[Tagging] multiple schools on one plot
minh at nguyen.cincinnati.oh.us
Mon Apr 5 07:34:15 UTC 2021
Vào lúc 14:39 2021-04-03, Martin Koppenhoefer đã viết:
> sent from a phone
>> On 3 Apr 2021, at 21:49, Jeroen Hoek <mail at jeroenhoek.nl> wrote:
>> Yet landuse=residential can be named, such as when it marks the
>> boundaries of a housing project (obviously distinct from features that
>> are not landuse such as neighborhoods and other place tags),
> I am aware that it is rarely done (5% of all landuses have a name tag), but
> my suggestion is to deprecate this. It makes it impossible to add more detailed landuse, as this would exclude these areas from the „housing project“/named area.
This just reflects the fact that it's far easier to eyeball a bunch of
landuse areas from aerial imagery (or import them from a landcover
dataset) than to deliberately map a planned development by its name
(which requires either a ground survey or local knowledge).
It may not make sense everywhere, but in the suburbs of the U.S., it
does make sense to tag planned residential subdivisions as landuse. Data
consumers probably expect place features to more or less fit into a
local hierarchy, whereas a named subdivision can be as small as a few
houses  or more populous than many towns . Regardless of its size,
there's always a possibility of other landuse or landcover embedded
within. After all, it would be perfectly valid to map a house's front
lawn as landuse=grass or a parklet as leisure=park, but that doesn't
make the overall land any less residential.
> landuse should be about the usage of land, not imply other concepts like housing projects.
If over a decade ago we had devised a set of POI-like tags that parallel
the landuse tagging scheme, it might be possible by now to say that
landuse should basically never be named. But if a new landuse value for
schoolgrounds is inappropriate because that's a well-established use of
amenity=school, then the use of landuse for planned developments is also
here to stay. We even have some popular, documented subtags like
>> as can
>> landuse=retail for shopping centres.
> the tag for shopping-centers is shop=mall
> landuse=retail is for land primarily used for retail, and can contain any number of malls and shops, just like several landuse=retail could together describe a single mall.
shop=mall doesn't begin to describe the various kinds of planned retail
developments out there. Here in the U.S., bone fide malls are a dying
breed, but we have plenty of strip malls and other outdoor shopping centers.
"Land primarily used for retail" is a valid way to use the tag, but it's
a bit cruder than the use case that winds up with a name tag. In the
suburbs I'm used to, a landuse area starts out quite broad, then gets
broken down into more granular areas that acknowledge exceptions to the
general landuse that had previously been mapped. After a certain point,
it becomes possible to name many of the smaller landuse areas based on
on-the-ground verifiable characteristics like signs and differences in
landscaping, replacing earlier subjective decisions by armchair mappers.
minh at nguyen.cincinnati.oh.us
More information about the Tagging