Within the Advanced Settings menu of the flight plna you will find a menu of Mission Settings seen below. This is where you are able to edit Overlap, Mission Speed, and other settings of the flight plan.
Forward and Side Overlap
Your overlap values will define how quickly the sensor takes pictures through the mission (Forward Overlap) and the number of transects planned across your area (Side Overlap). By default these values are set to 70%, this is the minimum overlap you should use for any survey.
Increasing your Side Overlap will have a greater effect on how much area your drone will cover before running out of battery. Forward overlap has less of an effect on battery life since this is only commanding how quickly the sensor is capturing images.
By increasing either overlap value you are increasing the redundancy in your source data. Redundancy in your dataset is always a good thing, this will help the processing engine to avoid any holes in your final output caused by insufficient overlap. For further situation overlap recommendations see our Guidelines for Quality Orthomosaic and Guidelines for Quality 3D Outputs articles of the knowledge base.
The default Mission speed is set to 10 meters per second. This can be adjusted but you must keep in mind that the drone may slow down in order to meet your overlap standards. For an example- If you program a flight at 30 meters altitude and a 80% forward overlap you will have a difficult time programming the Mission Speed higher. Depending on the combination of flight altitude and forward overlap the drone may need to slow down to capture images at the right speed. Most sensors need at least 2 seconds between each capture.
Also speeding up the mission speed can lead to potential blur in your source images. Typically it is best to leave the Mission Speed at the default 10 meters per second.
Extended Flight Area
This is a switch within the mission settings that will allow the flight plan to extend its bounds slightly to get good coverage on the edge of the survey. The edge of any survey is more difficult to obtain correct overlap values. So if you plan a flight you should use this extended flight area approach or plan the flight to extend further than your true area of interest.
This feature allows the sensor to be locked at a particular angle outside of the standard Nadir view point used by default. The sensor will be locked at this angle throughout the flight while capturing images. It is most common to use this feature when planning an orbital flight.
In a standard flight the drone will move forward over the transect with the drone always facing forward and making each turn for the transects. The heading lock feature will force the drone to face one direction throughout the entire mission. So instead of turing with the transect it will be locked to a particular heading throughout each turn.