Using Rubber Band

Use Rubber Band to adjust a range of station numbers by stretching or shrinking sections of a survey so that station numbers line up with known points along the survey.

Using Rubber Band allows you to re-align station numbers for a selected survey. After entering known station numbers for the first, last, and any other station numbers in between, Rubber Band adjusts remaining station numbers in a linear manner between known station numbers. Station numbers are then listed in ascending order (lowest to highest).

When you first use Rubber Band, the fields labeled Original and Target include two match point records by default. These match point records are the first and last station numbers in the selected survey. Station numbers in the Original field are the original station numbers initially stored in PCS Axis as a result of importing survey data, entering survey data manually, or receiving survey data from the Allegro Field PC. Station numbers in the Target field are the corrected or adjusted station numbers that you enter or are entered as a result of the Rubber Band feature.

To adjust a range of station stations using the Rubber Band function, follow these steps:

1	Click the Select ROWs button to open the Select ROWs window (Figure 7-56). Select the pipeline segment(s) with the facilities you want to work with, then click Save to close the window.

2	If the ISM module is not open, click Modules > Indirect Survey Manager (ISM).

3	Click Data Entry > Edit ISM Data to open the ISM data entry grid. Then click a button labeled with the type of continuous survey data you want to work with, such as the CIS button (Figure 7-75).

4	Select a survey folder with station numbers you want to apply the Rubber Band function. Click the down arrow in Selected Continuous Survey and select a survey folder in the selection list.

Note: If you want to collapse the Selected ROWs panel, click the Selected ROWs bar. Clicking the bar again expands the panel.

Figure 7-75. Edit ISM Data

5	Click Survey Maintenance to open the Survey Maintenance dialog box. Then click RubberBand (Figure 7-76).

6	To re-align station numbers in the survey, follow these steps:

a	If you want to re-align the first station number in the survey, type a new station number in the Target field located next to the first station number showing in the Original field.

b	If you want to re-align the last number in the survey, type a new station number in the Target field located next to the last station number showing in the Original field.

c	If you want to add new match points for known station numbers, click New to add empty Original and Target match point fields. Then type the station number you want to re-align in the Original field and the adjusted (or corrected) station number in the Target field.

d	If you want to delete a row of match points, select the row and then click Delete.

Note: Clicking Reset before clicking Apply resets station numbers to their original values.

e	Click Apply. When the Apply message displays, click OK to continue or Cancel to cancel the operation.

7	Click Refresh to update data in the ISM data entry grid.

Figure 7-76. Rubber Banding