Integrate GeosNG into sf

[edzer]

See e.g. https://lin-ear-th-inking.blogspot.com/2020/05/jts-overlay-next-generation.html

I think this can only be considered progress, so suggest to merge with main.

[rsbivand]

Yes, does make sense; I didn't spot the *Prec versions when updating rgeos for which this is now too late with only six months to archiving.

[edzer]

@paleolimbot I see from the geos sources that ...Prec_r() functions were introduced in 3.9.1-1, so that needs updating of the #ifdefs

[paleolimbot]

I think it was probably introduced in GEOS 3.9 (which to my reading means that your ifdefs in this PR are OK)...I think that libgeos (in the R package sense) version 3.9.0 didn't exist which is why the version dependency is 3.9.1.

[paleolimbot]

Agreed that it's progress! There is an analog in s2 as well (you can do an overlay with explicit precision there using the various snap options).

[edzer]

There is an analog in s2 as well (you can do an overlay with explicit precision there using the various snap options).

Now that you mention this - worth a post in the docs, or on r-spatial.org! Thanks,