Menu | Tools > Bounding Polygon > Digitize New Bounding Polygon |
Pop-up | Bounding Polygon > Digitize New Bounding Polygon (Layers window) |
Raster surfaces, point clouds and variable resolution (VR) surfaces created or updated in CSAR format automatically include a bounding polygon that encompasses the entire extents of a surface or coverage. This polygon is not included in the display by default. If you want to view or edit the polygon, you must first add it to the display using the Add Bounding Polygon Layer command from the pop-up menu. See Add Bounding Polygon Layer for more information.
Coverages created or updated in CSAR format include a bounding polygon that encompasses the entire extents of a coverage. If the polygon created automatically for the selected coverage is not acceptable, a new polygon can be created manually or automatically. When re-digitizing an entire polygon, the existing polygon will need to be removed manually.
By default, the polygon is digitized using the Point-to-Point method. You are not limited to this method, however, there are several digitizing methods available. The method can be changed at any time without damaging the polygon. For more information on the digitizing methods, see Digitizing in the Features Editing module.
The Grab tool is a useful digitizing tool when creating polygons. It enables you to select a pre-existing polygon feature on another layer and it then creates a copy of the feature on the Bounding Polygon layer. See Grab for more information.
Related commands:
• Edit Selected Bounding Polygon
• Rebuild Bounding Polygon Automatically
Procedure
1. Open a Surface or Point Cloud.
2. Select the Bounding Polygon layer for the surface.
3. Select the Digitize New Bounding Polygon command.
Digitizing mode is enabled. Note the change in the cursor’s appearance.
4. [Optional] Right-click and select Edit Line to choose an alternate digitizing method.
5. Click the Display window to add vertices until the polygon has the appropriate shape and size.
If necessary, the <Backspace> key can be used to remove the last vertex added. |
6. Use on of the following methods to turn off Digitizing mode and complete the bounding polygon:
• Select the Digitize New Bounding Polygon command again.
• Right-click in the Display window and, from the pop-up menu, select Edit Line > Close Area.
• Press the <End> key.
The newly digitized bounding is added to the display.
