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GPS unit: Garmin eTrex

  • Website: Produktseite official link
  • navigator (Navigation: )
  • CPU: (OS: ), Flash: (external: )
  • GPS: channels, ( , )
  • Display: , Connectivity:
  • Internal: Batteries: 2xAA
Addresses POIs
Mass Storage mode Yes check.svg Waterproof

Entry level 12 channel GPS. Bigger than the newer "Geko" model. The basic (yellow) model has no base map at all. Runs on a pair of AA batteries. There is an API for the serial port which can be used to download the trace record. An early version of the DNR Garmin Application supported this API which made it easier to download the trace info as a CSV file or to convert it to an ESRI compatible .SHP file. [[File:|thumb|Garmin eTrex H]]

Good Things

  • Pretty cheap.
  • One-handed use.
  • Suitably splashproof.
  • Very widespread, so well-supported for accessories (e.g. bike mount).

Bad Things

  • Not possible to upload (OSM)-map
  • No memory card slot, smallish memory. Cycling fills the track log at around 110km, after which the earlier parts of the log are overwritten. So complete mapping of rides above 110km is not possible.
  • The user has no control over the sampling interval on early models (firmware 2.x) at which it records tracklogs to its memory.
    • This is not quite the whole story. The early etrex doesn't have a preset "sampling interval" like (say) a Magellan. Instead, it uses an algorithm that samples more frequently when turning corners, less frequently when running in a straight line. This enables it to record much longer distances than might otherwise be expected of its (fairly low) 1500-point memory on early models (firmware 2.x). As an example, it is just about abl
specification despcription
Display 4 level gray LCD (64 x 128 pixels)
Display size 2.8 x 5.4 cm (1.1" x 2.1")
Interface serial
Slot No
Dimensions (W x H x D) 11.2 x 5.1 x 3.0 cm (4.4" x 2.0" x 1.2")
Weight 150 g (5.3 oz) with batteries
Battery 2 x AA / 22 hours
Ships with eTrex, Wrist strap, Owner's manual & Quick start guide
Misc IPX7



  1. eTrex® - specifications