A review of the existing data in 5 most populated cities of France was detailed in our previous diary. Through this diary, we will be introducing you all to a handy tool for mapping turn restrictions.
Adding turn restrictions using OSM Navigation Map
OSM navigation map is an open tool that was built to review and add missing data for turn restrictions. It relies on Mapillary as a source to identify the turn restrictions in the detected traffic signages from the street level images captured by the volunteers.
The data team in Mapbox has used this tool for reviewing the existing restrictions and as well adding the missing ones for US cities, 5 cities each in Canada and Germany. The tool assists in reviewing the restrictions easily and quickly.
Detected signage of
only_right_turn restriction in Mapillary
Detected signage of
no_right_turn restriction in Mapillary
Verifying turn restriction with images from Mapillary in OSM Navigation Map
Reviewing turn restriction in OSM Navigation Map
Community participation has already ensured that around 436 turn restrictions across 5 cities (Paris, Marseille, Lyon, Toulouse, and Nice) of France :clap: :tada: . Along with the local knowledge, this tool would be a great companion to improve data in OpenStreetMap for navigation.
If it’s your first time mapping turn restrictions, read the guide on mapping turn restrictions using Mapillary to understand different scenarios and special cases. Help us by updating the special cases list for France that would help all community mappers as well our mapping team to be aware of these cases while reviewing turn restrictions.
We would love to collaborate with the community on improving the data in OpenStreetMap by collectively getting feedback on our tools as well as workflow.
As most of us in the team are English speakers, it is difficult for us to translate the guide into French. It would be great if the community members can help us in translating the OSM Navigation Map guide to French and host it on OpenStreetMap wiki or anywhere that would be valuable for local mappers to refer.