preparation.md

@@ -0,0 +1,13 @@
+# Preparation for your trip
+Time. It's all about time here.
+
+Since the only common variable among all datasources is time, the tool can only work as precise as all the clocks are set during your photosession / trip. This includes timezones as `GPX` saves times in `UTC` along with the local timezone.
+
+## Camera
+Unless your camera has one of these shiny, integrated GPS receivers, you probably can't setup anything else from time. I always tend to live by the local timezone for obvious reasons, and so does the time on my devices. So `rad-tag.py` also assumes that timezone unaware devices use localtz.
+Good thing is, that the clock of the most consumer / prosumer devices does not drift too bad. Actually, in the past I set the time only once or twice per vacation.
+
+## Mobile Phone
+
+
+## Geigercounter