check_polygon_contiguity | R Documentation |
Cast shp
to component polygons, build the adjacency, and check the contiguity.
Avoids issues where a precinct is actually a multipolygon
check_polygon_contiguity(shp, group, epsg = 3857)
shp |
An sf data frame |
group |
unquoted name of group identifier in shp. Typically, this is district assignment. If you're looking for dis-contiguous precincts, this should be a row number. |
epsg |
numeric EPSG code to planarize to. Default is 3857. |
tibble with a column for each of inputted group, created group number, and the identified connected component number
data(checkerboard)
check_polygon_contiguity(checkerboard, i)
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