find_down: Find all elements related to an ID

In gergness/osmar2: OpenStreetMap and R

Description

For a given ID these functions return all IDs of related elements.

Usage

find_down(object, ids)

find_up(object, ids)

Arguments

object	An osmar object
ids	A vector of IDs tagged whether they are node, way, or relation

Details

find_down finds all elements downwards the hierarchy:

node	->	node
way	->	way + node
relation	->	relation + way + node

find_up finds all elements upwards the hierarchy:

node	->	node + way + relation
way	->	way + relation
relation	->	relation

Value

A list with the three elements node_ids, way_ids, relation_ids

See Also

Other finding: find_nearest_node, find

Examples

  data("muc", package = "osmar2")
  o1 <- find(muc, way(tags(k == "highway" & v == "pedestrian")))

  find_down(muc, way(o1))
  find_up(muc, way(o1))

gergness/osmar2 documentation built on May 17, 2019, 2:10 a.m.