 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Description: Generates raster maps of slope, aspect, curvatures and partial derivatives from an elevation raster map. Aspect is calculated counterclockwise from east. </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Keywords: raster, terrain, aspect, slope, curvature, parallel </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> Parameters:</span>
<span class="r-out co"><span class="r-pr">#&gt;</span>   name: elevation, 