Fixing Up Motorways

OpenStreetMap is not only built by a global community of volunteers, it’s also maintained by those volunteers. But how does a potential maintainer find bits of the map which are broken? As an experiment, we’ve been running a process to find duplicate nodes on motorways around the world. These duplicate nodes mean that, although the motorway looks correct on the map, the two ways making up the motorway aren’t connected and it isn’t possible to route across them. The results of the experiment can be found at Harry’s FunMap page and below:

We’ve been updating the data regularly, usually daily, and collecting the results on the OpenStreetMap wiki page for the “250 Cities” project (an umbrella project for this experiment and various other cool things). What does the data tell us?

Duplicate motorway nodes against time.

Looks like there’ll be none left next weekend! Awesome work everyone!

September 3rd, 2009 - Posted by Matt Amos | 1 Comments

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  1. CloudMade Community » Fixing Up Other Roads said,

    on September 23rd, 2009 at 6:12 pm

    [...] the beginning of the month we started running a map to help people find the duplicate nodes on motorways which needed fixing. Initially there were quite a few in North America, but this has dropped [...]

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