Reference
Centerline Coordinate List Memo, August 25, 2003

The Centerline Coordinate List Program is broken out into three major components.

• Set COGO Information
• Create Centerline Coordinate List
• Create Centerline Coordinate Sheet

Set COGO Information

Optimal Settings for Geopak COGO User Preferences

Note the differences between the station formats and output accuracy in stationing and angle depending on the Unit System used. This is a direct correlation to the preferences used in NCDOT Roadway plans.

The Initial State of the Centerline Coordinate List Program

Once the Job Number, Chain, and Increment distance have been selected, the Beginning and Ending Station fields are automatically populated.

Again, note the stationing format depending on the Geopak COGO Preferences settings.

Designers can edit the Beginning and Endings Station fields by keying in the numeric station values and it will automatically reformatted to the station format. If a station entered is not within the selected chain, the beginning or ending station is entered in its place. Anytime the Designer wants to know the beginning and ending stations for a selected Chain, place the mouse pointer to the Beg Sta: or End Sta: label and then the station information is displayed.

As an added feature, if either of these two labels is clicked on, the beginning and ending stations are resetted back to the original default value.

Create Centerline Coordinate List

If the Create button is clicked, then an Excel Centerline Coordinate List is generated.

The Program then prompts the Designer if additional Chains are to be appended to the list.

Note that the Job Number combo box has changed color to red and it is now locked.

There are a series of tests the program goes through at this stage. Three of which are considered "critical" and will exit the program completely. The series of tests are performed in this order with the corresponding error and action to fix message.

Critical error raised if NCDOT V8 Workspace not configured and set.

Critical error raised if the Excel template file used in the program is not found.

Critical error raised if the Excel spreadsheet file has been terminated when the program is going to write to it.

Error raised if the chain stationing is not in the correct order.

Error raised if the beginning chain station is not within the chain.

Error raised if the ending chain station is not within the chain.

Error raised if the beginning chain station is not an even station..

Warning message raised if the beginning chain station is not an even 100 station.

Create Centerline Coordinate Sheet

While the Centerline Coordinate List (XY_COORD_L) is being generated, the Centerline Coordinate Sheet (Centerline Coordinate Sheet) is also being generated. There are two sheets with a maximum of 820 point numbers.

Note that "easy" print buttons have been created for Roadway Design prints only with the Centerline Coordinate Sheet.

Before closing, the spreadsheet, Designers are prompted to save or not save the generated spreadsheet file. If the spreadsheet is to be saved, then save as an Excel (XLS) file in the \\Roadway\Proj folder..