GRASS logo

NAME

r.northerness.easterness - Calculation of northerness, easterness and the interaction between northerness and slope

KEYWORDS

raster, terrain, aspect, slope, sun

SYNOPSIS

r.northerness.easterness
r.northerness.easterness --help
r.northerness.easterness elevation=name [--help] [--verbose] [--quiet] [--ui]

Flags:

--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

elevation=name [required]
Name of elevation raster map

Table of contents

DESCRIPTION

r.northerness.easterness calculates northerness, easterness and the interaction between northerness and slope (northerness*slope). The user must specify the input elevation raster map.

NOTES

As aspect is a circular land-surface parameter, in ecology a sine or cosine transformation is often used to obtain a continuous gradient, stressing the north-south or east-west gradient (northness or eastness).

The GRASS GIS default aspect angles (cartesian) are converted to compass angles.

Calculated raster maps are:

The color of these raster maps are set to grey.

EXAMPLE

  # align region to DEM and habitat vector
  g.region -a raster=DEM align=DEM

  # run r.northerness.easterness
  r.northerness.easterness elevation=DEM
 

REFERENCES

Olaya, V. 2009. Basic Land-Surface Parameters. In: Hengl, T. & Reuter, H.I. (eds.) 2009. Geomorphometry. Concepts, Software, Applications. Developments in Soil Science, Volume 33. Elsevier.

SEE ALSO

r.mapcalc, r.slope.aspect

AUTHOR

Helmut Kudrnovsky

SOURCE CODE

Available at: r.northerness.easterness source code (history)

Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730


Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

© 2003-2023 GRASS Development Team, GRASS GIS 8.2.2dev Reference Manual