Barometric Altimeter for Geology
Track your elevation using barometric pressure — more accurate than GPS altitude in the field. GeoKit's altimeter provides real-time altitude readings, pressure trend graphs, manual calibration, and vertical statistics for geological fieldwork.
Download FreeAltimeter Capabilities
Real-time Altitude
Continuous elevation reading using the barometric pressure sensor. Updates every second with smoothing to filter out noise.
Pressure Trend Graph
Visual pressure history graph helps you spot weather changes and understand how atmospheric conditions affect your readings.
Manual Calibration
Set a known elevation to calibrate the altimeter. Essential for barometric accuracy when weather fronts shift local pressure.
Vertical Statistics
Track total ascent, total descent, min/max altitude, and session duration — useful for logging elevation changes across a traverse.
Barometric Altitude vs. GPS Altitude
GPS altitude is derived from satellite triangulation and typically has an accuracy of ±10–30 meters. For geological fieldwork — where elevation differences of a few meters matter — this isn't precise enough.
Barometric altimeters use atmospheric pressure to calculate altitude and achieve ±1–3 meter accuracy when properly calibrated. That's why professional altimeters in aviation, mountaineering, and geology rely on barometric pressure.
GeoKit uses your phone's built-in barometer (available on most modern smartphones) to deliver this precision for free — no external hardware required.
Altimeter Use Cases in Geology
Traverse Logging
Record elevation changes as you walk a transect. Vertical stats give you total ascent/descent automatically.
Stratigraphic Sections
Measure bed thickness using elevation differences. The barometer captures fine-grained altitude changes that GPS misses.
Marker Elevation
Every geological marker you drop in GeoKit includes barometric altitude — tied to GPS coordinates and field notes.
Track Elevation in the Field — Free
Download GeoKit and start using the barometric altimeter on your next geological traverse.