GeoPhotoUTM

Pablo Gomez

About this app

GeoFotoUTM records GPS coordinates, compass bearing, altitude, and device tilt into the EXIF metadata of every photograph. Geospatial information is embedded at capture time — no post-processing or manual transcription required.

Built for professionals and field technicians in archaeology, paleontology, environmental assessment, baseline studies, cadastral surveying, topography, geology, and biodiversity monitoring.

▸ Data recorded per capture

• GPS coordinates (latitude, longitude) with accuracy indicator
• Ellipsoidal altitude, with optional correction via elevation service
• Compass azimuth (magnetic or true north)
• 3D orientation: heading, pitch, and roll
• Automatic UTM conversion (zone, band, hemisphere)
• Timestamp with time zone
• Standards-compliant EXIF metadata

▸ Configurable overlay

Composites geospatial data onto the captured image. Each element has independent visibility, position, and styling:

• Coordinates, altitude, azimuth, tilt, date, and time
• Institutional logo and user-defined tags
• 12 compass rose variants
• Configurable typography, colors, backgrounds, borders, and opacity
• Exportable as .geofoto template for team-wide standardization

▸ Projects and organization

• Captures organized by project with metadata
• Gallery with filters by date, tags, favorites, and spatial selection
• Customizable file names with reorderable components
• Bulk rename
• Overlay restyle on existing photos without altering the original
• Side-by-side comparison: distance, time difference, altitude, and heading

▸ GIS tools

• Geometry import from KML, KMZ, and GPX
• Polygon editor with area calculation, perimeter, and centroid
• Waypoints and monitoring routes
• Spatial photo selection: by polygon, radius from point, or route corridor
• Track coverage analysis with suggested recapture locations
• Full project export to KMZ with embedded photographs

▸ Precision and capture control

• Averaged GPS to reduce position error
• Manual coordinate entry or map-based selection
• Calibratable compass with signal quality indicator
• Tap-to-focus with AF lock and exposure compensation
• Resolution profiles: Fast (9 MP), Balanced (16 MP), Quality (25 MP), Maximum (48 MP+)
• Simultaneous capture of clean and overlay photo

▸ Map projections

• WGS84 / automatic UTM based on position
• Presets: MAGNA-SIRGAS (Colombia), POSGAR 2007 (Argentina), SIRGAS-Chile 2021, CR05 (Costa Rica), GTM (Guatemala)
• Additional projections via EPSG/ESRI code or custom PROJ string
• Coordinates in decimal, DMS, and projected (E, N)

▸ Authenticity verification

Each photo can include a digital signature certifying it was not altered. Three modes: off, audit, and enforce. The system assigns a confidence level based on capture and verification conditions, with anti-replay protection and audit logging.

▸ Formats

• Coordinates: decimal, DMS, UTM, DMM, MGRS, UPS, Geo URI, WKT, Plus Code, Geohash, Maidenhead
• Images: JPEG with full EXIF
• Geodata: KML, KMZ, GPX
• Reference system: WGS84

▸ Privacy

All photos and metadata are stored exclusively on the device. No data is transmitted to external servers.

Available in Spanish and English. Android 11 or higher.

What’s new

Minor fixes.