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Another way of obtaining the shooting azimuth from a plane would be interpolate betwwn two consecutive coordinates (before and fater shooting) obtained from the GPS. Then all you need is to tell the program wheter you where you shooting over the left or right side of the plane.
I assume that some test should be done to get the optimal time interval between the two coordinates, and that this will vary with the GPS accuracy.
GISDK provides an Azimuth fucntion. Unfortunately, it does nor provide a function to get a coordiante given an azimuth and a distance, but si should involve not much extra programming.
Cheers
Armando
Larry Teeters wrote:
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----------------------------------------------------------------------Mike;
Isn't it great to know others are working and are interested in your
activities! Here are a couple ideas I'd like to share.One of the e-mails stated the aircraft direction at the time the photo was
taken was important. Here is a method we used on a prototype project to
locate power poles while driving down the road. Maptitude is absolutely
GREAT for making it easy to TAKE THE GIS TO THE FIELD. We connected a GPS
directly to a laptop with Maptitude on it and drove down the road with the
G.P.S. points being logged automatically (every second). We then hit a key
to indicate a pole was 90 degrees left or right of our track The GISDK
routine recorded the time the and computed the distance and direction of
travel from the last 2 logged Points. The time is recorded in milliseconds.Consider simply logging during the entire flight then even without any
real-time interface you could find your direction. Another idea is to CLICK
/download / Geo-reference Real-time.Lets see TIP / TILT are still variables but since Maptitude will receive the
Altitude from G.P.S. and if you had a D.E.M. of that area, you would be
able to compute what the camera would see from that altitude. That is if
the camera pointing straight downWe want to use our Experimental aircraft (super slow) to do Photo shoots
using a digital camcorder(Cannon GL1). How could we get the lat-lon onto
that?Sorry about the wordiness but So it goes.
Onward.
Larry T.
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