Quick Traverse

This feature allows you to utilize the keyboard and the mouse to perform a traverse using points and data found in the drawing and the coordinate file. There is no raw data entry associated with Quick Traverse.  The Quick Traverse feature has no ability to adjust the resulting traverse. If you wish to adjust coordinates, you could create a raw data file using the CGEditor - on the CGTrav menu - then use the Reduce Traverse feature, also on the CGTrav menu.

NOTE: If you wish to check the closure of a plat from bearing and distance data, use the CGEditor to create a map check file, then use the Reduce Map Check File feature on the CGTrav menu.

Prompts

During the process of entering data for the Quick Traverse feature you will see the prompt:
[aZimuth/Bearing/Deflection/Side shot/cUrve/Closure/horiz. distaNces]

At this prompt you may:
Change the type of angular input between Horizontal Angle, Azimuth and Bearing modes at any time.
Change how distances are specified as either slope distance and vertical angle or horizontal distance and vertical distance.

Turn the vertical angle input on or off.
Traverse around tangent and non-tangent curves.
Switch from Traverse to Side shot mode.
Traverse mode: automatically occupy the foresight point.
Side shot mode: continue to occupy the current instrument point until you change to
Traverse mode: and thus occupy another point.

Note: There are several settings found in the C&G Options dialog box that should be set or checked prior using the Quick Traverse feature:

The default values for the initial traverse input modes are set in the Traverse Options.

If you wish to calculate or enter elevations, check the Elevations : ON checkbox and choose Enter Elev. Or Calculate Elev. as desired in the Global Options tab. If you are calculating elevations, make sure the Vertical Angles ON checkbox is checked on the Traverse Options tab.

Quick Traverse Example

In this example the mode is set to traverse and elevations are on and are to be calculated.

After choosing Quick Traverse from the CGTrav menu you will be asked to enter the following information:

Instrument point: for the example enter 1 (assuming that the currently open coordinate file has a point in it with a point ID of 1).
Backsight point: for the example enter 2.

[aZimuth/Bearing/Deflection/Side shot/cUrve/Closure/slope distaNces.]
Enter horizontal angle <0.0000>:

Since elevations are on and set to calculate so you will be prompted for the following:
If you selected H.I. as Plus-Up on the Traverse Options tab, the coordinates and elevation of the instrument point will be read from the file and you will be prompted for the instrument height (H.I). 

If no elevation is found, you will be prompted to enter the ground elevation at the instrument point and then the H.I.

If you selected H.I. as Elevation in the Traverse Options dialog box, you will be asked to enter the actual elevation of the instrument scope.

Backsight Point: If you are turning angles or deflection angles instead you will be prompted for the backsight point.
Rod Height: With Calculate Elevations on you are prompted to enter the prism height.
You will be prompted for the horizontal angle (or deflection angle)

If you need to change the prism height <esc> and  you will be prompted for a new prism height, if you <esc> again you will be prompted for a new instrument point.

Angle data entry

Instrument point: 1
Back site: 2
{aZimuth/Bearing/Deflection/Side shot/cUrve/Closure/slope distaNce.] S
Enter horizontal angle <0.0000>:

When you are entering Quick Traverse data you have the options to change the angular input method.  To change the angular input mode, enter the upper case letter seen in the prompt for the method of entry you want to change to and  press <Enter>. The prompt should then change to reflect your choice.

Note: You need not use the shift and type a capital letter to choose a command line option. For example, to change to Side shot mode you can type either s or S.

The method that is currently set will not be shown as an option in the command line prompts. For example, if you type s and <Enter> for Side shot mode, the prompt will change to include Traverse and Side shot will no longer be available since you have chosen it as the current mode.

Traversing a curve

The Traverse routine allows you to traverse both reverse and compound curves.

Note: You will not be allowed to traverse around a curve if calculate elevation is selected.

If you type U  and <Enter> for cUrve, the following dialog  box  appears: U                                        Enter any two of the curve components.
Identify the curve bearing as Chord if the angle, deflection, bearing or azimuth about to be entered is to the PT.
Identify the curve bearing as Radius if the angle, deflection, bearing or azimuth about to be entered is to the radius point.
Click the Clockwise box if the curve is clockwise. If this box is not checked, the curve is considered to be counterclockwise.
If there is a previous traverse leg, check the Tangent Curve checkbox if the curve is tangent to the previous leg. If this checkbox is not checked, the curve is assumed to be non-tangent.
When you have entered the required data: click the OK button.

The input multiplication factor is applied to the curve data you enter (radius, arc length, chord, etc.).

At the next prompt, if the curve is a non-tangent curve, enter the angle, deflection, bearing or azimuth from either the PC to the PT or the PC to the radius point (depending on whether you set Curve Bearing to Chord or Radius).  If the curve is tangent to the previous traverse line you will not be asked for the angle and distance.
The curve data will be calculated and shown at the command line:
Bearing and distance from the PC point to the radius point.
Bearing and distance from the radius point to the PT point.
Bearing and distance from the PC point to the PT point.

Other curve information.
The radius and PT points will be stored in coordinate file using the STORING POINT prompt.

Closure

At the prompt: {aZimuth/Bearing/Deflection/Side shot/cUrve/Closure/slope distaNce.]
Enter horizontal angle <0.0000>:
Type C and <Enter> to view closure information for the traverse to the current foresight.

Slope/Horizontal Distance Data Entry

If you have selected Slope Dist/Vert. Angle in the Traverse Options tab or switched to slope distances by typing N and <Enter> at the command line, enter the slope distance.  Otherwise, enter the horizontal distance.

Note: The following steps are required only if Vertical Angles ON is checked on the Traverse Options tab or if Calculate Elev. was selected on the Global Settings tab.

For slope distance - vertical angle:
Enter the vertical angle.
Depending on the settings in the Traverse Options tab enter one of the following:
Zenith (zero up)
Nadir (zero down)
Transit (zero level)
Transit vertical angles can be full circle (0 - 360), or positive for up and negative for down.

For horizontal distance - vertical distance:
Enter the vertical distance.

Pulldown Menu Location: CGTrav
Keyboard Command: QTR, CG_QTRAV
Prerequisite: Open Coordinate File