I found out recently that Google Earth Pro is available for free. It has many features that make it the pro version, but so far I do not know what the all are. One feature I do like in the Pro version is the ability to draw a path and then see the elevation of the path. I recently used this for placing massing models for adjacent sites. I did not have any hard data on the elevations of the adjoining sites, but by drawing a path, and Showing the Elevation Profile, I was able to get the information I needed.