[x3d-public] Latitude/Longitude units

[Holger Seelig]

My interpretation was that with version 3.3 the UNIT statement defines 
what unit a angle value has. And therefore on default the angles of 
geodetic coordinates should be in radians. The author has then with the 
UNIT statement the choice to define its preferred angle unit.

Holger

Am 13.04.2016 um 06:16 schrieb Andreas Plesch:
> http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/components/geodata.html#Specifyinggeospatialcoords
>
> defines that coordinates in the GD geoSystem are given in angular base
> units.
>
> http://www.web3d.org/documents/specifications/19775-1/V3.3/Part01/concepts.html#t-Standardunits
>
> defines the standard angle unit to be radians.
>
> Cobweb interpretes this to mean latitude/longitude in geoCoords are
> given in radians which I think should not be the intention of the spec.
> All geospatial example scenes use degrees. So I hope this is a
> misinterpretation.
>
> Although section 25.2.4 as linked goes on to assume that the base
> angular unit is degrees, it is a bit unclear what unit is really expected.
>
> If more precise language is needed, I suggest simply to add "angular
> base units of degrees" to section 25.2.4 .
>
> Andreas
>


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Holger Seelig
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