Ossim Planet Primer

Concepts

The Camera

The camera, or eye, is a point above the planet surface that has a degree of vertical tilt.

Line of Sight

The position on the surface directly under the center of the screen. If the center of the screen does not cross the surface, this value is infinite, with lat/long of zero.

Nadir Point

The point on the surface of the planet that is between the camera and the planet center.

Eye Point

The Eye Point is a point provided by a NodeVisitor. This point is the position of the eye, relative to the node. This allows you to get the distance between the two by calling eyePoint.length().

The Land Model