EOOarea: Extent of Occurance (EOO) Area

In rCAT: Conservation Assessment Tools

Description

Calculates the Extent of Occurance from a set of points (x,y)

Usage

EOOarea(thepoints)

Arguments

thepoints

dataframe of points i.e. c(x,y)

Details

calculates the EOO area of a set of popints'

Value

float_value area of EOO polygon

Note

area returned is in x,y units, but negative as polygon is constructed anticlockwise

Author(s)

Justin Moat. [e-mail]

References

Bachman, S., Moat, J., Hill, A.W., de Torre, J., Scott, B., 2011. Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. Zookeys 126, 117–26. doi:10.3897/zookeys.150.2109

Moat, J., Bachman, S., n.d. GeoCAT Geospatial Conservation Assessment Tool [WWW Document]. URL http://geocat.kew.org/

Joppa, L.N., Butchart, S.H.M., Hoffmann, M., Bachman, S.P., Akçakaya, H.R., Moat, J.F., Böhm, M., Holland, R.A., Newton, A., Polidoro, B., Hughes, A., 2016. Impact of alternative metrics on estimates of extent of occurrence for extinction risk assessment. Conserv. Biol. 30, 362–370. doi:10.1111/cobi.12591

See Also

EOORating for EOO Ratings

Examples

x <- runif (20,0,10)
y <- runif (20,0,10)
df <- data.frame(x,y) 
EOOarea (df)

rCAT documentation built on July 8, 2020, 6:22 p.m.