[OSM-talk] finding overlapping buildings

[Pierre Béland]

I am not sure what is already included in JOSM validations, but with orthogonal and Duplicates, we cover most of the  newbies tracing buildings problems that we can automatically spot analyzing the data. 
Others would be about dimensions that exceed normal building size, this including big institutions, shopping centers etc.
- Maximum area size considered as building 
- Maximum length ( we dont want one cm x few km)
Newbies often badly interpret imagery which brings in coverage or accuracy problems. We cannot identify all problems with these test  but I think that the tests we covered so far should identify most of these problematic contributions, helping to concentrate on contributors with most of the problems.
John who specializes on Validation of Mapathon might see other aspects to look at.
 
Pierre 
 

    Le vendredi 24 novembre 2017 20:12:04 HNE, Mike Thompson <miketho16 at gmail.com> a écrit :  
 
 I have a fix for the speed issue, but need to test before posting. There is also bug with how the overlap is computed.  Do you want both tests in the same script? I could include "building ways with unclosed area", anything else?
On Fri, Nov 24, 2017 at 4:14 PM, Pierre Béland <pierzenh at yahoo.fr> wrote:

Ok
for the script, I simply commented the console print message and it does work.

Great if developpers could collaborate to improve this as a Building Validation plugin. It could include other features such as building ways with unclosed area

 
Pierre 
 

    Le vendredi 24 novembre 2017 18:03:48 HNE, Mike Thompson <miketho16 at gmail.com> a écrit :  
 
 On Fri, Nov 24, 2017 at 3:43 PM, john whelan <jwhelan0112 at gmail.com>  wrote:

> For a small number it works well.  When faced with a sample with a thousand buildings it takes a little longer.I will work on speeding it up.  It this proves useful to the community, I may try and make it into a plugin (to also include the SelectNonOrthogonalBuildings function), which should be faster.  Advice from experienced JOSM developers welcome on this matter.

> So thank you kindly sir.You are welcome.  Glad to be able to help out.  

  
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