For those interested in refining the usage of Google Earth imports into Litchi, I just wanted to pass along something I've discovered with the hopes its useful to others. Perhaps some of you may have figured this out already, and I apologize for the redundancy. There have been several posts and videos in most of the Phantom forums about using the Path tool in GE to take advantage of the GIS terrain data which will automatically provide altitude changes (AGL - above ground level - ready for 107?) over a given path - in our case a flight path for waypoint mission creation. [We create a path in GE, save the path as a KML file and import into Mission Hub at flylitchi.com.] Here's what I have discovered: 1. Let's say you create a path with a 10m buffer from the ground and your path is "relatIve to the ground" in GE. If your path STARTS (this will be Waypoint 1) at the lowest point and your next series of paths will realize INCREASES in altitude above the ground, the Litchi mission import will do a nice job of setting the waypoints with increases in altitude for each of the waypoints. Fine. HOWEVER, 2. If your path STARTS (WP#1) at the HIGHEST point of your mission plan and places path points over terrain that is DECREASING, or terrain that is lower or falling away from the starting point altitude, then, after importing that KML file into Litchi Hub, all of the waypoints altitudes will be what you entered into the starting altitude in your GE path screen. Litchi will show the elevation from starting point as XXm BELOW starting point. The elevation at all Waypoints will remain constant/unchanged if the ground level elevations are less than the ground elevation at WP#1 (mission start). This is difficult to convey in words - I suggest you try two short paths in GE. The first ascending over rising terrain and the second descending over the same path. Import both of them into the Litchi Hub and see how the hub sets up the waypoint elevations and the elevations from one waypoint to the next. On the waypoint information screens in Litchi (select an existing waypoint), buried and sitting very quietly under "Altitude" is some dynamic text: "Ground Elevation: 1m (0m below first waypoint)". This string of text will be critical to study if your mission plan descends over lowering terrain. Sorry to blab on ... this was a moment of important clarity for me. Thought I'd share for those who value their UAV experiences. Way too many folks overlook altitude in their missions and are crashing into terrain or terrain features. Litchi cannot account for anything that rises off the surface of the earth - trees, buildings, neighbors, neighbors friends, etc.