#------------------------------------------------------------------------------- # This is a MicroStation V8 Unit Definition file. # # Lines that begin with # are for descriptive comments. # # $Copyright: (c) 2008 Bentley Systems, Incorporated. All rights reserved. $ #------------------------------------------------------------------------------- # # The active unit definition file is specified by the configuration variable # MS_CUSTOMUNITDEF. By default that variable refers to: # \Bentley\WorkSpace\System\data\units.def # # MicroStation uses its active units definition file in two instances: # # 1) Only the units defined in the units.def file are typically accessible in # the MicroStation user interface. To include all the known units in the # user interface, define the configuration variable MS_UNITS_SHOWALL. # # 2) The units.def file is consulted when converting data from file formats # with incomplete unit information. For example, V7 dgn files provide only # a two character unit label. This two character label is compared to the # labels supplied in the units.def file to determine the correct mathematical # definition. # # NOTE: In both of the above cases, when a unit from the unit definition file # conflicts with one of the standard units, the unit from the definition # file will be used. # # NOTE: Both standard and custom units are accessible via the "SET UNITS" keyin. # # The format of this file consists of one unit definition per line, where the # format of each line is: # # Label,Label,...,Label; Name(singular); Name(plural); Numerator; Denominator; Base; System # # Label: # Used to specify the default label for coordinate readout and dimensioning. A list of # labels can be provided but only the first is used by V8. The other labels are used # when loading a V7 format file, in which case the label for the V7 file's master unit # will be matched against all the labels that are provided. # # Name(singular) and Name(plural): # Used for display of the unit in dialog boxes. # # Numerator and Denominator: # Together these are used to define the size of the unit being described. The ratio of # numerator divided by denominator represents the number X of the new unit that make # up a single Meter. For example: 100.0 / 1.0 = 100.0 centimeters = 1 meter. To ensure # the greatest possible accuracy, it is highly recommended that both numerator and # denominator be specified as whole integer values. # # Base: # Only units of the same base can be compared. All linear distance units should use a # base of Meter. For nonlinear units such as degrees latitude or longitude specify # base Unitless. # # Valid values for Base are: # 0 Unitless # 1 Meter # # System: # Used to catagorize units for display in some dialogs. # # Valid values for System are: # 0 Undefined # 1 English # 2 Metric # #------------------------------------------------------------------------------- # # MicroStation Standard Unit Examples # #Label,Label,...; Name(singular); Name(plural); Numerator; Denominator; Base; System # SI (metric) units # #fm; Femtometer; Femtometers; 1000000000000000.0; 1.0; 1; 2 #pm; Picometer; Picometers; 1000000000000.0; 1.0; 1; 2 #nm; Nanometer; Nanometers; 1000000000.0; 1.0; 1; 2 um; Micrometer; Micrometers; 1000000.0; 1.0; 1; 2 mm; Millimeter; Millimeters; 1000.0; 1.0; 1; 2 cm; Centimeter; Centimeters; 100.0; 1.0; 1; 2 #dm; Decimeter; Decimeters; 10.0; 1.0; 1; 2 m; Meter; Meters; 1.0; 1.0; 1; 2 #dam; Dekameter; Dekameters; 1.0; 10.0; 1; 2 #hm; Hectometer; Hectometers; 1.0; 100.0; 1; 2 km; Kilometer; Kilometers; 1.0; 1000.0; 1; 2 #Mm; Megameter; Megameters; 1.0; 1000000.0; 1; 2 #Gm; Gigameter; Gigameters; 1.0; 1000000000.0; 1; 2 #Tm; Terameter; Terameters; 1.0; 1000000000000.0; 1; 2 #Pm; Petameter; Petameters; 1.0; 1000000000000000.0; 1; 2 # # # English units (based on International Foot) # ui; MicroInch; MicroInches; 10000000000.0; 254.0; 1; 1 mil; Mil; Mils; 10000000.0; 254.0; 1; 1 #pt; Point; Points; 720000.0; 254.0; 1; 1 #pica; Pica; Picas; 60000.0; 254.0; 1; 1 in,"; Inch; Inches; 10000.0; 254.0; 1; 1 ft,'; Foot; Feet; 10000.0; 3048.0; 1; 1 yd; Yard; Yards; 10000.0; 9144.0; 1; 1 mi; Mile; Miles; 10000.0; 16093440.0; 1; 1 # # # English units (based on U.S. Survey Foot) # si,in,"; Survey Inch; Survey Inches; 39370.0; 1000.0; 1; 3 sf,ft,'; Survey Foot; Survey Feet; 39370.0; 12000.0; 1; 1 #fat; Fathom; Fathoms; 39370.0; 72000.0; 1; 1 rd; Rod; Rods; 39370.0; 198000.0; 1; 1 pole; Pole; Pole; 39370.0; 198000.0; 1; 1 Perch; Perch; Perch; 39370.0; 198000.0; 1; 1 ch; Chain; Chains; 39370.0; 792000.0; 1; 1 #fur; Furlong; Furlongs; 39370.0; 7920000.0; 1; 1 #sm,mi; Survey Mile; Survey Miles; 39370.0; 63360000.0; 1; 1 # # # No System # #A; Angstrom; Angstroms; 10000000000.0; 1.0; 1; 2 #nm; Nautical Mile; Nautical Miles; 1.0; 1852.0; 1; 0 #au; Astromomical Unit; Astromomical Units; 1.0; 149597900000.0; 1; 0 #ly; Light Year; Light Years; 1.0; 9460730000000000.0; 1; 0 #pc; Parsec; Parsecs; 1.0; 30856780000000000.0; 1; 0