Relation Check

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Introduction

Relation check looks for errors in the relations of an .osm file. It checks the following relations:

Types checked

• restriction
• multipolygon (with "no-role ways")
• route (with forward/backward/other distinction)
• boundary (with enclaves/exclaves)

Output contains

• Simple maps of relations with problems
• Link to relations in OSM (history)
• Links to "open ends" (JOSM)
• Link to the Relation Analyzer
• Tags
• Errors

Modes

• Mode can be given so only certain types will be checked
• Mode picture can be switched on and off

Other

• optionally accepts a simple *.poly file (like osmosis) to draw file border into maps. Simple means that only the first polygon in the file is considered for evaluation.

Hints

• Expect false positives at the relations that touch the border of the checked osm file! To limit the number of false positives a threshold of 1 km is implemented. If an open end of a relation is closer than 1 km to a border node then the relation will not be reported. Nevertheless be careful when the green border appears in the map...
• I have experienced differences regarding relation members in OSM files and OSM history...
• It is a good idea to just browse through the pictures in a folder on your disk.

Check results

no longer available

Code

[1]

Todo

• draw only cities (no towns) when area reaches certain limit
• link to OSM Route Manager

Nice to have

• gpx file per route
• route check support for roundabouts
• link to restriction analyzer?
• (multi polygons out of *.poly files)
• Relation Analyzer functionality (analyze and show all relations found in file even if they don't have an error?)
• For routes calculate distances

See also

• Relation Analyzer at osm.fr Down per August 2021
• OSM Relation Analyser Similar tool wiki
• OSM Relation Analyzer Link to this similar tool that is up and running as of late 2023.