[Talk-us] MassGIS Building Import - simplify

[Jeff Meyer]

Does anyone have a good definition of overnoding for the purposes of OSM?

Is it just whatever the algorithms for simplify line & simplify way say is
good with default parameters say?

Thanks, Jeff


On Thu, Dec 13, 2012 at 5:12 PM, Jason Remillard
<remillard.jason at gmail.com>wrote:

> Hi,
>
> I would like to continue the discussion on the simplification of the
> MassGIS buildings in a new thread.
>
> In my town, there are 5427 buildings. 43,628 nodes, or 8 nodes per
> structure. I did a 0.25 meter simplify on the entire town, and the node
> count went down to 41,809. We are looking at an excess of 5%. 0.25 meter
> may seem tight, but consider that source data was from 30cm and 15cm per
> pixel, and I am sure the algorithms used do some kind of sub pixel
> interpolation. Until I can figure out how to do the simplification from my
> scripts, we will add instructions on the wiki on how to do a 0.25 meter
> simply on the source layer in JOSM first.
>
> Thanks
> Jason
>
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-- 
Jeff Meyer
Global World History Atlas
www.gwhat.org
jeff at gwhat.org
206-676-2347
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