tke|tt @end|ng |rom utex@@@edu
Tue May 7 22:18:08 CEST 2019
On Tue, May 7, 2019 at 1:39 PM Edzer Pebesma <edzer.pebesma using uni-muenster.de>
> On 5/7/19 8:29 PM, Tim Keitt wrote:
> > I keep finding things that are trivial in sql are not so in R, so perhaps
> > you can help me out.
> > What would be the way in the 'sf' package to retain only polygons from
> > coverage that intersect points in another coverage? I think that's a
> > semi-join.
> > Roughly: 'select a.* from polys a, points b where st_intersects(a.geom,
> > b.geom)'
> # or
> st_join(a, b, left = FALSE) # no left join gives you inner join
Hmm... tried this and for some reasons it was not giving me what I wanted.
I will investigate.
> > Thanks.
> > THK
> Edzer Pebesma
> Institute for Geoinformatics
> Heisenbergstrasse 2, 48151 Muenster, Germany
> Phone: +49 251 8333081
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Timothy H. Keitt
Professor of Integrative Biology and
Associate Chair for Undergraduate Education
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