Get Local and National Cycle Networks (lcn/ncn) from OSM data

Source: R/oi_cycle_routes.R

This function parses OSM data at the ways (linestrings), and relations (colection of geometrical features) level to obtain local and national cycle network (lcn/ncn) routes.

oi_cycle_routes(osm_ways, osm_relations, ..., remove=FALSE)

Arguments

osm_ways

  • A sf object containing OpenStreetMap infrastructure data on ways (linestrings), obtained using the osmextract R package.

osm_relations

  • A sf object containing OpenStreetMap infrastructure data on relations (collection of features), obtained using the osmextract R package.

...

Through (Named) argument return_cols, one can specify columns returned in the joined sf object containing ways & relation cycle routes.

return_cols should contain all columns to be returned in the combined ways & relations sf object. If no return_cols is supplied, the sf will be returned with the following default values: "osm_id", "highway", "name", "lcn", "ncn", "lcn_ref", "ncn_ref", "openinfra_cycle_routes", "geometry".

Note: columns to be returned MUST be present in both osm_ways and osm_relations to perform rbind. For more information see ?rbind()

remove

  • A boolean value, FALSE by default. If TRUE, removes features from the combined sf object if values of openinfra_cycle_routes are NA. (not part of a cycle route)

Value

a single sf object is returned containing both local and national cycle network routes from the ways and relations layer. Information on cycle routes assessed can be found in the openinfra_cycle_routes column.

Details

Note that the routes obtained through this function are for bicycle routes only. That is, features from relations must contain the route="bicycle" tag, as opposed to say, route="mtb", a tag for mountain bike trails. For more information see routes.

Note: the osm_ways & osm_relations must contain the following tags: "lcn", "lcn_ref", "ncn", "ncn_ref", "type", "route", "network", "cycle_network"

Examples

 osm_ways = example_data
 osm_relations = example_data_rels
 # NB: Not specifying `return_cols` here - default will be used instead. 
 output = oi_cycle_routes(osm_ways, osm_relations, remove=TRUE) 
#> No `return_cols` argument supplied, using default values:
#>  
#> "osm_id", "highway", "name", "lcn", "ncn", "lcn_ref","ncn_ref", "openinfra_cycle_routes", "geometry"
#> 
#> For more information see `?openinfra::oi_cycle_routes()`
#> osm relations: Wed Dec 14 15:03:14 2022
#> osm ways: Wed Dec 14 15:03:14 2022
#> rbinding: Wed Dec 14 15:03:14 2022
#> Removing NAs: Wed Dec 14 15:03:14 2022
#> Complete Wed Dec 14 15:03:14 2022
 plot(output)