If you are new to AutoCAD Map 3D,
your drawings might not be ready to take advantage of the features
in AutoCAD Map 3D. This lesson covers some ways to prepare your data.
Digitize and georeference
If your data is still
stored in paper drawings, you can use AutoCAD Raster Design to digitize
them and save them in AutoCAD drawing format.
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
To use this feature,
follow the procedures in this lesson to set up a drive
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
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.