Coordinate Systems in MicroStation are available from a Library. It is up to you to choose the appropriate coordinate system for the area and details that you are mapping. MicroStation uses the geographic coordinate system library to map the three-dimensional surface of the earth to a two-dimensional surface, the design plane. So whether you choose a Geographic coordinate system (unprojected, L/L), or a Projected (ft/m) system, MicroStation positions the data in the correct location for you. The following papers may be helpful in understanding the interaction between the coordinate systems, projections, and data. You should also use the Running Coordinates/ACS Position settings to control coordinate system input & readout: - U.S. Coordinate Systems in MicroStation V8i and Bentley Map V8i - Understanding Mapping Reference Frames for Engineering Projects - Grid to Ground - Convert Local Coordinate Systems to Standard Coordinate Systems - FAQ : Coordinate System Workflows Within Bentley Map V8i Releases
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