What are GPS Coordinates?
GPS coordinates express a position on Earth — latitude, longitude, and often elevation — determined from satellite signals. In construction they anchor drawings, models, and captured imagery to real-world locations.
How It Works
GNSS receivers measure signals from multiple satellites to compute position → accuracy ranges from metres (consumer GPS) to centimetres with RTK/PPK corrections → captured data tagged with coordinates can be aligned to site coordinate systems.
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Applications in Construction & AEC
- Georeferencing drone maps and models
- Locating photos and inspections on site
- Machine control and stakeout
- Boundary and topographic surveys
- Linking field data to GIS systems
GPS vs. Site Coordinate Systems
GPS gives global coordinates; construction projects typically work in a local site grid. Transformation between the two — via control points and localisation — ensures captured data lines up with design drawings.
