Rob Wooding & Associates

Aerial Survey Consultants

Video


Video mapping describes the rapid acquisition of aerial imagery which is only loosely geo referenced.  This is well suited to studying continuous features such as roads or other utilities. 

In one form a forward loooking camera gathers continuous imagery which is GPS referenced to a moving map.  The user can later replay the imagery, jump from area to area by mouse click on the map, tag points of interest and even take approximate measurements.

In another form the camera is aimed vertically and a continuous mosaic is captured.  Using simultaneously acquired inertial attitude data and GPS positions, the individual frames are rotated and scaled into a continuous mosaic.  For high resolution video cameras this is done frame by frame.  For low resolution cameras it is done by clipping only the central slice from each frame.

In yet another form, which has particular application in shoreline and beach studies, a sideways looking camera captures continuous imagery which is then mosaiced.  This form of mosaic is very effective but difficult to produce.