Usage Details:

x & y - The location of the landmark.

FeatureName - The landmark type.  Look at the Items List.

Rotation - Adjusts which direction the landmark is facing.

Size - Adjusts the object's size.  Not a multiplier.

? - Typically 0.  Values of -1 or less, or 1 or higher cause the landmark to not appear on the map.  Values between -1 and 1 seem to have no effect.

[GENERAL INFO]  [MORE DETAILS]  [EXAMPLE]  [ITEMS LIST]