Geo Data Collector vs MeshTrail

Geo Data Collector turns your iPhone or iPad into an offline-first field GIS for mapping, asset inspection, structured data collection, surveying calculations, and construction layout job preparation. FIELD DATA COLLECTION • Capture points, lines, and polygons with attributes and photos. • Build forms in the app or import shareable JSON form designs. • Mark fields as required or optional and use text, number, date, checkbox, radio-button, and selection controls. • Review, search, edit, delete, and return to collected features on the map. EXTERNAL GNSS, RTK & NTRIP • Connect a compatible Bluetooth GNSS receiver that outputs NMEA 0183. • Stream validated RTCM 3 corrections from NTRIP v1/v2 RTN or CORS casters to the external rover. • Monitor fix type, receiver-reported accuracy, DOP, satellite count, signal quality, correction age, and data freshness. • Apply configurable quality gates, stable-fix checks, and ECEF/ENU point averaging before capture. • Preserve observations, occupations, antenna information, quality decisions, and available coordinate-operation provenance in versioned archives. The external receiver computes the RTK position solution. Achievable accuracy depends on the receiver, antenna, environment, correction service, configuration, and field procedures. SURVEYING & GEODESY TOOLS • Planar COGO inverse and forward calculations. • WGS84 geodesic inverse and direct calculations. • Polygon area, perimeter, orientation, and centroid. • Slope distance, grade, inclination, and elevation difference. • Stakeout deltas, Bowditch traverse adjustment, and angular-closure diagnostics. • WGS84 ECEF/UTM operations, explicit control localization, and auditable geodesy reports. CONSTRUCTION LAYOUT PREPARATION • Create and manage layout jobs and design targets. • Import targets from supported GeoJSON and CSV/ASCII point files. • Configure metric, international-foot, or US-survey-foot units and horizontal/vertical tolerances. • Build a 2D site localization from control pairs and review residual diagnostics. • Export as-built CSV, stake-report JSON, and Markdown field reports. OFFLINE MAPS & OPEN DATA • Work with GeoPackage, GeoJSON, raster MBTiles, and vector MBTiles. • Use online and offline basemaps, including vector, terrain/topographic, hillshade, satellite, and boundary layers where available. • Browse searchable attribute tables and control layer styling, visibility, opacity, and display order. • Convert supported vector formats, including zipped Shapefile, KML, GPX, CSV, and WKT, into app-ready data. FIELD OPERATIONS • Measure distance and area, record GPS tracks, search OpenStreetMap, save spatial bookmarks, and view coordinates in multiple formats. • Use offline field projects, field editing workflows, and geodesy/control reports. • Share files through supported cloud, FTP, WebDAV, and local Wi-Fi workflows. • Connect TAK Server and Meshtastic workflows for team position and messaging. Core collection and offline mapping do not require a proprietary server-side database. Some capabilities require compatible external hardware, network or correction services, imported data, or an in-app purchase. Geo Data Collector is a field mapping and construction aid. It does not replace a licensed surveyor, legal boundary determination, instrument calibration, or required professional quality-control procedures.

MeshTrail — Off-Grid Navigation & LoRa Mesh Communication Navigate the backcountry with confidence. MeshTrail combines GPS navigation, offline maps, LoRa mesh networking, and comprehensive field guides in one powerful app designed for hikers, hunters, anglers, and outdoor enthusiasts. Works 100% offline. NAVIGATION - Full offline map support with downloadable tile regions (Standard, Satellite, Hybrid, Topo) - GPS track recording with elevation profiles and pace tracking - Compass navigation with bearing-to-target guidance - Route planning with stops, difficulty ratings, and Naismith time estimates - Route following: step-by-step guidance with auto-advance, off-route alerts, and finish ETA - Tap anywhere on the map to drop a waypoint - AR peak identification using your camera HUNTING & PUBLIC LANDS - Public lands overlays: BLM and USFS boundaries - Colorado wildlife overlay: State Wildlife Areas, Walk-In Access, and Game Management Unit (GMU) boundaries — where hunters tag in - Tap any point in Colorado to see its GMU, county, public-access property, and elk/deer units - Comprehensive hunting guides with Colorado regulations and GMU references - Fishing guides with species, techniques, lures, and location tips - Step-by-step field dressing and game processing instructions - Solunar activity forecaster for hunting and fishing MESH NETWORKING - Connect to Meshtastic and MeshCore LoRa radios via Bluetooth - Send and receive text messages completely off-grid - See mesh node positions on the map in real-time - Monitor battery levels, signal strength, and telemetry data - Automatic position broadcasting to share your location with your group WILDLIFE FIELD GUIDES - 130+ North American species with high-quality photos - Detailed track and scat identification diagrams for field use - 100+ plants, trees, bushes, flowers, and mushrooms — browse by type, with edibility ratings, foraging tips, and dangerous-lookalike warnings SURVIVAL TOOLS - First aid protocols for 30+ emergency scenarios - SOS beacon with visual Morse code flashlight signal - Barometric weather monitoring with pressure trend analysis - Real-time river and stream gauge data from USGS NWIS - Radio frequency reference (Emergency, GMRS, Ham, CB, FRS) - Wind chill calculator with hypothermia risk assessment - Altitude sickness risk calculator - Avalanche danger assessment tool - Triangulation position fixing with compass bearings - Geologic basemap with rock-unit lookup powered by Macrostrat - Unit converter for distance, altitude, temperature, weight, and pressure MEDIA CENTER - Offline media player supporting audio, video, PDF, and ebooks - Wildlife sound library with 28 species calls - Bundled field reference library with classic outdoor and survival texts - Retro arcade games: Neon Snake, Neon Tetris, and a full isometric combat racer - Virtual pet companion with achievements and XP system Everything for safety and navigation — maps, mesh, SOS, weather, and the full field guide — is free. MeshTrail is free to download with one optional $2.99 Premium unlock that adds extra color themes, the AR star chart, arcade games, and the virtual pet. All data stays on your device.