BRouter suspect manager: find suspicious nodes in the road network

The suspect manager is a tool to help you find errors and inconsistencies in the road network.

This is experts only. Suspects are really just suspects, most are not issues, the false-positive-rate is high!

See suspect_scanning_readme.txt for technical details on the rule-set and the suspect life-cycle.

Please update suspect status after review! To make status updates, you are required o to some test routings in BRouter-Web (1 to mark as confirmed, 4 to mark as false-positive). To do that, use the link "Open in BRouter-Web". Inside BRouter-Web, click on the Pen-Button ("draw route"), then click on the map to set the second waypoint. You can do more test routings by moving one of the 2 waypoints. After marking as confirmed, go on and mark as either "fixed" (if you actually fixed the issue) or use "hide for.." to hide the suspect for some time (if e.g. it's a construction or you wrote a note or a changeset-comment).

Suspect scanning is done via random routings with a variant of the car-eco profile. In these random routings, the graph is traversed from a random seed-point within a 30km-radius disc around that see-point. Fo each 1-degree by 1-degree square, the number of seed-points is calculated such that the area is covered 6 times on average. Half of these random routings are done in forward-logic, the other half backward. However, also with this 6-fold coverage, not every suspect is detected in every scan, because some detections depend on the logical direction, the routing direction, or seed-points hitting special routing half-islands.

To use the "Open in JOSM (via remote control)" option JOSM must be listening for HTTP on port 8111.

Currently, suspects are scanned weekly. The BRouter data-refresh run starts saturday evening (with map snapshot time 9 PM) an finishes on sunday morning. After that, the suspect scan takes another 2 hours, so new suspsects ae available at some time sunday morning. You can work on "new" suspects that first showed up in the latest scan, or on "all" suspects. If you plan to start tracking suspects for a country or region with no previous suspect tracking done, it's best to start with new "new" suspects, as they have a lower false-positive rate and your chances are better to contact the mappers that created the bad changesets. Cleaning up "all" suspects for a big country is a bigger projects that needs many weeks.


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