Math problem
May 3, 2018 08:33:01 #
I will be shooting a aerial video of a 25 mile long by 100 feet wide patch of undeveloped forest land. I was wondering if anyone knew the formula to calculated the altitude I would need to fly at to only capture the 100 foot wide path? I'm using a 94 degree FOV camera with a 20 mm prime lens. I hope this is enough info to calculate. TIA.
May 3, 2018 08:51:53 #
May 3, 2018 08:55:41 #
May 3, 2018 08:56:49 #
May 3, 2018 09:25:53 #
pentaxion wrote:
Approx. 47'
That's what I came up with also based on the 94 degree FOV.
May 3, 2018 09:59:18 #
bmike101
Loc: Gainesville, Florida
I wonder....how far away from the plot of land do you need to be to capture all 100 feet??
May 3, 2018 10:44:56 #
bmike101 wrote:
I wonder....how far away from the plot of land do you need to be to capture all 100 feet??
In what direction?
Vertically, about 47 feet.
May 3, 2018 10:46:31 #
May 3, 2018 11:54:28 #
spaceylb
Loc: Long Beach, N.Y.
A 20 mm lens has a field of view of 84º, not 94º. My trig works out to 55.53 feet...How tall are those trees?
May 3, 2018 12:57:56 #
spaceylb wrote:
A 20 mm lens has a field of view of 84º, not 94º. My trig works out to 55.53 feet...How tall are those trees?
(Hopefully the trees are not in the 100' wide path.)
May 3, 2018 13:29:47 #
Orangebird wrote:
... 25 mile long....undeveloped forest land.
You may have a greater problem. First you need to program the flight path because at about 3 miles out, you'll lose contact (and control). In sport mode at maximum speed of 44 mph, your battery will be drained at 21.5 miles, with 28 minutes flight time. Then I assume you want it to return? Enjoy the hike.
May 3, 2018 13:35:44 #
Thanks spaceylb. Would you share the formula so if I change the camera I can figure it out?
May 3, 2018 13:39:23 #
May 4, 2018 06:22:26 #
May 4, 2018 06:27:45 #
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