Survey work, measured and written down.
Technical insights and project stories from Trishunya's field teams — drone survey, DGPS, LiDAR, bathymetry, GPR and GIS across India.
🧮 740 Pacing vs Tape vs EDM: Live Distance Measurement Accuracy Test
Calibrate your own pace count with your phone's motion sensor, then compare pacing, tape/chain, and EDM distance measurement accuracy at any target distance.
🧮 710 Earthquakes, Tectonic Drift and Your Survey Control
See real earthquakes near you on a live map and calculate how tectonic drift has shifted your survey control since its ITRF epoch, roughly 5 cm a year in India.
🧮 751 Phone Camera vs Drone Photogrammetry: GSD Calculator
See why phone photos cannot replace survey grade photogrammetry. Adjust altitude, sensor size and focal length in a live GSD calculator and compare accuracy.
🧮 640 Geoid Undulation: DGPS Height vs Benchmark Elevation
A DGPS/GNSS height is measured from the WGS84 ellipsoid, not sea level. Use the live geoid undulation calculator, H = h - N, to find your benchmark elevation.
🧮 721 Tidal Datum Timing for Bathymetric Survey: Live Moon Tool
Calculate live moon phase, spring and neap tide timing, and see real NOAA tide data inside this bathymetric survey tidal datum planning tool for surveyors.
🧮 732 Barometric Elevation vs Survey Leveling Accuracy
A phone's barometric elevation reading drifts by metres as weather shifts, while survey leveling accuracy holds millimetres. Try the live stairwell calculator.
🧮 631 GPS vs RTK Accuracy: The DGPS Staircase on Your Map
See GPS vs RTK accuracy on your own live map: IP location, phone GPS, DGPS, and RTK-fixed accuracy circles shrinking from kilometres to two centimetres.
🧮 710 Live GPS Satellite Tracker: See Your Sky Right Now
Track real GPS, GLONASS and NavIC satellites live above your location with this GPS satellite tracker. See sky plot, PDOP, HDOP, VDOP from real CelesTrak data.
🧮 630 Magnetic Declination Live Test: Compass vs True North
Measure your own magnetic declination live by comparing a computed true bearing to your phone's compass heading, then watch it jump near steel or rebar.