FIELD OF VIEW GeoSnap Pro, User Manual

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© Field of View 2018 GeoSnap Pro User Manual
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Image numbering
DSLR-style cameras typically have two main options to handle file numbering. (The Canon 6D
has Continuous and Auto Reset; the Sony A6000 has Series and Reset). Continuous/Series file
numbering continuously numbers the images, even between power cycles or between cards,
etc. When the file numbering is set to Continuous, the Canon 6D has an option to reset the
numbering back to 1 by selecting the Manual Reset option. This will reset the numbering back to
1 then return to continuously numbering the images from there. The Sony A600, however, does
not have a Manual Reset option. Auto Reset/Reset file numbering resets the file numbering to 1
anytime that there is an SD card inserted that has no images on it or that the camera card is
formatted.
Method 1
The recommended method for handling file name synchronization is to set the camera’s file
numbering setting to Auto Reset. Then, before you start a new mission, clear all images off of
the camera’s SD card and delete the IMAGENUM.txt file off of the GeoSnap card. This will reset
both systems to start image numbering at 1.
Method 2 (only for Canon 6D)
(Note: This method requires unobstructed access to the camera screen and menu buttons.)
Alternatively, you can set the Canon’s “File numbering” option to Continuous and do a Manual
Reset to start it at 1. Delete the IMAGENUM.txt file off of the GeoSnap to start it at 1, but then
do not delete the IMAGENUM.txt file after that. Both the camera and GeoSnap will then
continue numbering between flights. However, if there is the need to reset numbering to 1 (e.g.
the IMAGENUM.txt was accidentally deleted off the GeoSnap card or image numbers hit 9999
and reset) then you need to synchronize the numbering again by deleting the IMAGENUM.txt
file and doing a Manual Reset on the camera’s file numbering to get both of them synchronized
back to 1.
Camera cycle time considerations
When using the GeoSnap to trigger your camera at a distance interval, the maximum ground
speed that should be allowed during your flight is a direct function of your desired trigger
distance interval and the cycle time of your camera. Every camera has a limit on how fast it can
take pictures (ranging from sub-second to over 4 seconds, depending on the camera), so, if you
are trying to take images at consistent distance intervals, you have to fly at a speed at which the
camera can keep up. The equation to use is:
𝑀𝑎𝑥𝑖𝑚𝑢𝑚 𝑔𝑟𝑜𝑢𝑛𝑑 𝑠𝑝𝑒𝑒𝑑 [𝑚/𝑠] =
𝑇𝑟𝑖𝑔𝑔𝑒𝑟 𝑑𝑖𝑠𝑡𝑎𝑛𝑐𝑒 𝑖𝑛𝑡𝑒𝑟𝑣𝑎𝑙 [𝑚]
𝐶𝑎𝑚𝑒𝑟𝑎 𝑐𝑦𝑐𝑙𝑒 𝑡𝑖𝑚𝑒 [𝑠]