Street View Points of View (POV)
The Street View location defines the placement of the camera locus for an image, but it does not define the orientation of the camera for that image. For that purpose, the GPov object literal defines three properties:
* yaw defines the rotation angle around the camera locus in degrees relative from true north. Yaw angles are measured clockwise (90 degrees is true east).
* pitch defines the angle variance "up" or "down" from the camera's initial default pitch, which is often (but not always) flat horizontal. (For example, an image taken on a hill will likely exhibit a default pitch that is not horizontal.) Pitch angles are measured with negative values looking up (to -90 degrees straight up and orthogonal to the default pitch) and positive values looking down (to +90 degrees straight down and orthogonal to the default pitch).
* zoom defines the zoom level of this view (effectively proscribing the "field of view") with 0 being fully zoomed-out. Different Street View locations may provide higher or lower zoom levels.
By default, these values are all 0 and define a flat horizontal view directly north with the widest possible field of view.