Split Polylines Command

The Split Polylines command of CivilGEO’s software allows the user to split one or more selected polylines into separate polylines using a cut polyline. When splitting polylines, make sure the cut polyline intersects completely through the selected polyline.

Note that when splitting a 3D element (i.e., 3D polyline), the software will automatically linearly interpolate the invert elevation at the cut location.

Follow the steps below to use the Split Polylines command:

1. From the Map Edit ribbon menu, select the Split Polylines command.
   
2. The Split Polylines dialog box will be displayed.
   

The following sections describe the Split Polylines command and how to interact with the above dialog box.

Selecting Polylines to Split

This section is used to manually select the polylines to be split from the Map View. Click the [Pick] button, and the dialog box will temporarily disappear. A prompt will be displayed on the status bar instructing the user to select the polyline(s) to split. The user can then select the polyline(s) from the Map View.

Once finished, press the [Enter] key or right-click and select Done from the displayed context menu. The Split Polylines dialog box will be redisplayed, and the total number of selected polylines will be shown in the Pick polylines read-only entry, as shown below.

The user can click the [Clear] button to cancel the previous selection and redo the entire process.

Note that if a polyline(s) has been preselected before running this command, the same number of selected polylines will be displayed in the Pick polylines read-only entry.

Defining Cut Polyline

The Define Cut Polyline section allows the user to either draw a cut polyline or select an existing cut polyline from the Map View.

The following options are provided for defining the cut polyline:

Drawing Cut Polyline

The Draw cut polyline radio button option allows the user to interactively draw a cut polyline on the Map View.

Follow the steps below to draw a cut polyline on the Map View:

1. Select the Draw cut polyline radio button option and then click the [Draw] button.
   
2. The Split Polylines dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user what to do next.
3. Draw the cut polyline on the Map View. While drawing polylines, 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.
   
   Note that the drawn cut polyline and the selected polyline(s) must be intersected.
4. After drawing the cut polyline, press the [Enter] key or right-click and select Done from the displayed context menu.
5. The dialog box will be redisplayed, and the status of the Draw cut polyline read-only field will be changed from Not Drawn to Drawn.
   

Selecting Cut Polyline/Polygon

The Pick cut polyline/polygon radio button option allows the user to select an existing cut polyline/polygon from the Map View.

Follow the steps below to select a cut polyline/polygon from the Map View:

1. Select the Pick cut polyline/polygon radio button option and then click the [Pick] button.
   
2. The Split Polylines dialog box will temporarily disappear, and a prompt will be displayed on the status bar instructing the user what to do next.
3. Select the cut polyline/polygon from the Map View.
4. After selecting the cut polyline/polygon, press the [Enter] key or right-click and select Done from the displayed context menu.
5. The dialog box will be redisplayed, and the status of the Pick cut polyline/polygon read-only field will be changed from Not Selected to Selected.
   

Note that the selected polyline(s) to split and the cut polyline should be different. Otherwise, the following informational dialog box will be displayed.

Splitting Polylines

Once the data have been properly defined in the Split Polylines dialog box, click the [OK] button. The software will split the selected polyline(s) along the defined cut polyline.