Technical data

Chapter 6 Creating Cadastral Information
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Backwards Compatibility with Single-User
Alignment Databases
To share the alignment database with someone using Release 1 of
AutoCAD Land Development Desktop, you can save the
alignment database as a project.adb file, the previous format of
the alignment database. To do this, use the Save as .adb command
on the Alignments ➤ Alignment Commands menu.
For more information about the alignment database, use to look
up “Overview of the Horizontal Alignment Database” in the online Help.
Drawing Alignment Geometry
Alignment design begins by drawing alignment geometry. You need
to draw only the alignment centerline—you can create offsets later by
using an automated offset routine. To draw the alignment centerline,
you can use the line, arc, and spiral commands in the Lines/Curves
menu, as well as CAD commands such as ARC, LINE, PLINE, and
FILLET. You can also draw alignments as Autodesk Survey Figures
either in the field using the Autodesk Survey Command Language to
input the data in a data collector, or on the Autodesk Survey
Command Line.
When you draw the alignment, use object snaps to ensure that no
gaps exist between each object that makes up the alignment.
You can use a polyline to draw an alignment if you need to create
only simple lines and arcs. However, if you define an alignment from
a polyline, then you cannot graphically select it to make it current or
to identify it.