Graphics Programs Reference
In-Depth Information
Figure Prefix Database
As discussed, the linework code set handles how field codes are translated into line-
work commands, but what happens to those features once they are drawn? What
layer are they drawn on? Do they have any special purpose such as a property line
or breakline? The figure prefix database is the means by which these decisions can
be made up front for specific codes. For example, any feature drawn through points
coded EP (edge of pavement) will be drawn on the pavement layer and tagged as
a key component for establishing a hard edge in the 3D model of the terrain, also
known as a
breakline
.
Certification
Objective
Exercise 3.5: Apply a Figure Prefix Database
In this exercise, you'll assign a figure prefix database to your drawing and apply
its settings to the linework in your drawing.
If you haven't already done so, go to the topic's web page at
www.sybex.com/
go/civil3d2015essentials
and download the files for Chapter 3. Unzip the files
to the correct location on your hard drive according to the instructions in the
introduction. Then, follow these steps:
1.
Open the drawing named
Figure Prefix Database.dwg
located in
the
Chapter 03
class data folder.
2.
On the Survey tab of the Toolspace, click the Edit Survey User
Settings icon in the top-left corner.
3.
Click the Browse icon next to Figure Prefix Database Path. Browse to
and select the
Chapter 03
class data folder, and then click OK.
Note that some codes
are designated as
breaklines: EP (edge of
pavement), TOPD (top of
ditch), TOB (top of bank).
These lines can be used
to define hard edges in a
surface model.
4.
Click OK to dismiss the Survey User Settings dialog box. Right-click
Figure Prefix Databases, and select Refresh. Click the plus sign next
to Figure Prefix Databases to expand its contents. You should now
see Essentials listed under Figure Prefix Databases.
5.
Right-click Essentials, and select Make Current. Right-click Essentials
again, and, this time, select Manage Figure Prefix Database.
◀
6.
Scroll down, and examine the codes in the Name column. These match
the codes you saw in the text file containing the survey data.
7.
Click Cancel to dismiss the Figure Prefix Database Manager dialog box.
