Have questions? We have answers

Yes. GPR cemetery surveys are completely non-invasive: the radar cart rolls across the turf without touching monuments, and the radio waves are lower power than a cell-phone call. Sentry Mapping’s process leaves the soil, turf, and even the most fragile 1800s marble or sandstone headstones untouched.

Yes. High-frequency ground-penetrating radar can still pick up century-old graves in most soils because disturbed soil layers, vault remnants, or voids remain detectable. While resolution fades as coffins decay, Sentry Mapping’s specialized GPR and GIS workflow regularly finds 19th-century burials and older, as long as site conditions (soil, depth, moisture) are reasonable.

Sentry Mapping uses non-invasive high-frequency Ground Penetrating Radar (GPR) to scan every square foot of the site. This allows us to detect soil disturbances that mark burials, GPS-tag each hit, then publish the results on an interactive GIS cemetery map. The entire survey is completed without any form of excavation, preserving the historic grounds.

Sentry Mapping’s cemetery mapping service instantly turns ground-penetrating radar and high-precision GPS survey data into a clean, scalable cemetery map. Every grave—including unmarked burials—appears in its exact location, and plot boundaries are redrawn automatically, giving you an accurate master map plus an interactive online version within a few days to a few weeks depending on the size of your cemetery.

Sentry Mapping provides a free, no-obligation estimate for each project. Every property is unique and the exact cost varies with soil type, terrain, tree cover, and record condition. Quotes include full GPR coverage, high-precision GPS positioning, drone imagery, and the conversion of raw scans into a color-coded digital cemetery map with printed and interactive deliverables.