Spatial overlap between GIFT polygons and external polygons

Calculate the spatial overlap between GIFT polygons and shapefiles coming from other resources

Usage

GIFT_overlap(
  resource = "glonaf",
  GIFT_version = "latest",
  api = "https://gift.uni-goettingen.de/api/extended/"
)

Arguments

resource: A character string indicating from which resource the spatial overlap is calculated. Available options are glonaf and gmba. glonaf stands for Global Naturalized Alien Flora and gmba for Global Mountain Biodiversity Assessment.
GIFT_version: character string defining the version of the GIFT database to use. The function retrieves by default the latest stable version. If set to beta, the most up-to-date version which is still subject to changes and edits is used.
api: character string defining from which API the data will be retrieved.

Value

A data frame with the spatial overlap.

Details

The columns of the data.frame are the following:

entity_ID - Identification number of the GIFT polygon
glonaf_ID (or gmba_ID) - Identification number of the polygon from the other resource
overlap12 - Spatial overlap in percentage between GIFT polygon and the external polygon
overlap21 - The other way around

References

 Denelle, P., Weigelt, P., & Kreft, H. (2023). GIFT—An R package to
 access the Global Inventory of Floras and Traits. Methods in Ecology
 and Evolution, 14, 2738-2748.
 https://doi.org/10.1111/2041-210X.14213

 Weigelt, P, König, C, Kreft, H. GIFT – A Global Inventory of Floras and
 Traits for macroecology and biogeography. J Biogeogr. 2020; 47: 16– 43.
 https://doi.org/10.1111/jbi.13623

Examples

# \donttest{
glonaf <- GIFT_overlap(resource = "glonaf")
#> You are asking for the latest stable version of GIFT which is 3.1.
gmba <- GIFT_overlap(resource = "gmba")
#> You are asking for the latest stable version of GIFT which is 3.1.
# }