[Talk-us] buggy buildings in Maryland

[Ben Discoe]

+1 to Elliot Plack's proposal to use Simplify to remove the redundant
nodes from the poor quality imported buildings.

In fact, I did this myself for another massive import: User "jumbanho"
imported buildings for the large city of Raleigh, NC back in January
2010.
There were lots of degenerate nodes, which I cleaned up in batches
using JOSM's simplify.  I did most of the cleanup in 2015.

-Ben
On Mon, Aug 20, 2018 at 5:30 AM Elliott Plack <elliott.plack at gmail.com> wrote:
>
> Here's a potential fix: use the SimplifyArea JOSM Plugin. https://wiki.openstreetmap.org/wiki/JOSM/Plugins/SimplifyArea
>
> The plugin is built for fixing over-noded and buggy imports.
>
> As a test, I downloaded the plugin and then downloaded some of Annapolis sailor's buildings.
>
> This building should only contain four nodes: https://www.openstreetmap.org/way/525751797
>
> This building should only contain eight nodes: https://www.openstreetmap.org/way/526209538
>
> The plugin successfully reduced the nodes for both buildings without affecting the shape, unlike the simplify way tool.
>
> I tested it on a larger swath of 500 buildings and it took less than a second to run.
>
> I haven't uploaded any of the changes yet, but I think this would be a good path forward.
>
> On Thu, Aug 16, 2018 at 8:02 PM Frederik Ramm <frederik at remote.org> wrote:
>>
>> Hi,
>>
>> On 08/16/2018 08:08 PM, Elliott Plack wrote:
>> > I'd say go ahead and remove the extraneous nodes
>>
>> This has now been done.
>>
>> > and also any buildings
>> > that are either version 0 or do not have any new tags (like names or
>> > addresses)
>>
>> It appears that of the 177,151 buildings still there, only 29,513 have
>> tags other than building=*. In most cases, these other tags are
>> addr:street and addr:housenumber.
>>
>> I'll let this rest for a bit to give others a chance to chime in.
>>
>> Bye
>> Frederik
>>
>> --
>> Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"
>>
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>
> --
> Elliott Plack
> http://elliottplack.me
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