This application will convert a Google Earth kml file to a Litchi csv file.
In Google Earth Pro
Use Google Earth Pro to navigate to the mission area.
From the ribbon select the "Ruler" tool.
In the Ruler tool, select the "Circle" tab.
Click once on the map at the desired point of interest (POI).
Drag to (and click) where the first waypoint is to be located.
In the Ruler tool click on "Save".
The New Path windows will open. Click OK.
In the "Places" window pane, right-click on "Circle Measure" and "Save Place As" a kml file.
In This Spiral Mission Maker for Litch Web Page
Select the desired units and direction of travel.
Select the number of revolutions desired (fractions are acceptable).
Select the starting, ending, and POI height
Google Earth Pro generates many waypoints on the circumference of the cicle that are not necessary for a Litchi mission. Use "Step Size" to skip waypoints. "3" is a good starting point.
Use the file chooser to upload your kml file.
Generate the mission and review the resulting parameters.
Download the csv file.
In the Litch Mission Hub
Use the Missions menu to import the csv file created by Spiral Mission Maker for Litchi.
Adjust the Litchi mission parameters as desired
A type of mission that I like to fly when capturing video is a "spiral
reveal". This is where the drone revolves around a point of interest (POI)
while gaining in altitude. Geometrically, this is probably better described
as a "coil" or "helix". Even though you can manually design such a mission in
Litchi, it is difficult to get a perfect circle, spiral, or coil in a waypoint
Using Google Earth Pro it is possible to define a perfectly circular path and
then convert that path into something that can be imported into the Litchi
Mission Hub as a waypoint mission.
This web application can take that circular path (from a kml file) and convert
it into a spiral (or coil) and compute the proper gimbal pitch angles so that
the camera always points at the POI. While you might be able to do this
manually, this application will make that process very easy, allowing one to
specify other parameters such as the beginning and ending heights.