Description Usage Arguments Value References Examples
A data.frame is returned as grid cells by species with values in each cell being the number of occurrences of each species. No null (all zero) species should be returned. The coordinates returned are the TOP-LEFT corner of the grid cell.
1 2 | sites_by_species(taxon, wkt, gridsize = 0.1, SPdata.frame = FALSE,
verbose = nbn_config()$verbose)
|
taxon |
string: the identifier to get the species data from the nbn biocache. E.g. "genus:Macropus". See |
wkt |
string: Bounding area in Well Known Text (WKT) format. E.g. "POLYGON((-3 56,-4 56,-4 57,-3 57,-3 56))". |
gridsize |
numeric: size of output grid cells in decimal degrees. E.g. 0.1 (=~10km) |
SPdata.frame |
logical: should the output be returned as a SpatialPointsDataFrame of the sp package? |
verbose |
logical: show additional progress information? [default is set by nbn_config()] |
A dataframe or a SpatialPointsDataFrame containing the species by sites data. Columns will include longitude, latitude, and each species present. Values for species are record counts (i.e. number of recorded occurrences of that taxon in each grid cell). The guid
attribute of the data frame gives the guids of the species (columns) as a named character vector
Associated web services: https://layers.nbnatlas.org/ws
http://www.geoapi.org/3.0/javadoc/org/opengis/referencing/doc-files/WKT.html
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | ## Not run:
# Otters in Scotland based on a 0.1 degree grid
ss <- sites_by_species(taxon="genus:Leutra",wkt="POLYGON((-3 56,-4 56,-4 57,-3 57,-3 56))
",gridsize=0.1,verbose=TRUE)
head(ss[,1:6])
# equivalent direct POST webservice call:
# https://layers.nbnatlas.org/ws/sitesbyspecies?speciesq=genus:Viola&qname=data&
# area=POLYGON((-3%2056,-4%2056,-4%2057,-3%2047,-3%2056))&bs=- https://records-ws.nbnatlas.org/
# ws/&movingaveragesize=1&gridsize=0.1&sitesbyspecies=1
## get the guid of the first species (which is the third column of the data frame, since the
## first two columns are longitude and latitude)
attr(ss,"guid")[1]
## End(Not run)
#@export
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