[Talk-ca] Building Import

[john whelan]

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 <jfd553 at 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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