DEPRECATED. Use the x-axis definition of a diggs:LocalCartesianCRS. Aline, in the same absolute CRS, defining one edge (usually the top or bottom) of thesampling feature's surface.
<element name="referenceEdge" type="diggs:LinearExtentPropertyType"><annotation><appinfo><diggs:deprecated since="3.1.0" note="the x-axis definition of a diggs:LocalCartesianCRS"/></appinfo><documentation>DEPRECATED. Use the x-axis definition of a diggs:LocalCartesianCRS. A line, in the same absolute CRS, defining one edge (usually the top or bottom) of the sampling feature's surface.</documentation></annotation></element>