Per-entity resolved scales: length mirrors store.lengthUnitScale's meaning (metres-per-raw-unit), area/volume mirror MeasureScales.
length
store.lengthUnitScale
area
volume
Optional
File-wide units, for a measure units leaves undeclared (a project without its own LENGTHUNIT).
units
The project's declared units, for measures outside the length family.
Per-entity resolved scales:
lengthmirrorsstore.lengthUnitScale's meaning (metres-per-raw-unit),area/volumemirror MeasureScales.