Generate a buffer polygon around a line string (union of point buffers).
Returns a flat Float64Array of polygon vertices [lng0, lat0, ...].
Note: this is a simplified implementation that produces a convex hull of
all circle vertices around each line point. For production use with
concave results, consider geo's BooleanOps union.
Generate a buffer polygon around a line string (union of point buffers).
Returns a flat
Float64Arrayof polygon vertices[lng0, lat0, ...]. Note: this is a simplified implementation that produces a convex hull of all circle vertices around each line point. For production use with concave results, considergeo'sBooleanOpsunion.