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

[Wayne Emerson, Jr.]

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. Thefirst 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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