Determining safe landing zones is an essential part of many types of UAS missions. Candidates for safe landing zones can be calculated using terrain data and land classification along the planned route. In the flight planning safe landing zones can then be displayed, so that the drone can start its mission with good candidate areas where it can land safely. If needed the route can be dynamically adjusted to ensure that safe landing is possible during all of the mission.
Another vital part of UAV mission planning is the ability to calculate the best UAS route for a mission taking a number of parameters, including terrain and no-go zones into account. One type of such route is nap-of-earth flight that follows the terrain as much as possible making the drone difficult to detect.