Create and manipulate a window of analysis for landscape descriptors used in AURELHY
Description
An AURELHY window of analysis ('auremask' object) specifies the regions relative to the point that define the various variables describing the landscape.
Usage
1 2 3 4 5 6 7 
Arguments
type 
the type of window, either 
dist 
A vector of distances (in km) to consider in the window for the

angles 
A vector of angles in radians to use to construct a

n 
The number of grid points in latitude and longitude to use for a

keep.origin 
Is the origin where the window is centered considered as one point of the grid, or not (by default, not, as in the original implementation of the AURELHY method) 
x 
An 'auremask' object 
geomat 
A reference grid, as a 'geomat' object against which the window of analysis is tested (print or plot the number of points that are located in each sector of the window) 
y 
Same as 
... 
further arguments passed to the function 
Details
auremask()
creates a new window of analysis. The object has print()
and
plot()
methods.
Value
An 'auremask' object with all information required to mask a 'geotm' object (terrain model) for creating landscape variables required by the AURELHY method.
Author(s)
Philippe Grosjean <phgrosjean@sciviews.org>
See Also
polar.coords
, geomat
Examples
1 2 3 4 5 6 7 8 