In the Atlantis project, the Outer Limit Generation menu is activated by right clicking on the folder 4. Outer limit, and choosing the Generate Outer Limit command. The menu shows the data sets in the Constraints, Formulae, and Outer Limit folders (note that all formula and constraint lines to take part in the combination procedure should be copied from the appropriate folders in the project and pasted into the corresponding folders in 4. Outer limit before proceeding). The outer limit line will be generated from a combination of these formula and constraint line pieces. Place a check mark next to the data sets in the Generate Outer Limit menu you would like to display and click on the pencil icon to show the actual lines in the display window. The lines in the picture are the various limit lines that are used for combining the new outer limit line. The different limit lines are indicated by text. The constraint lines consist of the baseline + 350 mile line and the 2500 meter isobath + 100 mile line. The formulae lines consist of the baseline + 200 mile line and all the FOS + 60 mile lines plus the 1% sediment thickness lines. Starting digitizingThe start point for digitizing is indicated with a marker and the text Start in the image. We begin at the crossing point between the 200 mile line and the FOS + 60 mile line. To start just activate the Digitize entry. The screen will then be set in 2D mode so that a single click with the left mouse button is enough for the primary digitizing which will attach the first point in the digitizing line to the nearest point on any curve from the cursor. The circle with radius 60 mileThe digitizing procedure will display a circle at the last position. The radius of the circle is the maximum distance that points are allowed to be separated and will serve as a guidance when digitizing and connecting to other points. |