How can I locate unmarked graves in an old cemetery without disturbing the ground?
Use high-frequency ground-penetrating radar (GPR) to scan the cemetery surface, then overlay the subsurface reflections on a precise GPS/GIS map. This non-invasive method detects unmarked grave shafts, outlines each burial plot, and creates a digital record—so you find every grave without digging or disturbing the soil.
Ground-penetrating radar cemetery surveys are the gold standard for unmarked grave detection because they read what lies below the turf instead of moving it. During a Sentry Mapping cemetery survey, technicians roll a high-frequency GPR cart across each walkway and row.
The antenna sends radio waves about 12 ft deep; when the signal hits a disturbed soil column (the signature of a grave shaft) it bounces back, creating a hyperbola visible on screen. We record every reflection with survey-grade GPS, then feed that data into our cemetery GIS mapping workflow. Within days you receive a digital cemetery mapping file that pinpoints each burial plot—marked or not—overlaid on recent drone imagery. Because the process is contact-less and lightweight, there is zero damage to headstones, landscaping, or fragile historic soil layers.
Beyond the map, you get a printed master plan, a searchable web map, and two free years of Chronicle cemetery management software. Staff can click any plot to view burial details, upload documents, or confirm availability before selling a space. This combination of GPR grave locating and intuitive software eliminates guesswork, prevents accidental disturbance, and preserves heritage while maximizing usable ground, all without a single shovel hitting dirt.