Kinda weird, it goes up towards the middle of the flight.
On Fri, Feb 10, 2012 at 1:07 PM, andrzej zaborowski <bal...@gmail.com> wrote: > On 10 February 2012 18:53, andrzej zaborowski <bal...@gmail.com> wrote: >> On 10 February 2012 15:56, Jeffrey Warren <je...@publiclaboratory.org> wrote: >>> I checked a set of images from a Canon a490, and didn't see >>> temperature... maybe it's the EXIF program I'm using, "exif" (linux). >>> Attached is the output and the first image of the flight. Ideas? >> >> My desktop is down and I'm on travel, so I went installing all of the >> exif readers for Linux on the netbook and it seems like each one gives >> you a different set of tags. "exiftool" is the only one that gives me >> the temperature and a whole lot of other things the other programs >> don't. >> >> For the example image it says 31C, pretty hot :) >> >> The theory is that, on average and up to some altitude, temperature >> decreases 1C per 100m up. > > By the way the cameras also save the target distance in EXIF. I don't > know how it is measured technically, but in low flights (assuming the > camera is pointing down, is not set to focus on infinity, and is below > 65.536 m from the ground), it'll surely give you better accuracy. > > Cheers