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Measurement unit options.
| Constant | Value | Description | 
|---|---|---|
| esriARUnitsUnknown | 0 | Unknown. | 
| esriARUnitsInches | 1 | Inches. | 
| esriARUnitsPoints | 2 | Points. | 
| esriARUnitsFeet | 3 | Feet. | 
| esriARUnitsYards | 4 | Yards. | 
| esriARUnitsMiles | 5 | Miles. | 
| esriARUnitsNauticalMiles | 6 | Nautical miles. | 
| esriARUnitsMillimeters | 7 | Millimeters. | 
| esriARUnitsCentimeters | 8 | Centimeters. | 
| esriARUnitsMeters | 9 | Meters. | 
| esriARUnitsKilometers | 10 | Kilometers. | 
| esriARUnitsDecimalDegrees | 11 | Decimal degrees. | 
| esriARUnitsDecimeters | 12 | Decimeters. | 
| esriARUnitsDegMinSec | 13 | Degrees Minutes Seconds. |