processing

    • Number of threads to use: You can choose how many threads Flow-R can use. You can set -1, which let Matlab choose (default: -1).

    • Susceptibility threshold: The susceptibility threshold has a significant impact on the processing time, but also on the resulting extent. Please check the reference paper for more information (default: 0.0003).

    • Allow reordering of the active cells: This option should be more efficient in terms of processing time, and do not change the results (default: yes).

  • KML (Google Earth) output options

    • Enable KML output: KML exporting is experimental and does not work well for every place in the World. In some locations, a shift can exist in between the results and the terrain. Moreover, it is very time consuming (default: no).

    • Layer opacity: Opacity of the generated KML layer (default: 90).

    • Color factor for susceptibility: Adjustment of the colors for the susceptibility (default: 3).

    • Color factor for energy: Adjustment of the colors for the energy (default: 1).