BenchMarkMap
The worldwide registry of geodetic reference points — trig stations, pillars, bench marks and GNSS monuments. Verify integrity in the field, add new points, or just find the nearest control for your next survey.
The world's open geodetic benchmark database
SurveyingPedia maintains an aggregated, queryable database of 639,570 geodetic reference points across 249 countries. Data is sourced from the US National Geodetic Survey, OpenStreetMap contributors, GeoNames, and the surveying community at large. All data is published under open licenses — see data licenses.
Use the search bar above the map to jump to any city, country or address. Pan and zoom to explore — at low zoom levels you'll see clusters showing benchmark density, at higher zoom individual points become clickable for details. Each point page contains coordinate formats (decimal, DMS, UTM), elevation, network attribution, satellite imagery, nearest neighbours, and links to the original agency datasheet.
How professional surveyors use this map
📐 Static GNSS sessions
Find the closest CORS station or trig pillar for static post-processing. Verify your RTK base position against a known monument.
🎯 Network densification
Plan traverses with a clear view of all surrounding control points. Export coordinates to your total-station controller via CSV.
📊 Cadastral verification
Cross-check coordinates from the official agency datasheet. Confirm horizontal/vertical datum before any legal-grade work.
🛰 RTK calibration
Calibrate your rover by setting up over a known geodetic monument. Compare measured vs. published coordinates as a daily QC step.
Community mapped
Every surveyor can add new points or verify existing ones. The map grows denser every week.
Field-verified
Photos and condition reports from surveyors on the ground. Know if a monument is intact before you drive there.
Global networks
IGM95 (IT), NGS (US), OSGB (UK), EUREF, IGN (FR/ES) and local networks — all in one map.
Free with account
Read public. Create account to add, verify and upload photos.