On 05/08/2016 13:41, Colin Smale wrote:
What I meant was, having established that some (many?) schools will
need to use the MP model, all consumers (for this data) will need to
be ready to process MPs anyway. A single polygon consisting of a
single way is just a degenerate case of an MP. Modelling all of them
as an MP saves an "if" statement and a second set of logic to process
the data.
The single, closed way and the trivial MP containing such a way are
entirely semantically equivalent. There is no need to have two ways of
representing exactly the same information.
What I meant was, it makes it more time consuming for those mappers who
add data.
If the school (or whatever) needs to be edited & I see it's an MP, to
ensure I'm amending all instances correctly I have to do a search for
all members. A bit irritating when I find it's solitary.
There's a clue in the name multi-polygon that singular entities
shouldn't be tag as such.
Dave F.
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