[Geowanking] [Geojson] simple 3D geocode for AR
crschmidt at metacarta.com
Fri Aug 28 10:14:05 PDT 2009
On Fri, Aug 28, 2009 at 09:56:54AM -0700, Andrew Turner wrote:
> Just include a 3rd coordinate in GeoRSS-Simple point or GeoJSON point.
> No, this is not explicitly valid.
This is explicitly valid in GeoJSON:
A position is represented by an array of numbers. There must be at least
two elements, and may be more. The order of elements must follow x, y, z
order (easting, northing, altitude for coordinates in a projected
coordinate reference system, or longitude, latitude, altitude for
coordinates in a geographic coordinate reference system). Any number of
additional elements are allowed -- interpretation and meaning of
additional elements is beyond the scope of this specification.
> But you see where that discussion
> gets us. Long windy roads of elusive semantic talk (arguably necessary
> in the lon term, but not simple or useable *now*, which is when people
> are building these tools).
> If we lose interest without achieving a near term concensus,
> developers will just do arbitrary, different solutions. Give them a
> simple answer now, even if it makes your strict-validation-only-skin
> crawl just a little bit. :)
> So I say just do it, and we'll catch up with documenting it as uses
> Also, KML already supports 3D points.
> (via mobile)
> On Aug 27, 2009, at 4:35 PM, Mike Liebhold <mnl at well.com> wrote:
> > A friend wrote me with a request for clarification on a topic we've
> > discussed many times here, but every time we've approached a
> > consensus the answer seems elusive.
> > Many devleopers are starting to create applications for iPhones and
> > Android phones to view location specific data through the
> > viewfinder using the -imprecise- capabilities of the built in gps
> > and compass and applications platforms like Layar.
> > The question:
> > What is the -simplest- way to geocode a geoannotation in 3D using
> > geoRSS/Atom, geojson, KML ....?
> > (Is there a practical reason why WGS '84 shouldn't be implicit, and
> > a CRS lookup NOT be required?)
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> > Geojson at lists.geojson.org
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