Filter species' shapefiles based on its presence, origin, and season

Filter species shapefiles by origin, presence, and seasonal type (following IUCN types: https://www.iucnredlist.org/resources/spatial-data-download, see metadata).

Usage

lets.shFilter(shapes, presence = NULL, origin = NULL, seasonal = NULL)

shapes: Object of class SpatVect or Spatial (see packages terra and sf to read these files) containing the distribution of one or more species. Species names should be stored in the object as BINOMIAL/binomial or SCINAME/sciname.
presence: A vector with the code numbers for the presence type to be considered in the process (for IUCN spatial data https://www.iucnredlist.org/resources/spatial-data-download, see metadata).
origin: A vector with the code numbers for the origin type to be considered in the process (for IUCN spatial data).
seasonal: A vector with the code numbers for the seasonal type to be considered in the process (for IUCN spatial data).

The result is the shapefile(s) filtered according to the selected types. If the filters remove all polygons, the result will be NULL.

Presence codes: (1) Extant, (2) Probably Extant, (3) Possibly Extant, (4) Possibly Extinct, (5) Extinct (post 1500) & (6) Presence Uncertain.

Origin codes: (1) Native, (2) Reintroduced, (3) Introduced, (4) Vagrant & (5) Origin Uncertain.

Seasonal codes: (1) Resident, (2) Breeding Season, (3) Non-breeding Season, (4) Passage & (5) Seasonal Occurrence Uncertain.

More info in the shapefiles' metadata.

Bruno Vilela