Visual detection of outliers.

Description

Draws plots of sites in geographical (latlong) and environmental (2-axis PCA) space.

Usage

1
outliers(longlat, layers)

Arguments

longlat

Matrix of longitude and latitude (two columns) of species occurrence records.

layers

Raster* object as defined by package raster. It can be any set of environmental layers thought to allow the identification of environmental outliers.

Details

Erroneous data sources or errors in transcriptions may introduce outliers that can be easily detected by looking at simple graphs of geographical or environmental space.

Value

No values are returned, two plots are drawn for visual inspection.