zgf_type: zgf_clipwindow
Clip Window features describe a rectangular area to which other features should be clipped. Note that the ZGF Reader does not actually do any clipping, it simply reads these as rectangular features of type zgf_clipwindow.
The following table lists the attributes common to all zgf_clipwindow features.
| Attribute Name | Contents | 
| zgf_mode | Specifies whether or not the clip window is “on”, i.e. that other features should be clipped to this window. Range: 0 - off (don’t clip) 1 - on (clip) Default: No default | 
| zgf_units | See the Polyline section. |