ing to GEOS 3.6.1, GDAL 2.2.4, PROJ 4.9.3</span></div><div class='input'><span class='fu'><a href='https://www.rdocumentation.org/packages/utils/topics/data'>data</a></span>(<span class='st'>"regions1"</span>)
<span class='fu'><a href='https://www.rdocumentation.org/packages/utils/topics/data'>data</a></span>(<span class='st'>"regions2"</span>)

<span class='no'>mc</span> <span class='kw'>=</span> <span class='fu'>mapcurves_calc</span>(<span class='kw'>x</span> <span class='kw'>=</span> <span class='no'>reg