You've surveyed, you've mapped and tagged, and you're nearly ready to use the data you and other mappers have collected. Just before you do, it's worth doing some checks to see if you or anyone else has made any mistakes. There are many online tools you can use to inspect the data and identify possible problems, provided by the project itself and some third parties.
In this chapter, we'll look at some of the following tools you can use to check OpenStreetMap data in a particular area, and what problems they can and can't tell you about:
The data inspection tools on openstreetmap.org
The NoName map
ITOWorld OSM Mapper
Geofabrik's OSM Inspector
Some of these tools identify specific problems, while others allow you to see when changes to the data were made and by whom. In either case, all these tools can do is offer guidance, not black-and-white answers, and you always need to use judgment when checking data.
It's important to remember that there...