[Talk-us-massachusetts] Is there a MA policy on mapping polygons with shared ways?

[Alan & Ruth Bragg]

Hi Wayne, Good question. I've tried both methods.
Simple polygons with overlapping ways are very easy to understand.
Multiple polygon relations sharing common ways might work better for folks
who think faster than me but I find them hard to understand.
Take a look at Mass Audubon in Wellfleet
https://www.openstreetmap.org/way/29848715#map=15/41.8792/-69.9921 where I
used multi polygon relations for all types tidal flats, wetlands, woods,
beaches etc. It gives me a headache just to trying to understand what I did.

I think it's better to keep it simple and only use multipolygons when you
need to put something inside something else.
Alan


On Thu, Oct 31, 2019 at 3:48 PM Wayne Emerson, Jr. via
Talk-us-massachusetts <talk-us-massachusetts at openstreetmap.org> wrote:

> In this weeks OSM weekly roundup http://weeklyosm.eu/archives/12467 there
> is this quote, "Adam Franco created two videos about working with
> multipolygons using JOSM. The??first one
> <https://www.openstreetmap.org/user/Adam%20Franco/diary/390981>??is about
> creating multipolygons for adjoining areas with shared ways. Please note
> that this type of mapping is being discouraged in many parts of the world."
>
> I wasn't sure which type of mapping was being discouraged. So for example
> if we have a swamp bordering a salt marsh, which is bordering a tidal flat,
> should we have 3 polygons with overlapping lines & shared nodes, or do we
> make them into multipolygon relations?
>
> Thanks,
>
> -Wayne / OSM:Rassilon
>
>
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