Optional ReadonlyheadingHeading (degrees CW from north) about the local up axis. Default 0.
Optional ReadonlymodelIndex into models[] of the model to draw at this point (default 0; out-of-range → model 0).
Readonlyposition[lng°, lat°, height_m].
Optional ReadonlyscaleUniform scale, or per-axis [x, y, z]. Default 1.
A GeodeticInstance (position + optional scale/heading) plus which model in the library to draw.