numeric
The current ratio of modeling meters to screen pixels in graphic_window. For example, a value 2 means that 1 screen pixel represents 2 meters in world co-ordinates.
Its value is maintained automatically by the system and changes whenever the current view does. The value can be changed but only for orthographic views and will result in a window redraw.
For plan views in longitude/latitude, the latitude of the mid-screen point and earth radius is used to get a decent approximation.
window.pixel_factor is also available and provides the ratio with respect to current modelling units rather than meters.
Structures: