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The function chull :

Computes the subset of points which lie on the convex hull of the set of points specified.

I can use it on latitudes and longitudes but the result won't be exact, because of the curvature of the Earth, how can I compute the equivalent gps_chull ?

Answers linked in the comments are not R answers. They give hints as to how we might design a R answer but are not it.

moodymudskipper
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  • Also see https://stackoverflow.com/questions/9601816/calculate-earth-convex-hull-polygon-area-given-latitude-and-longitude/9612324#9612324 – dww Dec 01 '18 at 00:17
  • These are great links @dww thank you, however these are not tagged as R questions, if somebody comes up with a handy R function they won't be able to post it there, so I wouldn't say it qualifies as a duplicate. – moodymudskipper Dec 01 '18 at 00:58
  • There is the function `st_convex_hull` in the `sf` package. Also take a look at the [concaveman](https://cran.r-project.org/web/packages/concaveman/) package. – markus Dec 30 '18 at 09:18

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