Sections
This command allows you to digitize section lines and store the
section data in the section file you have specified. The command
first prompts you the Digitize
Section Dialog. Enter the section file name and determine if
you want to digitize second and third sections at the same station.
Look at your plans and determines the station interval, which is
used to automatically default to the next station value when
digitizing a series of stations. If the grids at all the stations
have the same base elevation, toggle on Use Fixed Base Grid
Elevation. You can also toggle on Interpolate Zero Offset
Elevation, Prompt for Subgrades, Prompt for Save for Each Section
and Use Beeps with Prompts. Surface Snap Tolerance sets the maximum
distance that the program will automatically snap the tie back
point between the subgrade and design surface. Preview Method offers 2 ways to view
the sections as you digitize. "Graphic Dialog" displays the
section data in a grid dialog and is best when digitizing from
paper plans. "Draw on Drawing" draws 2D polylines in your CAD
drawing and is best when digitizing over an Image in your drawing.
"Keep Drawing Preview" will leave the 2D polylines in your CAD
drawing (having this checked off will erase the 2D polylines after
each station). Click OK to start digitizing.
Takeoff prompts you to calibrate the section sheet before you
digitize the section lines. You pick three points and specify their
offsets to the centerline and elevations in order to determine the
horizontal and vertical intervals. Corners on the section grid are
preferred reference points. Place your cursor at one end of the
section line and begin digitizing the line. While digitizing a
line, you can remove a mistake by pressing A on the puck or entering Undo on the keyboard. At the
end of the section line, press
Enter on your puck or keyboard. The station is completed,
and the station value is automatically incremented. The command
would prompts to digitize next section. You can press A on the puck or enter Exit on the keyboard to finish
digitizing. If you want to continue to digitize next section,
press Enter or enter the
new station number. For every station after the first one, you can
calibrate the grid sheet by picking one reference point and specify
its offset and elevation. After you digitize the section lines on
your drawing, all the section data would be saved in a section file
(.sct).
Prompts
Digitize Section
Dialog
Enter Section File Name, Station Interval, and
toggle on/off Use Fixed Base Grid Elevation etc.
Section station to digitize
<0.000>: press Enter to start with station 0.0 or
enter a station number
Calibrate section
sheet
Pick First section sheet reference
point: pick a
grid point of this station on your drawing
Enter offset
<0.0>: press Enter to accept the offset or enter the
offset of the point to the centerline
Enter
elevation: 1030 (enter the Elevation of the reference
point)
Pick Second section reference
point: pick
the second grid point
Enter offset:
0 (enter the offset of the
point to the centerline)
Enter elevation:
1040 (enter the Elevation
of the reference point)
Pick Third section reference
point: pick
the third grid point
Enter offset:
50 (enter the offset of
the point to the centerline)
Enter elevation:
1040 (enter the Elevation
of the reference point)
3 calibration points
Transformation
type:
Orthogonal
Affine Projective
------------------------------------------------------------------------------
Outcome of
fit:
Success
Exact Impossible
RMS
Error:
11.49
Standard
deviation:
2.38
Largest
residual:
14.08
At
point:
2
Second-largest
residual:
14.08
At
point:
1
Digitize break point for DRAWING1
section 0.000 (Enter to end): pick a point on the section line
Offset: -39.81 Elev: 1028.80
Digitize break point for DRAWING1
section 0.000 (Undo[A],Enter to end):
pick a point on the section
line
Offset: -9.94 Elev: 1030.03
Digitize break point for DRAWING1
section 0.000 (Undo[A],Enter to end):
pick a point on the section
line
Offset: 49.44 Elev: 1034.93
Digitize break point for DRAWING1
section 0.000 (Undo[A],Enter to end):
press Enter to finish
Save changes to DRAWING1 section
0.000 [<Yes(A)>/No(B)]? A (press A or B)
Exit[A]/Section station to
digitize <50.000>: 200 (enter next station number)
Calibrate next
section
Pick section reference
point: pick a
grid point of the station on your drawing
Enter offset
<0.00>: press Enter to accept the offset or enter the
offset of the point to the centerline
Enter elevation
<1030.00>: 1020 (enter the Elevation of the reference
point)
Digitize break point for DRAWING1
section 200.000 (Enter to end): pick a point on the section line
Offset: -40.40 Elev: 1008.07
Digitize break point for DRAWING1
section 200.000 (Undo[A],Enter to end):
pick a point on the section
line
Offset: -5.38 Elev: 1019.98
Digitize break point for DRAWING1
section 200.000 (Undo[A],Enter to end):
pick a point on the section
line
Offset: 27.86 Elev: 1030.02
Digitize break point for DRAWING1
section 200.000 (Undo[A],Enter to end):
pick a point on the section
line
Offset: 50.33 Elev: 1035.80
Digitize break point for DRAWING1
section 200.000 (Undo[A],Enter to end):
press Enter to finish
Save changes to DRAWING1 section
200.000 [<Yes(A)>/No(B)]? A (press A or B)
Exit[A]/Section station to
digitize <250.000>: A (press A to finish or enter the station
number to continue)
Keyboard Command:
digxsec
Prerequisite: Have a
digitizer board and a puck connected to your computer, and have
Wintab driver installed. The digitizer has been correctly set up.
Have done tablet calibration for current drawing.