UnitSystem
ReferencesON::LengthUnitSystem identifies a length unit system United States customary length units references: http://www.nist.gov/pml/wmd/metric/upload/frn-59-5442-1959.pdf http://en.wikipedia.org/wiki/United_States_customary_units http://en.wikipedia.org/wiki/International_yard_and_pound
Enum values
| Name | Value | Description |
|---|---|---|
| None | 0 | ON::LengthUnitSystem::None indicates no length unit system. The scale factor when converting between a specified unit system and None is always 1.0. ON::LengthUnitSystem::None is used as a unit system for models and instance definitions that should be imported or referenced with no scaling applied. |
| Microns | 1 | 1 micron = 1.0e-6 meters |
| Millimeters | 2 | 1 millimeter = 1.0e-3 meters |
| Centimeters | 3 | 1 centimeter = 1.0e-2 meters |
| Meters | 4 | SI meter length unit |
| Kilometers | 5 | 1 kilometer = 1.0e+3 meters |
| Microinches | 6 | 1 microinches = 2.54e-8 meters = 1.0e-6 inches |
| Mils | 7 | 1 mil = 2.54e-5 meters = 0.001 inches |
| Inches | 8 | 1 inch = 0.0254 meters = 1/12 foot |
| Feet | 9 | 1 foot = 0.3048 meters (12 inches) |
| Miles | 10 | 1 US statute mile = 1609.344 meters = 5280 feet |
| CustomUnits | 11 | The name of a custom unit and the conversion to meters are saved in the ON_UnitSystem class. |
| Angstroms | 12 | 1 angstroms = 1.0e-10 meters |
| Nanometers | 13 | 1 nanometer = 1.0e-9 meters |
| Decimeters | 14 | 1 decimeter = 1.0e-1 meters |
| Dekameters | 15 | 1 dekameter = 1.0e+1 meters |
| Hectometers | 16 | 1 hectometer = 1.0e+2 meters |
| Megameters | 17 | 1 megameter = 1.0e+6 meters |
| Gigameters | 18 | 1 gigameter = 1.0e+9 meters |
| Yards | 19 | 1 foot = 0.3048 meters = 12 inches |
| PrinterPoints | 20 | 1 printer point = 1/72 inch |
| PrinterPicas | 21 | 1 printer pica = 1/6 inch |
| NauticalMiles | 22 | 1 nautical mile = 1852 meters Approximately 1 minute of arc on a terrestrial great circle. Reference: http://en.wikipedia.org/wiki/Nautical_mile |
| AstronomicalUnits | 23 | 1 astronomical unit = 1.4959787e+11 meters An astronomical unit (au) is the mean distance from the center of the earth to the center of the sun. References: http://en.wikipedia.org/wiki/Astronomical_unit (1.4959787e+11 meters) http://units.nist.gov/Pubs/SP811/appenB9.htm (1.495979e+11 meters) |
| LightYears | 24 | 1 light year = 9.4607304725808e+15 meters A light year is the distance light travels in one Julian year. The speed of light is exactly 299792458 meters/second. A Julian year is exactly 365.25 * 86400 seconds and is approximately the time it takes for one earth orbit. References: http://en.wikipedia.org/wiki/Light_year (9.4607304725808e+15 meters) http://units.nist.gov/Pubs/SP811/appenB9.htm (9.46073e+15 meters) |
| Parsecs | 25 | 1 parsec = 3.08567758e+16 meters References: http://en.wikipedia.org/wiki/Parsec (3.08567758e+16 meters) http://units.nist.gov/Pubs/SP811/appenB9.htm (3.085678e+16) |
| Unset | 255 | The ON::LengthUnitSystem::Unset is used to indicate no unit system is set. This is a different condition from ON::LengthUnitSystem::None. |