Make your first edit to OpenStreetMap

Others have gotten into how OSM fights vandalism, but I can tell you a little about what it is like to consume the data. About a decade ago I was in the public sector and we wanted to switch from google maps to OSM in our route calculation tool for the Danish travel-to-work tax deduction (translated). Initially we didn't change how the app worked, so we paid some organisation for an api access which worked similar to how a google maps api work. After a year or so we eventually rebuild the engine to keep a local copy of OSM where we had our GIS team do incremental and reviewed updates.

This was not because of vandalism, but because of how hard it was to update OSM when you don't do it often and might not look trustworthy. In Danish cities we have a complicated relationship with cars, we don't want them, but we do want the people they bring. One of the obstacles we create is having a lot of one way streets, and when OSM gets an error on those... well... suddenly there is a lot of addresses you simply can't reach. I once updated one of these errors with a photo from the internet, and it was rejected after a few miniutes because I had used an image from the internet which is (was?) against the TOS. Unfortunately the company we bought the API from was not doing any form of validation, so we had a week where our 5000 employess couldn't registerer driving to the most commonly used adress in the neighbouring city. I posted all sorts of documentation proving my official function, and had a discussion with the admins and even though they agreed I was right they refused to let me correct the mistake without real evidence. So eventually I drove my bicycle the 50km to the location, took some pictures and a couple with silly hats and submitted them and got my correction.

Once we had a local copy of the danish map we had no issues. I assume you would do this for any app relying on working routing data.

StreetComplete also asks about opening hours, but you need to have a POI added first (AFAIR StreetComplete allows adding POIs also)

See https://wiki.openstreetmap.org/wiki/Lake_Ontario for OpenStreetMap documentation page on that topic.

> The name of the lake became politically contentious in August 2026, especially on maps. As OSM is not a consumer-facing product per se, the OpenStreetMap Foundation's longstanding policy regarding geopolitical disputes is to prioritize the on the ground rule by default but also record information about notable alternative claims, so that data consumers such as renderers and geocoders can choose what to present to end users.

> As of September 2026, the Lake Ontario relation has tags indicating its many names, most notably:

(linked page has nicer table)

> name Common name in the local language Lake Ontario English is the most commonly spoken language in both the US and Canada.

> name:en Common name in English globally Lake Ontario This name remains overwhelmingly popular both in the U.S. and abroad and so far continues to be used by most news and print media.

> name:fr Common name in French globally Lac Ontario Traditional name (in the other official language of Canada).

> official_name:en-US English name preferred by U.S. federal government agencies Lake America Official U.S. federal government position per GNIS and GNS, as ordered in Executive Order 14422. The order is only binding on the U.S. federal government, but the name is very unpopular according to opinion polling, particularly in local areas bordering the lake, and so far rarely used in news or print media.

Automated building tracing is okay sometimes, but actively harmful other times. I know that at least in my region, Rapid footprints are all meters offset from the real location, because when they were building their dataset they weren't checking the satellite imagery offset.

In general it's probably better to see if you can find an official map, and check if its license terms are compatible[1] with OSM.

[1] https://blog.openstreetmap.org/2017/03/17/use-of-cc-by-data/

I'm conflicted about OSM. Historically maps have essentially had a military use. Volunteering to give otherwise unattainable level of detail about a potential future war zone, is not right. Some details should be kept away from maps. That's what I read in TAZ by Hakim Bey