borgIndices: Calculate shape indices listed in Borg 1998

Description Usage Arguments Details Value Author(s) References

View source: R/borgIndices.R

Description

Calculate shape indices listed in Borg 1998

Usage

1
borgIndices(Ar, Ur, De, Du)

Arguments

Ar

area of the entities

Ur

Perimeter of the cloud entities

De

Diameter of the inner circle

Du

Diameter of the outer circle

Details

This function is mainly used as internal function of geometryVariables

Value

A RasterStack

Author(s)

Hanna Meyer

References

Borg, E. & Fichtelmann, B. (1998): Vergleichende Analyse von Formindizes zur Charaktersierung von Landschaftsobjekten unter <c3><b6>kologischen Aspekten. Zeitschrift f<c3><bc>r Photogrammetrie und Vermessung, 66, 108-112. @examples msg_example <- raster(system.file("extdata/msg", "201007121650_mt09s_ct01dk009_m1hct_1000_rg01de_003000.rst", package="Rainfall")) # set non clouded areas to NA: msg_example=reclassify(msg_example, cbind(-99,NA)) #calculate geometry Variables geometry <- geometryVariables(msg_example,var=c("Ar","Ur","Re","Ru")) borg<-borgIndices(geometry$Ar,geometry$Ur,geometry$Re*2, geometry$Ru*2) plot(borg)


environmentalinformatics-marburg/Rainfall documentation built on May 13, 2017, 6:09 p.m.