Removes interstitial (degree-2) nodes that merely shape the geometry of a
street, merging each maximal chain of such nodes into a single edge whose
geometry follows the original points and whose length is the sum of the
merged segments. Only true endpoints and intersections are kept as nodes.
Arguments
- g
An unsimplified osm_graph.
Value
A simplified osm_graph (with meta$simplified = TRUE).
Details
The topology walk is performed by the Rust core; geometry is rebuilt with
sf. Downloaded graphs are unsimplified by default; this is the standard
cleanup step before analysis.
Examples
g <- example_osm_graph()
ox_simplify(g) # already simplified: returned unchanged
#> ℹ Graph is already simplified; returning unchanged.
#>
#> ── osm_graph ───────────────────────────────────────────────────────────────────
#> 16 nodes, 48 edges
#> Network type: "drive"
#> Simplified: TRUE
#> CRS: "EPSG:3857"