[Talk-ca] New MapRoulette challenge to address highway class flip-flops

[Martijn van Exel]

Just as an addendum, you may find false positives like this one https://maproulette.org/mr3/challenge/3588/task/11055949 <https://maproulette.org/mr3/challenge/3588/task/11055949> where a service road connects to residential roads in a perfectly valid way. You should mark these as ’not an issue’ in MapRoulette.

Martijn

> On Feb 4, 2019, at 9:36 AM, Martijn van Exel <m at rtijn.org> wrote:
> 
> Hi all, 
> 
> Per Matthew Darwin’s request on Twitter, my team prepared a MapRoulette challenge for ‘highway class flip-flops’. What does this mean? Consecutive ways that have a suspicious change from one highway= value to another and then back to the former. This happens sometimes when mappers change the highway= value for some way but miss a bridge somewhere. An example is https://www.openstreetmap.org/way/53514358#map=19/51.23309/-116.65373 <https://www.openstreetmap.org/way/53514358#map=19/51.23309/-116.65373> where the bridge is marked as residential but the two adjoining ways are marked as unclassified.
> 
> You can find the challenge at https://maproulette.org/mr3/challenge/3588 <https://maproulette.org/mr3/challenge/3588> and your feedback is very welcome.There are ~300 tasks.
> 
> If you have other ideas for challenges to clean up / review existing data let me know and we can discuss.
> 
> Martijn
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