NoName
The NoName map layer highlights roads with no name=foo tag with a red casing at higher zoom levels, or as thin red lines at lower zoom levels. It is no longer available from the openstreetmap.org homepage, but is available at Cloudmade Maps by clicking "Change Style" in the top menu and selecting No-Names (zoom 11 or above.)
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Rendering updates
Update problems
The main NoName layer is hosted and maintained by CloudMade. It is rendered using Mapnik. For a long time it was updated every Thursday using the planet dump from the day before, however updates seem to be quite sporadic due to ongoing technical problems. See also forum question about updates
Examples
The NoName map layer allows quick identification of areas that have been traced from aerial images, but where road names are missing. This can be useful for planning events like the London Mapping Party Marathon. It should be noted that the map cannot show you errors, such as where the roads are missing (for example due to tree cover), or junctions that are completely wrong from a topological sense.
Garmin .img files
Cloudmade also provides noname .img files for use on Garmin GPS units. This is useful when surveying so you know which streets need to be named.
NoName tag
It should be possible to distinguish a road where the name is unknown and a road which has really no name. The tagging proposal shows no clear consensus yet about how to tag this. Currently, the NoName layer doesn't support any of the proposed 'noname' tags.
Other tools highlighting missing names
- OSM Inspector, with the 'Highways' view.
- Yet another validation tool for osm data
