GRASS GIS manual: r.prominence

NAME

r.prominence - Calculates Llobera's prominence index

KEYWORDS

SYNOPSIS

r.prominence
r.prominence help
r.prominence [-algrq] input=name output=name radius=integer [--verbose] [--quiet]

Flags:

-a: Calculate absolute differences
-l: Local data normalisation
-g: Global data normalisation
-r: Use quadratic neighbourhood
-q: Disable on-screen progress display
--verbose: Verbose module output
--quiet: Quiet module output

Parameters:

input=name: FP raster map for which to calculate index
output=name: FP raster to store output
radius=integer: Radius of neighbourhood in map cells

DESCRIPTION

r.prominence calculates the average difference between a central cell and its neighbors. It approximated the terrain 'ruggedness' by looking at average differences in elevation within a given neighborhood The radius is specified in number of map rows/columns.

EXAMPLE

Spearfish region:

g.region rast=elevation.10m

# get region rows/columns
g.region -g

# calculate prominence (radius of 500 map rows)
r.prominence in=elevation.10m out=prominence radius=500

# visualize over shaded DEM
r.shaded.relief elevation.10m
d.mon x0
d.his i=elevation.10m.shade h=prominence

AUTHOR

Benjamin Ducke (benjamin.ducke - oxfordarch.co.uk)

Last changed: $Date$

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