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Dear gps4cam users,

Here are the four most common mistakes submitted to the gps4cam support team. By knowing them and by reading the FAQ, you are ensured to have an optimal usage of gps4cam.

n°1 : The screenshot instead of the photo.
You have to photograph the generated QRCode(s) with the same camera you used during your trip. This is mandatory to automatically take into account the potential time shift between the camera time and the iPhone time. Please note that gps4cam cannot work with a screenshot of the QRCode.

n°2 : The trip that generates several QRCodes.
If the trip is long, several QRCodes may be generated during the export. In this case, you have to photograph every QRCodes. The number of dots under the QRCode allows to know the number of generated QRCodes. You can switch from one QRCode to another one by sliding your finger on the iPhone screen.

n°3 : Several trips in a same vacation.
Before gps4cam desktop V4.0:
It is possible to make several trips in a vacation and to use gps4cam desktop at the end of vacations. However, there is an important rule to respect in this case: always export and photograph the QRCode of a finished trip before starting a new one. If you try to export all your trips at the end of your vacations, it will be problematic since gps4cam does not look for QRCodes in photos which are in the timeframe of an already decoded trip (for performances reasons). If this rule was not followed, it is possible to make gps4cam desktop works fine, but you have to create one folder by trip and put photos of the trip and qrcodes of the trip inside.
After gps4cam desktop V4.0:
gps4cam desktop 4.0 offers three QRCodes search methods, that is why the preceding rule is not mandatory anymore. You can photograph all QRCodes of all your trips at the end and choose the corresponding method in gps4cam desktop preferences, or you can even manually select pictures where QRCodes are.

n°4: Camera time change during the trip.
A big advantage of gps4cam is that it is able to automatically manage the time shift between the iPhone time and the camera time without anything to do for the user. So please do nothing :-) . You must not change the camera time between the beginning of the trip and the moment you photograph QRCodes after export.

3 comments

  1. Ray Smith says: 9 August 2011

    I use gps4cam with my iPhone 3GS. I will be on vacation in some western states shortly where there will likely be no cell or data coverage. So my first question is will gps4cam work in that environment since I assume it uses the GPS satellite? My second question is about battery life. I have my gps4cam adjusted so it can go all day here at home on one battery charge, but when there is no cell or data coverage, that seems to run the battery down much quicker. Can I use Airplane Mode to avoid the battery drain for cell and data while still using gps4cam? If not, what would you suggest I do in this environment?

    Thanks

    Reply
    • Michael Diguet says: 10 August 2011

      Hello Ray,

      First of all, thank you very much for using gps4cam, I will do my best to help you :-) .
      Yes, gps4cam will work perfectly without any cell or data coverage. You won’t be able to see the map, but gps4cam will record your positions based on GPS signal.
      Do not use the airplane mode, it desactivates the GPS chip !! What I recommend instead is to reboot your iPhone and to not activate your sim card (click cancel when it prompts for your PIN code). This way, cell network is not activated at all and you will be very surprized by the battery consumption which is very low that way !!
      I wish you some beautiful photos with gps4cam.

      Warmest Regards, Michael Diguet

      Reply

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