{"guid":"9e30959e-20c2-573d-b2a2-0ad93b513154","title":"What you map is not always what you get","subtitle":null,"slug":"sotm2022-18510-what-you-map-is-not-always-what-you-get","link":"https://2022.stateofthemap.org/sessions/NAF9EN/","description":"OSM has an unrestricted tagging model. Mappers can invent and use any tags.\nWhile this is part of OSM's success story, it has lead to a database where\nthe globe is described in ever greater detail. In this talk we want to\nexplore how users of OSM data handle a tagging model with so few constraints.\nRichard, the owner of cycle.travel, and Sarah, maintainer of Nominatim, team\nup to share their experiences of a decade of working with, and occasionally\nfighting against, OSM's ever evolving tagging schema.\n\nThe OSM tagging model has significantly evolved since the first streets of\nLondon were put into the database. Not only are more and more different\nobjects in the database, we also capture more of their properties and want\nto model ever finer nuances. This clashes with our goal to have one\ndatabase for the entire planet. The closer we look the more differences\nbetween different regions there are. And to capture those the tagging has to\nbecome even more complex.\n\nUsing the examples of the cycle tour planning site cycle.travel and the\nsearch engine Nominatim, we explore the evolution of OSM tagging from\na data user's point of view. Looking at questions like\n\n* where do data users get their information about tagging\n* what kind of tagging can be practically used in software\n* how to handle local defaults and assumptions\n* how should OSM ideally document its tagging","original_language":"eng","persons":["Sarah Hoffmann","Richard Fairhurst"],"view_count":273,"promoted":false,"date":"2022-08-19T16:30:00.000+02:00","release_date":"2022-09-19T00:00:00.000+02:00","updated_at":"2026-03-30T15:30:07.262+02:00","tags":["sotm2022","18510","2022","Mapping","OSM","OpenStreetMap"],"length":3426,"duration":3426,"thumb_url":"https://static.media.ccc.de/media/events/sotm/2022/18510-9e30959e-20c2-573d-b2a2-0ad93b513154.jpg","poster_url":"https://static.media.ccc.de/media/events/sotm/2022/18510-9e30959e-20c2-573d-b2a2-0ad93b513154_preview.jpg","timeline_url":"https://static.media.ccc.de/media/events/sotm/2022/18510-9e30959e-20c2-573d-b2a2-0ad93b513154.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/events/sotm/2022/18510-9e30959e-20c2-573d-b2a2-0ad93b513154.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/sotm2022-18510-what-you-map-is-not-always-what-you-get","url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_title":"State of the Map 2022","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022","related":[],"recordings":[{"size":227,"length":3426,"mime_type":"video/webm","language":"eng","filename":"sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_webm-hd.webm","state":"new","folder":"webm-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2022-09-19T12:48:11.109+02:00","recording_url":"https://cdn.media.ccc.de/events/sotm/2022/webm-hd/sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_webm-hd.webm","url":"https://api.media.ccc.de/public/recordings/61831","event_url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022"},{"size":112,"length":3426,"mime_type":"video/webm","language":"eng","filename":"sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_webm-sd.webm","state":"new","folder":"webm-sd","high_quality":false,"width":720,"height":576,"updated_at":"2022-09-19T12:01:06.669+02:00","recording_url":"https://cdn.media.ccc.de/events/sotm/2022/webm-sd/sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_webm-sd.webm","url":"https://api.media.ccc.de/public/recordings/61820","event_url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022"},{"size":75,"length":3426,"mime_type":"video/mp4","language":"eng","filename":"sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_sd.mp4","state":"new","folder":"h264-sd","high_quality":false,"width":720,"height":576,"updated_at":"2022-09-19T11:26:05.332+02:00","recording_url":"https://cdn.media.ccc.de/events/sotm/2022/h264-sd/sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_sd.mp4","url":"https://api.media.ccc.de/public/recordings/61811","event_url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022"},{"size":52,"length":3426,"mime_type":"audio/mpeg","language":"eng","filename":"sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_mp3.mp3","state":"new","folder":"mp3","high_quality":false,"width":0,"height":0,"updated_at":"2022-09-19T11:23:04.300+02:00","recording_url":"https://cdn.media.ccc.de/events/sotm/2022/mp3/sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_mp3.mp3","url":"https://api.media.ccc.de/public/recordings/61810","event_url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022"},{"size":147,"length":3426,"mime_type":"video/mp4","language":"eng","filename":"sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_hd.mp4","state":"new","folder":"h264-hd","high_quality":true,"width":1920,"height":1080,"updated_at":"2022-09-19T11:03:50.736+02:00","recording_url":"https://cdn.media.ccc.de/events/sotm/2022/h264-hd/sotm2022-18510-eng-What_you_map_is_not_always_what_you_get_hd.mp4","url":"https://api.media.ccc.de/public/recordings/61798","event_url":"https://api.media.ccc.de/public/events/9e30959e-20c2-573d-b2a2-0ad93b513154","conference_url":"https://api.media.ccc.de/public/conferences/sotm2022"}]}