TopoWalk vs GNSS Planning Map

TopoWalk turns your iPhone into a GPS-guided land boundary walker. Load a trail file, walk the boundary, and watch waypoints turn green as you reach each one. WALK ANY BOUNDARY Load land parcels, property boundaries, or hiking trails from GPX, KML, DXF, and Shapefile formats. TopoWalk shows each waypoint on a satellite map with a yellow boundary line connecting them. GPS GUIDANCE Real-time distance to the next waypoint, off-trail warnings, and an audio chime when you arrive within 1 meter of each point. Never miss a boundary corner again. CONVERT BETWEEN FORMATS TopoWalk is the only app that converts between all major surveying and trail file formats. Import a KML cadastral map from a surveyor, convert it to GPX for your hiking app, export as DXF for AutoCAD, or save as Shapefile for GIS software. One tap to convert — no desktop software needed. Supported conversions: • GPX ↔ KML ↔ DXF ↔ Shapefile (SHP) • Import from email, Files app, or any cloud storage • Export and share in any format TRACK YOUR PROGRESS See how many waypoints you've visited, total distance walked, land area and perimeter calculations — all updating live as you walk. 44 WORLD LANDMARKS INCLUDED Explore boundaries of famous landmarks: Buckingham Palace, Taj Mahal, Vatican City, Stonehenge, Machu Picchu, Forbidden City, and many more — all with real satellite-accurate boundaries from OpenStreetMap. FREE FEATURES • GPX file support • GPS-guided walking with audio alerts • Progress tracking and distance display • 44 bundled world landmark trails TOPOWALK PRO (one-time purchase) • KML, DXF, and Shapefile import & export • Convert between all formats (GPX, KML, DXF, SHP) • Area and perimeter calculations • Share trails with others

GNSS Planning Map shows you, before you leave the office, when and where satellite geometry (DOP) will be good or poor. Drag a time-travel slider and watch a DOP heatmap turn green or red across the map — so you never arrive on site only to find the constellation is too weak to get a fix. Try every feature free for the first 30 days, right on your phone. [ Main features ] - DOP forecast heatmap: see how PDOP and the visible-satellite count change through the day across an area, from green (good) to red (poor). - Time-travel slider: jump to "next Thursday 14:30" and read the sky instantly. Orbits come from CelesTrak TLE with SGP4/SDP4 propagation. - Tap any point for an instant GO / NO-GO: PDOP, satellite count, and a per-constellation breakdown for that exact site and time. - Configurable rules: turn each constellation on/off (GPS, QZSS, GLONASS, Galileo, BeiDou, NavIC), set the elevation mask, minimum satellites and a PDOP limit. Nine built-in presets: GPS only, GPS + GLONASS, All GNSS, Public survey (JP), Survey / Cadastral, GIS / Mapping, Maritime / Navigation, UAV / Drone, Photogrammetry / 3D. - PDF work-order / evidence export: save a site and its recommended work windows as a one-page report. - Field-ready: once data is cached the forecast works offline. [ Who it is for ] Land surveyors, UAV / drone mapping and inspection teams, and GIS / infrastructure crews who plan RTK/PPK sessions and want to avoid wasted trips and reschedules. [ Honest notes ] The core forecast (orbits to DOP to heatmap) is global and works anywhere. This app is a planning aid based on orbital prediction; it does not guarantee field results — always verify on site. Terms of use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/