When a Geographic Coordinate System is assigned to a model, that coordinate system appears in the Auxiliary Coordinate System dialog. When it is made the active Auxiliary Coordinate System, it is possible to enter data to MicroStation in Longitude, Latitude format, and you can set coordinate readout to show Longitude and Latitude.
The Auxiliary Coordinate Dialog might look like this:
Double clicking on the Geographic Coordinate System makes it the active ACS. To get coordinate readout in Longitude, Latitude, either key in "set tpmode acslocate", or enable the "Running Coordinates" dialog in the lower right of the status bar and use the left click menu in that field to select the ACS Position option:
The Running Coordinates will then display Longitude, Latitude, and when you enter a tentative point, the tentative point readout also shows Longitude, Latitude. The mode, precision, and format of the longitude and latitude values is controlled in the Design File Setting dialog under the Working Units category.
Data points can be entered in Longitude, Latitude by setting the active ACS to the Geographic coordinate system and using the "point acsabsolute" keyin with the longitude and latitude entered in any of the following formats:
12.345 = 12.345 degrees 12^34.5 = 12 degrees, 34.5 minutes 12:34.5 = 12 degrees, 34.5 minutes 12d34.5 = 12 degrees, 34.5 minutes 12d34.5m = 12 degrees 34.5 minutes 12:34'56.7 = 12 degrees, 34 minutes 56 seconds 12:34'56.7" = 12 degrees, 34 minutes 56 seconds 12:34:56.7 = 12 degrees 34 minutes, 56.7 seconds 12d34m56.7 = 12 degrees 34 minutes, 56.7 seconds 12d34m56.7s = 12 degrees 34 minutes, 56.7 seconds
Negative values for longitude indicate western hemisphere, and negative values for latitude indicate the southern hemisphere.