create_distance_cs

Creates a conductance matrix based on the distance between neighbouring cells. Distance corrected for if neighbours value is greater than 4.

Calculates cost surfaces based on slope to be used when modelling pathways and movement potential within a landscape (Lewis, 2021) <doi:10.1007/s10816-021-09522-w>.

Joseph Lewis

leastcostpath

Modelling Pathways and Movement Potential Within a Landscape

create_distance_cs function

<dl><dt>x</dt>
<dd><code>SpatRaster</code>. Digital Elevation Model (DEM)</dd>
<dt>neighbours</dt>
<dd><code>numeric</code> value. Number of directions used in the conductance matrix calculation. Expected numeric values are 4, 8, 16, 32, 48, or matrix object. 16 (default)</dd>
<dt>max_slope</dt>
<dd><code>numeric</code> value. Maximum percentage slope that is traversable. Slope values that are greater than the specified max_slope are given a conductivity value of 0. If cost_function argument is 'campbell 2019' then max_slope is fixed at 30 degrees slope to reflect the maximum slope that the cost function is parametised to. NULL (default)</dd>
<dt>exaggeration</dt>
<dd><code>logical</code>. if TRUE, positive slope values (up-hill movement) multiplied by 1.99 and negative slope values (down-hill movement) multiplied by 2.31</dd></dl>

Arguments

Author

Creates a distance-based conductance matrix — create_distance_cs

<dl>

<dt>x</dt>
<dd><code>SpatRaster</code>. Digital Elevation Model (DEM)</dd>


<dt>neighbours</dt>
<dd><code>numeric</code> value. Number of directions used in the conductance matrix calculation. Expected numeric values are 4, 8, 16, 32, 48, or matrix object. 16 (default)</dd>


<dt>max_slope</dt>
<dd><code>numeric</code> value. Maximum percentage slope that is traversable. Slope values that are greater than the specified max_slope are given a conductivity value of 0. If cost_function argument is 'campbell 2019' then max_slope is fixed at 30 degrees slope to reflect the maximum slope that the cost function is parametised to. NULL (default)</dd>


<dt>exaggeration</dt>
<dd><code>logical</code>. if TRUE, positive slope values (up-hill movement) multiplied by 1.99 and negative slope values (down-hill movement) multiplied by 2.31</dd>

</dl>

create_distance_cs: Creates a distance-based conductance matrix

Description

Usage

Value

Arguments

Author

Examples