🇷🇴 🇵🇱 🇨🇿 🇸🇰 🇮🇹 🇩🇪 · 6 EU countries supported
Professional CRS
Conversion for
6 EU Countries
Engineering-grade coordinate conversion, measurements and mapping. Stereo 70, PUWG 1992, S-JTSK Křovák, Gauss-Boaga and ETRS89/UTM ↔ WGS 84 — tuned to each country's national grid.
Engineering-grade tools for surveying professionals.
SUPPORTED COUNTRIES
Six national grids,
one professional toolkit
Each country routes to its native projection with the right ellipsoid, false origin and datum transformation — so the numbers your client sees match the official grid, not a generic approximation.
Romania
Stereo 70 · EPSG:31700
Centimeter-level precision · Stereo 70 grid
Poland
PUWG 1992 · EPSG:2180
Sub-cm precision with national grid
Czechia
S-JTSK Křovák · EPSG:5514
Sub-cm precision · handles negative axis values
Slovakia
S-JTSK Křovák · EPSG:5514
Sub-cm precision · shared grid with CZ
Italy
Gauss-Boaga z2 · EPSG:3004
Engineering precision ±1–3 m · NTv2 grid not yet bundled
Germany
ETRS89 / UTM 32N · EPSG:25832
Sub-cm precision · UTM 33N available for east of 12°E
FEATURES
Complete topographic
toolkit, configured to you
Coordinate Conversion
Stereo 70, PUWG 1992, S-JTSK Křovák, Gauss-Boaga and ETRS89/UTM ↔ WGS 84 — dispatched automatically per active country.
Field Measurements
Distance, bearing, area and perimeter between surveyed points, computed on the projected national grid.
Slope Analysis
Slope angle, gradient and horizontal distance between two points, with elevation auto-filled from Mapbox terrain.
Import & Navigate
Bulk-import points from CSV or TXT, then open any point in Google Maps or Waze for turn-by-turn navigation.
Works Offline
Coordinate conversion and measurements run locally, no internet required. Online services (satellite maps, elevation lookup) light up when you have signal.
Privacy First
GDPR Consent Mode v2, default-deny before UMP, Italian Garante ad-personalization hardening, and no account required to use the app.
How it works
Professional results in seconds
Pick your country
Choose from RO, PL, CZ, SK, IT, DE. The app routes you to your national CRS automatically.
Enter coordinates
Type, paste from clipboard or capture from GPS. The math runs on-device for instant results.
Analyze in context
Analyze slope between two points with elevation auto-filled from Mapbox terrain, and explore high-resolution satellite imagery.
Export & share
Copy values, save to map, export PDF or KML and hand off to your team or your client.
FAQ
Frequently asked questions
Which countries are supported?
Romania (Stereo 70), Poland (PUWG 1992), Czechia (S-JTSK Křovák), Slovakia (S-JTSK Křovák), Italy (Gauss-Boaga zone 2 with UTM 32N/33N alternates) and Germany (ETRS89 / UTM 32N with UTM 33N for east of 12°E). The active country is set during onboarding and changeable from Settings.
How accurate is the conversion?
Sub-centimetre for PL/CZ/SK/DE (libproj with national grids), sub-metre for RO (hand-rolled Stereo 70 Helmert math), and engineering ±1–3 m for IT (NTv2 grid not yet bundled — accuracy disclaimer is shown in the app before purchase).
Does it replace a licensed surveyor?
No. TopoXY is an engineering-grade tool for surveying professionals — it accelerates daily fieldwork, but official cadastral submissions still require a licensed surveyor under each country's regulations (RO Law 7/1996, DE ÖbVI, IT Collegio dei Geometri, etc.).
Does it work offline?
Coordinate conversion is fully on-device. Online services (satellite maps, elevation lookup) require connectivity. The app is honest about this: you'll see which features need signal.
What data do you collect?
Coordinates and calculations stay on your device. We collect anonymous analytics and crash reports via Firebase only after GDPR consent (UMP). No personally identifiable info. See our Privacy Policy for the full processor list.
How do I cancel my subscription?
On your iPhone: Settings → [Your Apple ID] → Subscriptions → TopoXY Pro → Cancel. Cancellations take effect at the end of the current billing period.
Ready to ditch the spreadsheet?
Download TopoXY and convert like a pro across 6 EU countries.
Get TopoXY for iPhone