Use the DP GPS module to navigate and position in the field and directly with your DP computer caliper.



The DP GPS module and corresponding software application will enable you to position and navigate with your computer caliper, at the same time as you perform your regular fieldwork. When assembled on the DP terminal com-port you will hardly notice this GPS module that is controlled through the DP caliper, operated with and by the caliper battery and that stores data in its memory. 

The DP GPS has a 33 channel receiver and supports several different satellite systems such as GPS (US), GLONASS (Russian), Galileo (EU) and GZSS (Japan). The DP GPS also supports correction using SBAS: WAAS (American), EGNOS (European) and MSAS (Japanese) which will improve positioning in difficult terrain. The accuracy reaches up to 2.5 m in open terrain, and algorithms predict satellite positions for up to 3 days using data from the latest configurations for up to a month in the DP GPS.


Depending on which application you are using in your DP computer caliper, there are different possibilities for your fieldwork. Position sample plots and/or stock points, set coordinates for positions with special nature concern and for individual trees.

Set location for timber stacks alongside roads and improve your overall logistics, or make a track log of stock borders or the entire estate with your caliper and have it calculate the area. Or – why not preload data to your caliper and navigate with the DP II and DP GPS to special areas or individual trees.Versatility is great and possibilities are many!

Computer caliper software

  • Collect measuring data and connect data with positions on sample plots, stand areas, areas with special biotops, individual trees, and roadside timber loads.
  • Make a tracking log of borderlines in a plot and have the DP caliper calculate the total area.
  • Preload positions for marked trees and hazard trees, navigate straight to them.
  • Revisit an area, and instantly find your way.
Size 57x30x30mm, 2.28”x1.2”x1.2”.
Weight 25g, 1oz.
Satellite systems Host-based multi-global navigation: GPS(Usa)/GLONASS (Russia)/Galileo(EU)/QZSS(Japan). SBAS Satellite-based augmentation systems: WAAS(USA), EGNOS(EU), GAGAN(India), MSAS(Japan)
Orbit prediction Built in self-generated (Faster TTFF up to 3days)
Geodetic date WGS84
Protocol NMEA. Messages: GGA: Time, position and fix type data
GLL Lat, long, UTC time of position fix and status
GSA GNSS receiver operating mode, satellite used and DOP values
GSV Number of satellites in view ID numbers, elevation, azimuth and SNR values. RMC: Time, date, position, course and speed data.
VTG Course and speed information relative to the ground
Performance data Receiver type 33 tracking/99 acquisition- channel GNSS receiver. Update rate 1Hz (max 10Hz).
Sensitivity Tracking: -165 dBm-. Reacquisition: -160 dBm
Cold starts -147 dBm. Time-To-First-Fix: (All SV @ –130 dBm)
Cold starts 28s up to 15min (open sky)
Warm starts 26s (open sky)
Hot starts <1s (open sky, <2h since last start)
Accuracy Automatic Position. 2.5m CEP (circular error probable) (50% 24 hr static, -130dBm)
Speed 0.1m/s. (50%@30m/s)
Temperature -40° ~+85° C
Electrical data Power supply 2.8~4.3V. Power consumption @ 3.3V (typical)
Acquisition 35mA. Tracking: 30mA. Backup:14uA
  • Built in jamming removing. Built in rechargeable backup memory.
  • DP II requires Bios V2.16 and forward.
  • Digitech Professional I requires Bios V1.73 and forward.