Specifies a drawing-units value for automatic scaling of blocks, images, or xrefs inserted or attached to a drawing.
0
Unspecified (No units)
1
Inches
2
Feet
3
Miles
4
Millimeters
5
Centimeters
6
Meters
7
Kilometers
8
Microinches
9
Mils
10
Yards
11
Angstroms
12
Nanometers
13
Microns
14
Decimeters
15
Dekameters
16
Hectometers
17
Gigameters
18
Astronomical Units
19
Light Years
20
Parsecs