Claims › Amazon & LiDAR lost cities › LiDAR shows Maya lowlands were far more densely settled than thought
LiDAR shows Maya lowlands were far more densely settled than thought
The claim: Airborne LiDAR has revealed tens of thousands of previously unmapped Maya structures, causeways and fields, including whole cities such as Valeriana (2024).
Why this label: Peer-reviewed LiDAR surveys since 2016 (Science 2018; Ancient Mesoamerica 2022; Nature 2020; Antiquity 2024) consistently show far more structures than ground survey had found.
Background
Although the Maya are in Central America rather than the Amazon, the same LiDAR revolution applies. The 2016 PACUNAM survey covered 2,144 km² of northern Guatemala. In the Mirador–Calakmul basin, LiDAR mapped Preclassic causeways and platforms. Aguada Fénix in Mexico, a huge raised platform built about 1000–800 BCE, was found by LiDAR. In 2024 a doctoral researcher reprocessed LiDAR collected for an environmental project and identified Valeriana in Campeche: 6,674 structures in the survey area, including a city covering about 16.6 km².
What has been measured
Dates, measurements and documented findings, kept separate from interpretation.
- 2,144 km² of northern Guatemala mapped, showing interconnected settlements, defences and causeways. [1]
- Aguada Fénix: the largest and oldest known Maya monument, c. 1000–800 BCE. [3]
- Campeche survey: 6,674 structures, including the newly identified city of Valeriana. [4][5]
- Mirador–Calakmul Karst Basin: dense Preclassic platforms and causeway networks. [2]
Evidence and arguments against, or limits
- LiDAR shows form, not date or occupancy. Population estimates from structure counts depend on assumptions. [1]
Open questions & what would change the label
How many structures were occupied at once, and how far back the Preclassic monumental tradition goes.
Sites
Sources
- Canuto, M. A. et al. (2018). Ancient lowland Maya complexity as revealed by airborne laser scanning of northern Guatemala. Science 361. doi:10.1126/science.aau0137 data
- Hansen, R. D. et al. (2022). LiDAR analyses in the contiguous Mirador-Calakmul Karst Basin, Guatemala. Ancient Mesoamerica. doi:10.1017/S0956536122000244 data
- Inomata, T. et al. (2020). Monumental architecture at Aguada Fénix and the rise of Maya civilization. Nature 582. doi:10.1038/s41586-020-2343-4 data
- Auld-Thomas, L. et al. (2024). Running out of empty space: environmental lidar and the crowded ancient landscape of Campeche, Mexico. Antiquity. doi:10.15184/aqy.2024.148 data
- INAH bulletin (2024). Dan a conocer Valeriana, un nuevo sitio arqueológico descubierto en la selva de Campeche. https://www.inah.gob.mx/boletines/dan-a-conocer-valeriana-un-nuevo-si… background
More in this section: Amazon & LiDAR lost cities.
Sources checked against Crossref and publisher pages on 2026-10-22. Labels describe the claim, not the people who hold it. Methodology.