Thanks Cody!
Currently, our contractor provides still, geotagged images taken from 3km altitude, footprint 2km*2km. We still have to georeference these imgs manually to track the change of vegetation on ground, monthly.
However, we would like to build our own workflow to make it more flexible and cheaper. We would like to take photos/videos at lower altitude (1km to 1.5km) in some cases to avoid the cloud. we do not take continuous shots, just where we want to see (monthly cutover, windthrow, earthworks...). I'm thinking about recording my targets with Garmin Virb then extract frames in my office. Each target only needs about 30-60 seconds.
Do you think frames from 4K 30fps (or higher) video is good enough to distinguish standing trees, falling trees and bare ground? We do not need super high resolution and highly precise georeferenced images, we can calibrate them.
We also think about taking the control unit from a drone, replace the camera to a better one (Sony A7000), put this system on a fixed wing aircraft, taking still images.
We can always take the still geotagged images, I just want to try something that can save our time from georeferencing too much
Thanks again for replying and hope that you will share your thoughts/idea with us.
Regards,
Alan