Trim Away Small Pieces — geo

Keep only rows of from whose intersection with to covers more than a given share of the row's area.

geo_trim(from, to, thresh = 0.01, bool = FALSE, epsg = 3857)

Arguments

from: sf object to subset.
to: sf object used as the target geography.
thresh: Minimum retained overlap as a proportion of each row's area.
bool: Logical. If TRUE, return only the logical keep vector.
epsg: numeric EPSG code to planarize to. Default is 3857.

Value

subset of from, or a logical vector when bool = TRUE

Examples

if (FALSE) { # \dontrun{
# Needs Census Bureau API
data(towns)
block <- create_block_table('NY', 'Rockland')
geo_trim(block, towns, thresh = 0.05)
} # }

data(towns)
data(rockland)
sub <- geo_filter(rockland, towns)
rem <- geo_trim(sub, towns, thresh = 0.05)