count the number of points/vertices/nodes of sf objects
npts(x, by_feature = FALSE)
an sf/sfc object
count total number of vertices (FALSE) of for each feature (TRUE).
currently only works for *POINTS, *LINES and *POLYGONS (not GEOMETRYCOLLECTION).
npts(franconia) npts(franconia, by_feature = TRUE) npts(sf::st_geometry(franconia[1, ])) # first polygon npts(breweries) # is the same as nrow(breweries)
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