DGNIMPORT Unit Mapping Table

The following table lists the linear units used in the resulting DWG file as determined by the master units, sub-units, and unit precision of the DGN file being imported.

DGN to DWG Unit Mapping Table
DGN Master Units	DGN Sub Units	DGN Precision	DWG Units	Notes
Feet	Inches	Decimal	Engineering
Feet	Inches	Fractional	Architectural
Inches	Inches	Decimal	Engineering
Inches	Inches	Fractional	Architectural
Inches	Any Other Unit	Decimal	Engineering	Master Units selected in the Import DGN Settings dialog box.
Inches	Any Other Unit	Decimal	Decimal	Sub Units selected in the Import DGN Settings dialog box.
Inches	Any Other Unit	Fractional	Architectural	Master Units selected in the Import DGN Settings dialog box
Inches	Any Other Unit	Fractional	Fractional	Sub Units selected in the Import DGN Settings dialog box
Inches	Any Other Unit	Decimal	Decimal
Any Other Unit	Any Other Unit	Fractional	Fractional

For import of a V7 file, Master unit label will be read and will use the following table to set the Master units based on the unit translation table. The Resolution value will be used to set the Sub units.

Note: Unknown labels will be treated as “meters” and “decimeters.”

V7 DGN Unit Translation Table
DGN Label	Name	DGN Label	Name
km	kilometers	mi	miles
m	meters	yd	yard
dc	decimeters	ft	feet
cm	centimeters	in	inches
mm	millimeters	tn	1/10 feet
um	microns	ti	1/10 inches
		ui	micro inches
		‘	feet
		“	inches
		‘	feet