[Talk-us] New version of US redaction map

Paul Norman penorman at mac.com
Tue Aug 14 04:11:14 BST 2012

It’s all CC BY-SA right now so you’d be okay now, but I think it’d be a problem in the future under both CC BY-SA and ODbL if you were mix the data in this way.


From: Martijn van Exel [mailto:m at rtijn.org] 
Sent: Monday, August 13, 2012 7:09 PM
To: Mike N
Cc: talk-us at openstreetmap.org
Subject: Re: [Talk-us] New version of US redaction map


On Mon, Aug 13, 2012 at 12:27 PM, Mike N <niceman at att.net> wrote:

On 8/13/2012 12:48 PM, Martijn van Exel wrote:

The main new thing is that it now shows deleted ways as well


 Very nice - this map and Toby's are very useful.     I see that the deleted ways are purple.

  One thing I have noticed is that it would be nice to detect a new roadway having been added under the old deleted roadway, and automatically remove the notification.


Interesting idea. My US database is currently catching up with reality, so I can't really try until that has completed, but I do have an idea how to make that work. Without relying on human tagging like in the Inspektor. What I would do is select all (current) ways that overlap the bounding box of the deleted way and that are created after 7/15, then calculate the hausdorff distance between the deleted way's geometry and the results of that query. If we get a close match, it is *very likely* that the way has already been remapped. Identical highway= tags may further corroborate this. What I am not so sure about is using the non-compliant geometry and tags this way, from a legal perspective. Anyone who can offer any ideas on that?




martijn van exel

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