calculateIndependence: Calculates the independence value of a summit

In gisma/perfectPeak: Calculates the perfect peaks

Description

Calculates the independence Value (E) for a given set of coordinates, altitude, dominance and prominence values according to the formula as suggested by Rauch:

if d<100000: E = -((log2 (h / 8848) + log2 (d / 100000) + log2(p / h)) / 3) if d>100000: E = -((log2 (h / 8848) + log2(p / h)) / 3)

with: h = altitude in m d = dominance in m p = prominence in m

For a controverse discussion of the formula look at: http://www.alpenverein.de/dav-services/panorama-magazin/dominanz-prominenz-eigenstaendigkeit-eines-berges_aid_11186.html

Basically it is used for DEM analysis but can be used also for single calculations.

Usage

calculateIndependence(peaklist.tupel)

Arguments

peaklist

data.frame containing one row with all data

Value

calculateIndependence returns the E Value of the current peak

Author(s)

Chris Reudenbach

References

Marburg Open Courseware Advanced GIS: http://moc.environmentalinformatics-marburg.de/doku.php?id=courses:msc:advanced-gis:description

Rauch. C. (2012): Der perfekte Gipfel. Panorama, 2/2012, S. 112 http://www.alpenverein.de/dav-services/panorama-magazin/dominanz-prominenz-eigenstaendigkeit-eines-berges_aid_11186.html

Leonhard, W. (2012): Eigenständigkeit von Gipfeln.http://www.thehighrisepages.de/bergtouren/na_orogr.htm

Examples

  
#### Example to calculate the Independence Value needs the dominance and prominence values
      
calculateIndependence()

gisma/perfectPeak documentation built on May 17, 2019, 5:27 a.m.