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 one > 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)'
a[b,] # or st_join(a, b, left = FALSE) # no left join gives you inner join > > Thanks. > > THK > -- Edzer Pebesma Institute for Geoinformatics Heisenbergstrasse 2, 48151 Muenster, Germany Phone: +49 251 8333081
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