Survey GeoLink — Bridging Your Site Grid to Global Coordinates
Read your live GNSS fix as UTM and save it as a point, work out distances and bearings, set out new points, solve triangles and move coordinates in and out as CSV, KML or KMZ. Built for field surveyors — and it works with no signal at all.
Everything You Need in the Field
Eight modules in one app — everything in version 0.4.0 runs locally on your phone. No signal, no subscription, no sign-up.
Projects
Create and manage survey projects — every site with its own settings.
- Six regional presets: International, Europe, North America, Middle East, Pakistan, India
- Per-project units, UTM zone & accuracy limit
- Client, site and surveyor details
- Duplicate, archive, search and sort
- Stored locally on your device
Live Coordinates
Your current GNSS fix, converted to UTM, with one-tap Save Point.
- Latitude/longitude in decimal degrees and DMS
- UTM easting / northing + EPSG code
- Auto zone & hemisphere detection
- Elevation and accuracy badges
- Mock-location and zone-mismatch warnings
- Save Point straight into the active project
Saved Points
Review the points captured on site, project by project.
- Easting / northing and lat/long side by side
- Elevation, accuracy and capture time on every point
- Names and notes to identify each point
- Re-use any point in Points & Bearings
- Send the whole list to Export
Points & Bearings
Distance and bearing between points, and setting out new ones.
- ΔE / ΔN and horizontal distance between two points
- Grid bearing (azimuth) from point A to point B
- Set out a new point from a known point, bearing and distance
- Pick saved points or type coordinates
- Results in the project’s linear units
Triangle Solver
Base, perpendicular, hypotenuse and angles — solved on the spot.
- Enter any two of base, perpendicular and hypotenuse
- Returns the missing side and both angles
- Squaring corners, offsets and diagonals in the field
- Metres or feet, matching the project
Import
Read coordinates from CSV, KML or KMZ into a project.
- CSV and TXT with flexible column mapping
- Delimiter auto-detection
- KML and KMZ placemarks — straight from Google Earth
- Lat/long or UTM input, metres or feet
- Points land in the project you choose
Export
Save your points to CSV, KML or KMZ and take them anywhere.
- CSV for the total station and office software
- KML / KMZ for Google Earth
- UTM or geographic values, metres or feet
- Share through any app on your phone
Converter
Coordinates, units and land measures — all in one place.
- Latitude/longitude ↔ UTM with manual zone override
- DD ↔ DMS ↔ degrees-decimal-minutes
- Length: mm, cm, m, km, in, ft, yd, mi, feet-and-inches
- Area: m², ft², yd², acre, hectare, cent, marla, kanal
- International or US survey foot
Also on the bottom bar: a Compass tab with live magnetic heading and exact UTM grid convergence, and Settings for the optional PIN lock, default units and the marla definition.
Regional Presets, Global Coverage
Pick a preset and the app sets sensible unit defaults — every value stays editable.
International
Metric and fully configurable. The default — works anywhere in the world.
Europe
Metres and millimetres for dimensions, hectares for area.
North America
Decimal feet and acres, with the US survey foot available.
Middle East
Metres and millimetres, square metres for area.
Pakistan
Feet-and-inches drawings, marla and kanal areas with configurable marla size.
India
Decimal feet or metres, cent and acre land measurement.
Specifications
What the engine actually supports, verified against published reference coordinates.
| App version | 0.4.0 — Projects, Live Coordinates, Saved Points, Points & Bearings, Triangle Solver, Import, Export, Converter |
|---|---|
| Datum | WGS 84 |
| Projection | UTM — all 60 zones, both hemispheres, including the Norway and Svalbard grid exceptions |
| EPSG codes | 32601–32660 (north), 32701–32760 (south), generated automatically |
| Coordinate formats | Decimal degrees, degrees-minutes-seconds, degrees-decimal-minutes |
| Linear units | Millimetre, centimetre, metre, kilometre, inch, decimal foot, feet-and-inches, yard, mile |
| Area units | Square metre, square foot, square yard, acre, hectare, cent, marla, kanal |
| Marla definitions | 272.25, 250 and 225 sq ft presets, plus any custom value |
| Foot standard | International foot (default) or US survey foot, selectable per project |
| Field calculations | ΔE/ΔN, horizontal distance and grid bearing between two points; set-out of a new point from bearing and distance; right-triangle solver (base, perpendicular, hypotenuse, angles) |
| File formats | CSV, TXT, KML and KMZ — import and export, both directions |
| Compass | Magnetic heading from device sensor; UTM grid convergence computed from position and zone; declination user-supplied |
| Storage | Local database on the device. Converted files are held in app cache and cleared automatically after 24 hours |
| Platform | Android. Requires location permission for GNSS features |
Please read — accuracy. Mobile GNSS coordinates are intended for approximate georeferencing and map alignment. Relative survey dimensions and levels should remain based on total-station observations or approved survey control. Compass headings come from the device magnetometer and are affected by nearby metal and magnets. Survey GeoLink is a companion tool — it is not a replacement for survey-grade GNSS, RTK or gyro instruments.
Your Data Never Leaves Your Device
Not a policy promise alone — the released app does not even request internet permission.
No Data Collection
No accounts, no analytics, no advertising, no crash reporting and no cloud sync. Nothing you capture is sent anywhere.
No Internet Permission
The release build does not declare the internet permission at all, so your coordinates physically cannot be transmitted.
Optional PIN Lock
Lock the app on a shared device. The PIN is stored only as a salted hash — never in readable form.
You Control Deletion
Delete projects in-app, or uninstall to remove everything. Files you export elsewhere are yours and are never touched.
Coming to Survey GeoLink
Planned for future versions — on the roadmap, not in 0.4.0 yet.
Get Survey GeoLink
Version 0.4.0 · Free to use, no account required. Android phones and tablets.
18 downloads so far · Free · Android
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