<xs:element name="PolyLine" type="PolyLineType" minOccurs="0"><xs:annotation><xs:documentation>The optional PolyLine element gives a polyline representing the extent and boundary of the other surface feature.</xs:documentation></xs:annotation></xs:element>
The id attribute is the QIF id of the feature, used for referencing.
Source
<xs:complexType name="OtherSurfaceFeatureMeasurementType"><xs:annotation><xs:documentation>The OtherSurfaceFeatureMeasurementType defines the other surface feature measurement information for an individual other surface feature.</xs:documentation></xs:annotation><xs:complexContent><xs:extension base="SurfaceFeatureMeasurementBaseType"><xs:sequence><xs:element name="PolyLine" type="PolyLineType" minOccurs="0"><xs:annotation><xs:documentation>The optional PolyLine element gives a polyline representing the extent and boundary of the other surface feature.</xs:documentation></xs:annotation></xs:element></xs:sequence></xs:extension></xs:complexContent></xs:complexType>