Download OSM road graph and preprocess it

This function uses osmdata to download a OSM street graph. The extent of the downloaded area is defined by the start and end coordinates of the desired path plus a buffer, that extends the bounding box in all directions. The graph is then preprocessed for routing purposes, which includes removing topologically unnecessary parts and calculating edge weights based on the selected weighting profile.

download_graph(start_pt, end_pt, weighting_profile = "bicycle", buffer = 0,
  quiet = TRUE)

Arguments

start_pt	Two numeric values (latitude, longitude) as start point coordinates.
end_pt	Two numeric values (latitude, longitude) as end point coordinates.
weighting_profile	Name of the used weighting profile. osmprob::weighting_profiles contains all available profiles.
buffer	Positive value that defines by how much (in percent) should the downloaded data extend the bounding box defined by start_pt and end_pt.
quiet	If FALSE, print progress information to screen.

Value

graphs list containing the original street graph, a minimized graph map linking the two to each other.

Examples

not_run({
  start_pt <- c (11.580, 48.140)
  end_pt <- c (11.585, 48.145)
  graph <- download_graph (start_pt = start_pt, end_pt = end_pt,
  weighting_profile = "bicycle", buffer = 0)
})