TerrainHub vs Field Sentinel Mapper

222,000+ US sites. 14 categories. Gold, hot springs, fossils, caves, waterfalls, and more — for prospectors, rockhounds, fossil and meteorite hunters, hikers, overlanders, landscape photographers, and anyone with an interest in geology. MINERALS & FOSSILS Gold (125k), Precious Metals (14k), Fossils (29k), Rockhounding (663), Meteorites (1.7k). Filter gold sites by prospecting status — active claims, closed claims, historic deposits, fee digs. Filter rockhounding by material type — gemstones, quartz, agates, petrified wood. WATER FEATURES Natural Springs (35k), Hot Springs (2.3k), Waterfalls (11k), Swimming Holes (660). GEOLOGIC FORMATIONS Caves (1.3k), Natural Arches (722), Rock Pillars (419), Slot Canyons (283), Sand Dunes (136). AI GUIDE — ASK ANYTHING ABOUT THE LAND Unlike a regular AI chat, AI Guide checks real government survey data at your exact location — geology, land management, mining claims, soil chemistry, fault lines, and more. Use the pick location on map feature to scout any area and get a full breakdown before you visit. · Text Q&A — Ask about geology, prospecting potential, land rules, or anything about the area. · Photo Identification — Photograph a rock, mineral, or formation. AI Guide cross-references what it sees with the local geology. · Video Analysis — Record a short video and get a breakdown of terrain and formations. Multiple angles reveal what photos can't. · Explore with Kids — Ask AI Guide to explain geological features in simple terms. Turn a family hike into an educational adventure. 17 MAP LAYERS BLM, National Forest, National Parks, State Parks, Wildlife Refuges, Nature Preserves, Wilderness Areas, Streams & Rivers, Lakes & Reservoirs, Active Mining Claims, Closed Mining Claims, PLSS Survey Grid, Rock Types, Soil Geochemistry, Stream Sediment, Fault Lines, Volcanic Features. Private Land Parcels and LiDAR Hillshade coming soon. FIELD TOOLS Waypoints, Field Notes, GPS Camera, Compass, Magnifier, Distance Line, Draw Area, Location Sharing, Import/Export GPX, and more. Offline maps — download regions before you lose service. FREE TO EXPLORE Start exploring for free. Upgrade to PRO for AI Guide, offline map downloads, and geology and mining layers. SUBSCRIPTION DETAILS TerrainHub PRO unlocks AI Guide, offline map downloads, and PRO map layers (Mining Claims, Geology). - TerrainHub PRO Monthly — $9.99/month - TerrainHub PRO Yearly — $89.99/year (save 25%) TerrainHub PRO+ includes everything in PRO plus higher monthly AI Guide limits - TerrainHub PRO+ Monthly — $19.99/month - TerrainHub PRO+ Yearly — $179.99/year (save 25%) All subscriptions include a 7-day free trial. Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Privacy Policy: https://terrainhub.app/privacy-policy Terms of Use: https://terrainhub.app/terms

Field Sentinel is a professional geospatial platform for iPhone and iPad, built for teams who work where connectivity is unreliable or unavailable. Whether you support defense operations, emergency response, surveying, construction, aviation, or remote field research, Field Sentinel puts maps, GIS tools, and intelligence workflows on a single device—fully offline when you need it. WORK WITHOUT THE NETWORK • Render offline maps from GeoPackage, MBTiles, and PMTiles • Run spatial queries with SpatiaLite against local feature data • Design and edit schemas, tables, domains, and relationships in GeoPackage • Collect field data with XLSForm-compatible forms and barcode scanning • Import and export KML, KMZ, GPX, GeoJSON, Shapefile, and more PROFESSIONAL MAP & GIS EDITING • Snap-aware vertex editing with split, merge, reshape, and erase tools • Digitize points, lines, and polygons directly on live map layers • Redline annotations, symbols, and labels with GeoJSON/KML export • Terrain analysis including viewshed, slope, elevation, and 3D terrain viewing • GDAL-powered format conversion for raster and vector data ON-DEVICE AI ASSISTANT • AI chat and report drafting powered by local language models • Natural-language spatial queries against your map data • Image analysis for terrain and damage assessment from photos • Document Q&A from PDFs and field documents—processed on your device SITUATIONAL AWARENESS & COMMUNICATIONS • Team Awareness Kit (TAK) client with Cursor-on-Target messaging • GeoChat, mission packages, and live position sharing when connected • Fleet and asset tracking with proximity alerts • Optional integration with TAK Server for team coordination FIELD OPERATIONS MODULES • Surveying: COGO, traverse, leveling, area/volume, and GNSS/RTK support • Construction: earthwork, CAD/DXF overlay, BIM/IFC viewing, and PDF reports • Aviation: FAA charts, airspace layers, TFRs, flight planning, and NOTAMs • Emergency management: ICS/NIMS forms, CAP alerts, and damage assessment tools • Intelligence workflows: GEOINT analysis, change detection, and multi-source fusion BUILT FOR THE FIELD Field Sentinel is optimized for iPad and iPhone in portrait and landscape. Store tile packages, models, and databases on device. Generate professional PDF reports in the field. Use split-screen workspace tools for documents, notes, and annotations alongside your map. Field Sentinel is developed by Tech Maven Geospatial—bringing enterprise GIS, tactical awareness, and on-device intelligence to operators at the edge. Privacy: Core workflows run on your device. Network access is optional and used only for features you enable, such as TAK Server sync, chart downloads, or imagery updates. Questions or enterprise licensing: contact Tech Maven Geospatial.