abstreet/docs/TODO_quality.md

TODO - Map quality

Geometry

• bad polyline shifting remains

  • from the remaining cases, looks like we need to totally remove some tight points and retry
  • make polygons use the corrections too?
  • bad polyline shifting causes jagged lane endings in generalized_trim_back

• handle small roads again somehow?

  • reduce degenerate min trim. the disabled fix doesn't look great.
  • I40, I25, I0 cut corners when merged. disabled fix works, but breaks other things.
  • try it bigger
  • deal with loop roads?
  • model U-turns

• degenerate-2's should only have one crosswalk

  • then make them thinner

• ped paths through sidewalk corners are totally broken

  • calculate the better paths first, then make the corner geometry from that?

• car turns often clip sidewalk corners now

• figure out what to do about yellow center lines

  • intersections on one-ways look weird
  • yellow and white lines intersect cars and turn icons and such
  • who should own drawing them?

More data

• lanes: https://data-seattlecitygis.opendata.arcgis.com/datasets/49d417979fec452981a068ca078e7070_3
  • not filled out for most streets
• traffic circles: https://data-seattlecitygis.opendata.arcgis.com/datasets/717b10434d4945658355eba78b66971a_6
• https://data-seattlecitygis.opendata.arcgis.com/datasets/sidewalks
  • disagrees with OSM road centers sometimes
• https://data-seattlecitygis.opendata.arcgis.com/datasets/curb-ramps
• high quality thick roads: https://seattlecitygis.maps.arcgis.com/apps/webappviewer/index.html?id=86cb6824307c4d63b8e180ebcff58ce2
• OSM has footways
  • but theyre not marked everywhere
  • and theyre hard to associate with roads (sometimes need to infer a planter strip)
• draw benches, bike racks
• render trees
• look for current stop sign priorities
  • https://gis-kingcounty.opendata.arcgis.com/datasets/traffic-signs--sign-point/
• population
  • http://seattlecitygis.maps.arcgis.com/apps/MapSeries/index.html?appid=3eb44a4fdf9a4fff9e1c105cd5e7fe27
  • https://data-seattlecitygis.opendata.arcgis.com/datasets/residential-building-permits-issued-and-final has NET_UNITS

Low-priority geometry issues

• if building front path intersects another building, then scrap that building.

  • or wait, just require bldgs to be even closer to sidewalk first.
  • need to do polygon vs polygon check!
  • will need to speed it up with quadtree containing entire buildings. make sure these are easy to use.

• can we make OSM buildings with holes?

  • experiment with https://docs.rs/clipping/0.1.1/clipping/gh/struct.CPolygon.html and https://github.com/21re/rust-geo-booleanop

More problems to fix

• Disconnected map
  • Some lane-changing model needed to determine this
• Impossible turns (from a far bus lane to a crazy left)
• Buildings intersecting roads, probably because bad lane inference
  • when this happens, get rid of parking lanes first (one or both sides?)
  • iterative process... have to redo affected roads and intersections
  • we havent filtered buildings by proximity to sidewalk yet
    • if we dont filter at all, we pick up some houseboats! :) should draw water...

Release

• publish the map data
• stabilize the code except for sim