alternativesenv: Determine where an incorrect point record should be placed by...
In biogeo: Point Data Quality Assessment and Coordinate Conversion

Description Usage Arguments Details Value Author(s) See Also Examples

View alternative points in an environmental space

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alternativesenv(dat, g1, group1 = "Species", ev, vars, 
world, xname = "", yname = "", rst, locality = "", 
ext = c(-180, 180, -60, 90))

`dat`	a dataframe containing fields with the following names: ID, x, y, Species, x_original, y_original, Correction, Modified, Exclude and the values of selected environmental variables
`g1`	the name of the species to select
`group1`	this is usually the column of species names
`ev`	a raster stack of environmental variables
`vars`	a character vector of two environmental variable names that will be used to define the environmental space. Values of these variables must be present in dat.
`world`	a shapefile of the world, where the column containing the country names must be "NAMES"; see data(wrld_simpl)
`xname`	x-axis label for the environmental space
`yname`	y-axis label for the environmental space
`rst`	a raster
`locality`	the name of the column of dat containing locality descriptions
`ext`	The extent, which can be specified as c(xmin, xmax, ymin, ymax) default extent c(-180, 180, -90, 90). Alternatively if ext="p" then the extent will be calculated from the coordinates of the points in the dataset.

This is an interactive plot of geographical and environmental space. Alternative positions for records selected in the geographical space are plotted in geographical space and environmental space.

An interactive plot is produced and the x- and y-coordinates are updated according to the selection of an alternative point by the user. The original values of the x- and y-coordinates will be written into the fields x_original and y_original. The date and time that the record was modified will be written into the field called Modified. The type of correction will be recorded as a number in the field called Corrected.

Mark Robertson and Vernon Visser

alternatives, alternatives2, geo2envid, geo2envpca

## Not run: 
fd<-system.file(package="biogeo")
foldenv<-file.path(fd,"inst","extdata", fsep = .Platform$file.sep)
ev<-env2stack(foldenv, vars = "", fext="bil")
dem<-raster(dem,xmn=-180, xmx=180, ymn=-60, ymx=90)
plotsetup(6,6)
g1="Species U"
vars=c("bio1","bio12")
d5<-alternativesenv(edat,g1,group1="Species",ev,vars,world,
xname="Annual Mean Temperature",yname="Annual Precipitation",
dem,locality="LocalityName",ext="p")
## End(Not run)