Autodesk 15606-011408-9005 - MAP R6.3 NAMED-10U PK, Tutorials Manual, Page: 92 / 332

You can also use AutoCAD Raster Design to georeference your data.
Georeferencing aligns the drawing objects to real-world locations.
Georeferenced drawings take advantage of many AutoCAD Map 3D features,
such as combining data from multiple sources.
This tutorial does not cover the required steps in AutoCAD Raster Design to
digitize and georeference drawings. Consult the AutoCAD Raster Design
documentation for this information.
For more information about AutoCAD Raster Design, see
http://www.autodesk.com/rasterdesign.
Set up a drive alias
When you edit drawings in AutoCAD Map 3D, others can work on those same
drawings at the same time. Individual objects are locked when you work on
them, so one person can edit part of a drawing while someone else works on
a different section.
To use this feature, follow the procedures in this lesson to set up a drive alias .
Georeference existing drawings
To incorporate existing drawings into maps, the drawings must be
georeferenced. Otherwise, the drawing objects do not align with features in
larger maps.
Maps use coordinate systems to describe the position of objects using their
longitude and latitude relative to a particular datum (an agreed-upon reference
point). Once you assign a coordinate system to a map, you can add data to
that map from drawings that use different coordinate systems. AutoCAD Map
3D automatically converts the data when you add it to the map, so everything
lines up.
However, if the incoming data does not have a coordinate system assigned to
it, there is no way to convert it. Instead, designate the position of the data
yourself.
This lesson shows you how to align objects in a non-georeferenced drawing
with features in a drawing with a known coordinate system.
Exercise 1: Set up a drive alias
A drive alias allows multiple users to use the same pathname for a drawing
stored on a shared drive. It allows each user to map that drive to a different
drive letter.
84 | Chapter 3 Tutorial: Moving From AutoCAD to AutoCAD Map 3D