[Imports] RFC for Denver Planimetrics Buildings Import
carriere.denis at gmail.com
Tue Oct 3 01:52:20 UTC 2017
To start off, great import wiki! +1 on my vote
Just wanted to comment on the spatial joins you are performing, we
experienced the same pitfall when conducting Ottawa's OSM building import.
> To achieve a match, two spatial joins were performed with the OIT address
points and roofprint polygons. First using “point falling inside polygon”,
then using “closest point” for the remaining records.
1. *Address fall inside polygon* (Should be a match)
2. *"Closest point"* - Normally the closest polygon doesn't mean that's the
main building, it could actually be a shed or a garage depending on how
accurate the address point is.
*How we solved that issue:*
1. Using parcel data (seems like you have access to that type of dataset)
find all the buildings which are contained inside that parcel.
2. Exclude sheds & garages (sqft 240 or less)
3. Find the largest area building (typically the main building).
4. If more than 3 buildings in the same parcel, ignore matching since this
would be typically a farm land and it would be impossible to automatically
match the address point with multiple building footprints.
Best of luck with the import!
*GIS Software & Systems Specialist*
On Mon, Oct 2, 2017 at 8:17 PM, Russell Deffner <russdeffner at gmail.com>
> Greetings everyone,
> After a long discussion and planning period locally, we are pleased to
> announce the plan for importing Buildings in the Denver metro of Colorado,
> United States.
> The import wiki is here: http://wiki.openstreetmap.org/
> A few notes:
> * As you can see in the schedule on the wiki-page, this has been under
> discussion with the local community since the beginning of the year. We
> hope that all questions and concerns have been raised and addressed either
> on the talk-us and imports-us mailing lists and/or one of our many meetups.
> * We’re working on a nicer workflow document coming soon.
> * We’re working on getting the processed data hosted for review, also
> coming very soon.
> Please use the discussion tab on the wiki-page or a reply to imports@ so
> the entire team can follow, although you’re welcome to contact me directly
> as well;
> Look forward to your comments,
> Russell Deffner
> russdeffner at gmail.com
> *https://www.meetup.com/OSM-Colorado <https://www.meetup.com/OSM-Colorado>
> Imports mailing list
> Imports at openstreetmap.org
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