Scan pattern visual overlap

Visual coverage depends on:

• separation between rows
• field of view of the camera
• altitude.

At 100%, there is complete visual coverage of the area with no overlap. (Assuming plane stays perfectly on course between waypoints).

At 150%, half of each row overlaps the adjoining row.  This ensures complete coverage even the plane is pushed a little off course, and that photo stitching has common areas to work with.

At 200%,  each row overlaps completely, so all areas are included in two photographs

At 400%,  rows are so close together that all areas are included in four photographs.

Anything above 200% is probably "overkill" for most applications.