Uncovering Memory: Mapping the Mass Grave at Dolores Cemetery

In April 2026, the Panteón Civil de Dolores in Mexico City became an interdisciplinary space for geospatial exploration and social justice. Mexico Flying Labs, in collaboration with the National Search Commission, the Mexico City Search Commission, and the Jalisco State Search Commission, deployed a DJI 300 RTK drone equipped with a LiDAR sensor to survey the largest mass grave in the country, an 8,000 m² area containing more than 18,000 bodies interred since the 19th century

After validating official permits and conducting ground inspections, aerial operations were carefully planned. Preliminary flights with a Mini drone were carried out to assess vegetation height and determine safe flight altitudes while avoiding collisions with dense trees. The resulting point cloud enabled the digital classification and removal of vegetation, revealing distinct areas of the grave and generating a three-dimensional model that complemented ground-penetrating radar surveys conducted by researchers at UNAM’s Institute of Geophysics. The flight was not merely a technical exercise, but part of a profoundly human mission: supporting search commissions in documenting and recognizing a place where memory and justice converge.

This technical work formed part of the second phase of the Controlled Recovery Plan. The Mexico City Search Commission reported the recovery of 25 individuals from Line 2BIS Grave 26 and 1,389 bone fragments, bringing the total to 50 individuals recovered in two sessions. The remains were transferred to the Institute of Forensic Services and Sciences for analysis and identification. So far, five (5) have been fully identified and six (6) more remain under examination. The spatial data obtained with drones not only guided the identification of critical zones but also strengthened territorial awareness in a space marked by history and grief.

This project demonstrates how geospatial technology, applied with rigor and sensitivity, becomes a tool for justice and reconciliation. The flight over Dolores was not simply an exercise in technical precision, but also a commitment to human rights — a bridge between science and the search for truth. In every point cloud and every fragment recovered lies the possibility of restoring identity to those still awaiting recognition, showing that drones, beyond their technological power, can serve as allies in the pursuit of justice and dignity.