It's funny, I was having the same idea recently while using the JOSM validator
on "finished" areas of TM projects.
JOSM validator already has a big red error category for duplicate buildings
(where there is 100% overlap). This crops up a bit in our finished projects,
but it shouldn't really. It's a clear data error. We should always fix
duplicate buildings. ....So I start by fixing them.
Then there's a JOSM warning called "crossing buildings". Again this is always a
data error actually, and ideally we'd fix all of these, but these are very
common in our finished tasks. Every case where a neighbouring building is drawn
over the top of the other, even ever so slightly. (Often we see buildings up
against each other in the imagery. To be purely strictly correct, these should
be mapped as ways sharing nodes, but it's understandable that folks don't
always get that quite right, and it doesn't actually matter that much). I
sometimes spend ages fixing all the "crossing buildings" warnings, but...
...among these there are some cases which are more important to fix, where
buildings are actually a kind of duplicate, but not 100% matching. The same
building drawn in twice by two different people (probably due to mapping at
around the same time).
So I've just been trying this script by first fixing the 100% duplicates using
the normal JOSM validator error, then next selecting these cases using the
script. It works! But it's a bit fiddly to set-up and use. I was imaging this
kind of logic, but as a refinement to the JOSM validator itself. Under the
"crossing buildings" warning list it could show the major/minor types of
crossing buildings.
Harry
From: john whelan <[email protected]>
To: "[email protected]" <[email protected]>
Sent: Friday, 24 November 2017, 22:50
Subject: [HOT] A new tool for spotting buildings that overlap by more than 50%
Mike Thompson was kind enough to build me a JOSM script.
https://github.com/MikeTho16/ JOSM-Scripts
SelectDuplicateBuildings.js
To Run:* Install JOSM's Scripting Plugin* Place above file in a convenient
location on your system * Click "Scripting" (on top menu bar)* Click "Run"*
Click "..." button and select this file.* Click "Run"
Selects duplicate, or near duplicate, area buildings in JOSM's active data
layer. A "near duplicate" is a building whose bounding box overlaps another
building's bounding box by more than 50% (I couldn't get a pure area compare to
work). Only the first building encountered of an overlapping pair is selected.
The selected buildings are added to the current selection.
Note clear the selection first then use the todo plugin to go through the
duplicated buildings.
Cheerio John
_______________________________________________
HOT mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/hot
_______________________________________________
HOT mailing list
[email protected]
https://lists.openstreetmap.org/listinfo/hot
