Land cover

Description
In this step, user must select natural and semi-natural environments from input land cover layer classes.

Parameters
Input layer contains land cover data, in vector or raster format. It must cover the whole study area, and data is clipped according to extent layer (specified in parameters tab).
Selection mode By field values automatically extracts land cover classes from specified Selection field. User can specify class Description field if existing in input layer.
Press Show field values to display selected field values in visualisation table. In this table, user must check classes matching natural and semi-natural environments. Unchecked classes are considered as fragmentation data.
If selection criteria is more complex (depending on several fields for instance), By expression mode must be used and corresponding expression specified.

Results
Press Launch selection to select and agregate selected classes.
In vector mode, features are selected and then dissolved (dissolve process can be very slow for huge territories). In raster mode, layer is reclassified and warped according to parameters.
Result layer is loaded in QGIS.