[Talk-us] [Imports] Uploads to City of Salisbury, MD

Marc Zoss marczoss at gmail.com
Thu Mar 22 13:28:11 GMT 2012

Nick and Josh

thanks for the clarification on your upload strategy. With previous large uploads I have experience the same behaviour resulting in massive dupes. So I guess it is not a conversion issue.

If you want me to commit the remove duplicates changeset, I can do so. But you will have to go through the data subsequently and check if the issues are resolved and no new ones emerged.


On 22.03.2012, at 14:12, Nick Chamberlain wrote:

> Josh and Marc,
> Thank you!  I apologize that I'm unable to speak the OSM language as
> well as everyone, I'm working on it :)  I posted on the Salisbury,
> Maryland Import page that Josh created to give more detail about my
> uploads.
> I didn't really think that I created so many duplicates, because I did a
> lot of things in JOSM before I actually chose to upload.  One thing I
> know for sure is that I didn't I upload until I was actually able to - I
> was getting a proxy error and the uploads were timing out when I
> attempted to upload the entire batch.  I assumed that these attempts
> were unsuccessful, which I might be wrong about and might have resulted
> in duplication.
> I assumed that my successful attempts started, maybe @ 10901673, when I
> realized I needed to break the original shapefile up tabularly into
> percentiles and upload 10 segments of the building footprint dataset,
> one after the other.  These were all definitely successful, and were
> only done once per percentile.
> Josh, where are you finding the list of changesets in the format you
> posted?  I can only figure out how to list them in my editor profile
> with my comments.
> If you believe that the method you mention that removes the 71,000 nodes
> is the best approach, please feel free to do so.  I will also gladly
> manually fix the inner ring tagging issue as the data gets fixed.
> Please let me know what I can do to help.  I am also willing to share
> the .osm files and/or shapefiles if that will help.  Thanks.
> - Nick
> -----Original Message-----
> From: joshthephysicist at gmail.com [mailto:joshthephysicist at gmail.com] On
> Behalf Of Josh Doe
> Sent: Thursday, March 22, 2012 8:51 AM
> To: Marc Zoss
> Cc: imports at openstreetmap.org; talk-us at openstreetmap.org; Nick
> Chamberlain
> Subject: Re: [Imports] [Talk-us] Uploads to City of Salisbury, MD
> On Thu, Mar 22, 2012 at 8:04 AM, Marc Zoss <marczoss at gmail.com> wrote:
>> I briefly downloaded all sby:bldgtype-tagged ways and relation of
> Maryland through the overpass-api. Then removed the ones having only a
> sby:bldgtype tag, run the validator and deleted the duplicated nodes and
> ways.
>> This would result in a changeset to remove the roughly 71'000
> duplicates nodes and ways.
>> If the area was edited since the import and reverting gets tricky,
> this might be the option to go, at least the result looks ok at the
> first glance.
>> Please also note that the conversion step seems to add a building=yes
> tag on on inner ring of building polygons () which is certainly bad
> tagging, despite the correct rendering (52 occurrences, so could be
> fixed manually).
> Thanks for doing that, as that was the next step I was going to try. I
> posted some regarding the changesets here:
> http://wiki.openstreetmap.org/wiki/User_talk:Nick_SPW#Salisbury.2C_Maryl
> and_import
> I think perhaps we should revert a subset of the changesets, such as the
> dangling nodes, and then use your method to handle the rest.
> -Josh

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