Useful Settings in Google Earth
http://www.surveydrawing.net/
ESurvey KML
Google Earth is a geo-browser which represents the Earth as a three dimensional globe. It is a great tool to Explore Earth Imagery. On the other side CAD Package which works with UTM is more convenient to represent 2-D Drawings. Converting data available in Google Earth in the form of KML File to 2 Dimensional drawing data and Vice Versa is possible with ESurvey KML.
ESurvey KML (Export) - Export your CAD Data to Google Earth, readable format (KML File)
ESurvey KML (Import) - Import Places information from Google Earth KML File to your CAD Package"