Cemeteries are absolutely some of the most challenging conditions in which to conduct geophysical surveys. No one geophysical survey instrument can detect all graves 100% of the time. Furthermore, graves may still be present even if no obvious signs of them are detected during the geophysical surveys. That said, and assuming the ground/site conditions allow for surveys to be done, multi-instrument geophysical surveys are the best approach for non-destructively identifying the presence of unmarked graves in cemeteries of any age.
On most projects, we use a variety of tools to help identify cemetery boundaries and locate lost graves:
- Geophysical Survey
- Old Aerial Photographs
- Historical Documents
- Detailed Field Mapping with a Laser Transit and GPS