Module map_model::make::initial::geometry [−][src]
Expand description
OSM describes roads as center-lines that intersect. Turn these into road and intersection polygons roughly by
- treating the road as a PolyLine with a width, so that it has a left and right edge
- finding the places where the edges of different roads intersect
- “Trimming back” the center lines to avoid the overlap
- Producing a polygon for the intersection itsef
Structs
| Piece |
Constants
| DEGENERATE_INTERSECTION_HALF_LENGTH |
Functions
| close_off_polygon | |
| deadend | |
| generalized_trim_back | |
| intersection_polygon | Also returns a list of labeled polygons for debugging. |
| on_off_ramp | |
| pretrimmed_geometry |