ignorance_map: Ignorance map

In interacquas/ignobioR: Managing biodiversity occurrence data considering uncertainty

Description

A list of species potentially occurring within a study site, in which a probability of occurrence is computed for every taxon

Usage

ignorance_map(
  data_flor,
  site,
  year_study = NULL,
  excl_areas = NULL,
  CRS.new = 3035,
  tau,
  cellsize,
  verbose = TRUE
)

Arguments

data_flor	dataframe having 5 columns, namely ‘Taxon’ (species identity), ‘Long’ (longitude coordinates), ‘Lat’ (latitude coordinates), ‘uncertainty’ (radius of uncertainty, in metres), and ‘year’ (year of the record)
site	a layer object of class ‘SpatialPolygonsDataFrame’ representing the study area, having CRS: +init=epsg:4326
year_study	the present-year in which you perform the analysis
excl_areas	a layer object of class ‘SpatialPolygonsDataFrame’ to delimit certainly unsuitable areas adjacent or within the study area, having CRS: +init=epsg:4326
CRS.new	the new Coordinate Reference System. Note: must be a projected CRS. Default = 3035.
tau	percentual value of taxa loss in 100 years time-span (see below for further details)
cellsize	the resolution of the ignorance map (in meters)
verbose	an optional logical value. If TRUE information on the evolution of the algorithm is printed. Default is TRUE (suggested for large dataset)

Value

A list with 4 objects:

• "MRFI" the Map of Relative Floristic Ignorance

• "RICH" the corresponding map computed without taking into account spatial and temporal uncertainties

• "uncertainties" the corresponding map computed without taking into account spatial and temporal uncertainties

• "Statistics" a table summarising the settings used to draft the Map of Florstic Ignorance

Examples

## Not run: 
data(floratus)
data(park)
data(unsuitablezone)

# Short example
set.seed(123)
mrfi <- ignorance_map(data_flor= floratus[sample(nrow(floratus), 2000), ],  site=park, tau= 80, cellsize= 2000)

# Extended example
mrfi <- ignorance_map(data_flor = floratus, excl_areas = unsuitablezone, site = park, tau = 20, cellsize = 2000)

## End(Not run)

interacquas/ignobioR documentation built on July 2, 2021, 3:13 a.m.