[Geowanking] simple 3D geocode for AR

[Joshua Lieberman]

a 2-D not 3-D WGS84 is the default for GeoRSS, but there is also an  
elev attribute whose default is number of meters above geoid (e.g. GPS  
elevation). For an imprecise geoannotation, height relative to terrain  
would probably be more useful (georss:floor but that is in units of  
building floors). A perspective might also be important (not currently  
defined in GeoRSS) if the geoannotation has been applied to one side  
of a vertical feature.


On Aug 27, 2009, at 7:35 PM, Mike Liebhold 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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