Create Holes Command

This article describes how the Create Holes command of CivilGEO software allows the user to create holes within an existing polygon.

Follow the steps below to use the Create Holes command:

1. From the Map Edit ribbon menu, select the Create Holes command.
   
2. The Create Holes dialog box will be displayed, as shown below.
   

Selecting Polygon to Create Holes Inside

The Select Polygon to Create Holes Inside section allows the user to select a polygon in which the holes are to be created.

Follow the steps below to select a polygon:

1. Click the [Pick] button.
   
2. The Create Holes dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select a polygon on the Map View to create holes.
3. After selecting the polygon, the user is immediately returned to the Create Holes dialog box, and the status of the Pick polygon read-only field will be changed from Not Selected to Selected.
   
   Note: Click the [Clear] button to cancel the previous selection and redo the entire process.

Defining Holes to be Created

The Define Holes to be Created section allows the user to define the polygons that will be used to create holes.

The following options are provided to define the polygon holes:

Drawing Polygon Hole

The Draw polygon hole radio button option allows the user to draw a polygon hole on the Map View.

Follow the steps below to draw a polygon hole:

1. Select the Draw polygon hole radio button option and click the [Draw] button. The Create curvilinear polygon hole checkbox option can be used to draw the polygon hole using curvilinear segments.
   
2. The Create Holes dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to draw the polygon hole.
3. Draw the polygon hole on the Map View. Note that the user can draw only one polygon hole at a time.
   While drawing a polygon hole, the user can use the [Ctrl] key to switch between linear and curvilinear digitizing. Refer to this article in our knowledge base to learn more about the drawing elements on the Map View.
4. After drawing the polygon hole, press the [Enter] key or right-click and select Done from the displayed context menu.
5. The Create Holes dialog box will be redisplayed, and the status of the Draw polygon hole read-only field will be changed from Not Drawn to Drawn.
   

Pick Polygon Holes

The Pick polygon holes radio button option allows the user to manually select single or multiple polygon holes from the Map View.

Follow the steps below to select the polygon holes:

1. Select the Pick polygon holes radio button option and click the [Pick] button.
   
2. The Create Holes dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user to select the polygon to create holes.
3. After selecting the polygon holes, press the [Enter] key or right-click and select Done from the displayed context menu.
4. The Create Holes dialog box will be redisplayed, and the total number of selected polygon holes will be displayed in the Pick polygon holes read-only field.
   

Creating Polygon Holes

Once the options have been defined, click the [OK] button and the software will create holes in the selected polygon.