2010

NOTE When positioning a model relative to sea level, the height of the Google Earth reference points must also
be measured relative to sea level. When positioning a model relative to the ground, the Google Earth reference
points must be measured relative to the ground.
Google Earth always places new placemarks at an altitude of zero, irrespective of whether that is relative or
absolute.
3 The Collapse on Export drop-down list allows different levels of collapsing parts of the model hierarchy in
the exported file. Choose from:
■ None - ensures the whole hierarchy is exported
■ All Objects - collapses everything into one node
■ Files - collapses each file into one node
■ Layers - collapses each layer into one node
4 Select the Enable check box in the Limit Number of Polygons area to restrict the amount of geometry
exported into the output file. Geometry is selected on the basis of taking the most obvious objects in
preference to the fine detail. If the exported file is too large for Google Earth to display, try enabling this
and reducing the number of polygons. Clicking View ➤ Scene Statistics in Autodesk Navisworks shows
the number of triangles and/or lines in the current project. By setting a polygon limit you are choosing to
export only some of these items.
5 The Origin position values are the first pair of reference points on the Google Earth surface, and must always
be defined. The Autodesk Navisworks reference point will always be positioned to exactly overlay the Google
Earth reference point.
Second and Third reference points can be used, and if enabled then the position and orientation of the
model can be more accurately defined.
6 Use the Import buttons to read-in saved placemark locations from KML files exported from Google Earth.
The Origin Import button differs slightly from the other two; if the KML file contains multiple placemarks,
this button will offer the user the choice of importing second and third reference points if available. The
other two buttons will only import a single reference point.
7 The Pick buttons allow the reference point locations to be selected in the Scene Area.
Google Earth KML Format | 265