Bonne chance
John
Begin Daniel wrote on 2019-03-19 2:14 PM:
I expect Pierre, Tim and others to send me any data they believe would
be problematic. If I send them my own test dataset, it may not cover
the cases they are interested in. J
Daniel
*From:*john whelan [mailto:jwhelan0...@gmail.com]
*Sent:* Tuesday, March 19, 2019 13:32
*To:* Begin Daniel
*Cc:* talk-ca@openstreetmap.org
*Subject:* Re: [Talk-ca] Building Import
It would make logical sense to preprocess all the data but then you
end up with two sources. The Open Data original and the preprocessed
data source.
From a logical point of view it would make sense to use the Microsoft
data to fill in the gaps. So add it into the preprocessed data.
Then you get to reality. To make it work across Canada you need to
get agreement and that I think will be the most difficult part.
Step one I think is ask Pierre nicely to review a sample and see if it
meets his "quality" expectations.
Step two would be check with Tim in Montreal for his thoughts.
If they are both in agreement that it is acceptable then we see if we
can get some sort of acceptance across the country possibly blacking
out certain areas.
If we can we'll need to go back to the import mailing list and say we
wish to combine two sources and amend the plan accordingly.
Otherwise it is up to whoever sorts out an import plan / import for a
particular area to consider its use.
Cheerio John
On Tue, 19 Mar 2019 at 12:59, Begin Daniel <jfd...@hotmail.com
<mailto:jfd...@hotmail.com>> wrote:
Hi all,
As mentioned a few weeks ago, I have almost completed the
development of a clean-up tool for the data to be imported.
So far, it removes nonessential vertices, orthogonalizes building
corners when reasonable and ensures walls’ alignment within given
tolerances. Building footprints that can’t be processed completely
are flagged accordingly, so they could be examined thoroughly at
import time.
Eventually, It should be easy to remove overlapping buildings
(potentially generated from a 3d mapping), but I doubt that
splitting terrace into individual buildings can be done
automatically.
The tool uses some parameters that need to be adjusted. I would
like that those who are interested in this aspect of the import
send me benchmark data that could be problematic. I will process
them to adjust parameters and/or the tool, and I will send back
the results to the sender for a thorough examination.
I should soon document the process in the “Canada Building Import”
wiki page (in a pre-processing section).
Thought? Comments?
Daniel
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