GTrek II User Manual page 27

files, Ctrl+click for several files or Shift+click for blocks of files and then click Open . The
Google Earth image will zoom into the route(s) location.
2.
Click the Add Pictures button or select Import->Add Pictures from the menu, browse to
the location where the picture files are stored and select all that apply. If a picture is selected
it will be displayed and additional information on the picture will also be given.
3.
It is important at this stage to synchronize the time clocks of
the source material. The time clocks of the GPS data in the route
file is by default UTC or GMT and is accurate to a few thousandths
of a second, any adjustment made to the time zone data when
downloaded from your GTrek logger are ignored here. The time
which is set in the camera needs to be checked, working on the
assumption that your PC time is correct (if you are connected to
the internet this will be verified with an international time server)
your camera needs to be synchronized with it. Adjust the values in
the boxes until the Camera time displayed matches the time as
displayed on your camera. You may need to refer to your camera
manual to get this information. This will then correct any time zone
shifts and inaccuracies.
As an extra check take a picture whilst on the move of an object that can be recognized on
Google Earth (a road junction for instance) you can then check if this picture is in the right
place.
It is recommended that you leave the time setting on your camera unchanged while you are
away until at least you have GeoTagged your pictures. Guessing what your camera time was
set too afterwards would be difficult.
4.
Select the GeoCode button to save the GPS data to the images, nothing is saved to
the original files at this stage. The process takes each picture in turn and searches through
the route data to find the nearest date and time match. If this match is within pre-set limits
(see Settings below) then the GPS data is extracted from the route and inserted into the
picture file. The only problem is if you get the clock synchronization wrong all the pictures will
be in the wrong place !!. If you do get it wrong simple resynchronize the clocks and do it
again.
A trick that I have found useful here is to press the button on the logger when you take one of
the pictures and later see if the two line up. If you are traveling at 70mph and the clocks are
out by only 10 seconds the picture will be displaced by a quarter of a mile. All pictures in the
picture list will turn pink if a GeoCode match is found
5.
Selecting a suitable icon from the Icon Selection box and clicking the Icon adjacent to the
picture filename will change that icon to one selected.
6.
Selecting the Export to Google button will after requesting a location for the resulting
file export the route and the pictures in a single file.
7.
Selecting the Save GeoData button will save the new data back to the original file.
Import this picture file again at another time and select it will not only display it in the picture
area but will also place an icon on the Google Earth map and zoom in for a closer look.
8.
Selecting the Export to Google Earth icon will export the data, route and pictures into
Google Earth.
Manual Tagging
If a picture is can't be matched with a location in the route file or is tagged in an incorrect place it can
be manually tagged. Clicking the Manual Tagging button will cause the button to be highlighted
green. Use the left and right mouse buttons to pan and zoom the map or the navigation controls until
the required location can be seen on the map. Click and highlight the picture file name to be tagged,
hold down the Alt key and left-click the location on the map to tag the picture. The entry in the file list
© GTrek Ltd. 2013 Page 26 of 62 Version 5.4.0