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I am wondering if it is possible to create an interrupted Mollweide map in R.

This question is similar to Discontinuous or Interrupted map projections? which does not really have a satisfactory answer for my purposes.

I know you can use the Interrupted Goode Homolosine and other interrupted projections are available via alternate open-source tools such as GMT. However, I do not know how to use GMT and would prefer to avoid learning another software tool just for this purpose. I've also seen that the M_Map toolbox in Matlab has support for the interrupted Mollweide, but I do not have access to Matlab.

Is this possible in R or alternatively in ArcGIS?

An example of what I'm looking for:

enter image description here

Community
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Cotton.Rockwood
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1 Answers1

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R projects sp objects using proj4 strings. After some googleing, I got the impression that interrupted projections are not easily accomplished via proj4 arguments. Sounds like the mapproj package doesn't support interrupted projections either. I bet there is a solution, but probably not an easy one (e.g. check out this R-sig-Geo answer: https://stat.ethz.ch/pipermail/r-sig-geo/2007-April/001980.html)

Paul Regular
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  • Actually, the Goode Homolosine projection can be achieved via CRS +proj=igh, and the resulting shape cropped by the CounterDomain.geojson available here. – Rodrigo Aug 03 '22 at 02:14