[R-sig-Geo] Compile sf in windows with liblwgeom

[Barry Rowlingson]

On Sat, Sep 16, 2017 at 3:45 PM, Edzer Pebesma <
edzer.pebesma at uni-muenster.de> wrote:

>
>
> On 16/09/17 15:20, Eduardo Diez wrote:
> > Dear list,
> > I have a MULTIPOLYGON geometry set where the rings are in the wrong
> > direction and would like to correct that with *st_make_valid*. As I'm in
> > Windows and use the binary version of the *sf* package it gives me the
> > error:
> >
> >> sp2 = st_make_valid(sp1)
> > Error in CPL_make_valid(x) :
> >   st_make_valid requires compilation against liblwgeom
> >
> > Is there a series of steps I can follow for compiling *sf* in Windows
> > linked to liblwgeom?
>
> No, and I also don't think that st_make_valid does this.
>
>
st_make_valid certainly did something:

https://gis.stackexchange.com/questions/254836/sf-lines-to-polygons-with-holes

I've just added an edit to my answer there with the sp-and-back round trip,
which seems to work, but its not exactly the most satisfying solution.

What's the problem with liblwgeom on Windows?

Barry

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