Units and projection
AccessMod uses formulae that works with variables expressed in the metric system. To avoid any potential consistency issue, it is necessary for all the geospatial data (raster and vector) to be projected in the same metric coordinate system before importing them in AccessMod.
Note
AccessMod will not import a DEM that is not in a metric coordinate system. An error message will appear in this case.
An error message will also appear in case you are trying to import a raster format layer that does not present the same coordinate system as the one of the DEM.
For vector format layers, the GRASS engine used in AccessMod automatically reprojects the data sets to fit the DEM coordinate system if this is not already the case.
Users are strongly encouraged to ensure consistency of the projection parameters across all the input layers before uploading them in AccessMod.