MAGNET Office Site: Surface - Create Boundary

The Boundary group from the Surface tab of the MAGNET Office ribbon allows you to create and manage boundaries in the project.

It contains five icons.

1. In the Boundary group of the Surface tab, click the Create Boundary icon.

• The input panel for point creation is displayed at the bottom toolbar. Description of the fields may be found in the table below.

2. Locate the nodes of the boundary.

3. To enclose the boundary do one of the following:

• Locate the last point at the same place as the first point.
• Press Esc. The message window prompts to save the boundary. Click OK. The last created point will be connected with the first point with the shortest line possible.

The Edit Boundary dialog is displayed.

4. Review the properties of the newly created boundary, if needed change them.

5. Click OK.

The boundary polygon is created.

The Create Enclosing icon of the Boundary group allows you to create a boundary, which encloses a defined set of points.

There are three methods for enclosing boundary creation:

• Convex Boundary — creates a convex boundary around the extent of the selected points. The boundary will enclose all of the selected data.
• Tight Boundary — creates a boundary passing through each of the outer points selected, thus forming a shrink-wrap of the points.
• Closed — shrink wraps the selected points and entities to form a continuous boundary along the outer edges of the selection.

To create an enclosing boundary:

1. If needed, select the required entities.
2. In the Boundary group of the Surface tab, click the Create Enclosing icon.

   The Create Enclosed Polygon dialog is displayed.

3. In the Selection group box, define the base points and entities for boundary creation. Select one of the following rudiobuttons:
   • All — to use all existing points and entities.
   • Current Selection — to use only currently selected points and entities.
4. If needed, tick the Ignore points without elevation checkbox. Points with undefined elevations won't be used.
5. In the Method group box, select the appropriate creation method. See description above for details.
6. Click OK.

   The boundary is created.

The From Polygons icon of the Boundary group allows you to create a boundary from two or more existing connected polygons, i.e. polygons, which have common edge. Note that the original polygons won't be deleted.

To create a boundary from existing polygons:

1. In the Boundary group of the Surface tab, click the From Polygons icon.
2. In the Survey View, continuously select the required polygons.
3. When finished, press Esc.

   The boundary is created.

The Create List icon of the Boundary group allows you to create lists of existing boundaries and enclosed areas. This function defines a boundary for each closed area on the active layers displayed in the project.

To create a list of boundaries and enclosed areas:

1. In the Boundary group of the Surface tab, click the Create List icon.

   The Edit Boundary List Name dialog is displayed.

2. In the Name editbox, type the name of the boundary list.
3. If needed, tick the Include Existing Boundaries checkbox.
4. Click OK.

   The enclosed areas are converted to boundaries. The message window appears, displaying the boundaries, included to the list.

The Edit Lists icon of the Boundary group allows you to manage boundary lists.

To delete a boundary list:

1. In the Boundary group of the Surface tab, click the Edit List icon.

   The Edit Boundary Lists dialog is displayed.

2. Select the required list and click Delete.

   The message prompts you to delete included boundaries.

3. Click Yes or No as you need.

   The boundary list is deleted.

To delete a boundary from a list:

1. In the Boundary group of the Surface tab, click the Edit List icon.

   The Edit Boundary Lists dialog is displayed.

2. Select the required list and click Edit.

   The boundary list dialog is displayed.

3. Select the required boundary and click Delete.
4. If needed, delete more boundaries.
5. Click OK.
6. Click OK to close the Edit Boundary Lists dialog.

   The boundary is deleted from the list.