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1. Detecting Classic Maya Settlements with Lidar-Derived Relief Visualizations

   https://doi.org/10.3390/rs12172838  

   Thompson, Amy E. ( September 2020 , Remote Sensing)

   null (Ed.)

   In the past decade, Light Detection and Ranging (lidar) has fundamentally changed our ability to remotely detect archaeological features and deepen our understanding of past human-environment interactions, settlement systems, agricultural practices, and monumental constructions. Across archaeological contexts, lidar relief visualization techniques test how local environments impact archaeological prospection. This study used a 132 km2 lidar dataset to assess three relief visualization techniques—sky-view factor (SVF), topographic position index (TPI), and simple local relief model (SLRM)—and object-based image analysis (OBIA) on a slope model for the non-automated visual detection of small hinterland Classic (250–800 CE) Maya settlements near the polities of Uxbenká and Ix Kuku’il in Southern Belize. Pedestrian survey in the study area identified 315 plazuelas across a 35 km2 area; the remaining 90 km2 in the lidar dataset is yet to be surveyed. The previously surveyed plazuelas were compared to the plazuelas visually identified on the TPI and SLRM. In total, an additional 563 new possible plazuelas were visually identified across the lidar dataset, using TPI and SLRM. Larger plazuelas, and especially plazuelas located in disturbed environments, are often more likely to be detected in a visual assessment of the TPI and SLRM. These findings emphasize the extent and density of Classic Maya settlements and highlight the continued need for pedestrian survey to ground-truth remotely identified archaeological features and the impact of modern anthropogenic behaviors for archaeological prospection. Remote sensing and lidar have deepened our understanding of past human settlement systems and low-density urbanism, processes that we experience today as humans residing in modern cities. 

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2. Ancient Lowland Maya neighborhoods: Average Nearest Neighbor analysis and kernel density models, environments, and urban scale

   https://doi.org/10.1371/journal.pone.0275916  

   Thompson, Amy E. ; Walden, John P. ; Chase, Adrian S. ; Hutson, Scott R. ; Marken, Damien B. ; Cap, Bernadette ; Fries, Eric C. ; Guzman Piedrasanta, M. Rodrigo ; Hare, Timothy S. ; Horn, Sherman W. ; et al ( November 2022 , PLOS ONE)

   Hart, John P. (Ed.)

   Many humans live in large, complex political centers, composed of multi-scalar communities including neighborhoods and districts. Both today and in the past, neighborhoods form a fundamental part of cities and are defined by their spatial, architectural, and material elements. Neighborhoods existed in ancient centers of various scales, and multiple methods have been employed to identify ancient neighborhoods in archaeological contexts. However, the use of different methods for neighborhood identification within the same spatiotemporal setting results in challenges for comparisons within and between ancient societies. Here, we focus on using a single method—combining Average Nearest Neighbor (ANN) and Kernel Density (KD) analyses of household groups—to identify potential neighborhoods based on clusters of households at 23 ancient centers across the Maya Lowlands. While a one-size-fits all model does not work for neighborhood identification everywhere, the ANN/KD method provides quantifiable data on the clustering of ancient households, which can be linked to environmental zones and urban scale. We found that centers in river valleys exhibited greater household clustering compared to centers in upland and escarpment environments. Settlement patterns on flat plains were more dispersed, with little discrete spatial clustering of households. Furthermore, we categorized the ancient Maya centers into discrete urban scales, finding that larger centers had greater variation in household spacing compared to medium-sized and smaller centers. Many larger political centers possess heterogeneity in household clustering between their civic-ceremonial cores, immediate hinterlands, and far peripheries. Smaller centers exhibit greater household clustering compared to larger ones. This paper quantitatively assesses household clustering among nearly two dozen centers across the Maya Lowlands, linking environment and urban scale to settlement patterns. The findings are applicable to ancient societies and modern cities alike; understanding how humans form multi-scalar social groupings, such as neighborhoods, is fundamental to human experience and social organization. 

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3. Magnetic Gradiometry Survey at the Urban Centre of Türkmen‐Karahöyük (Turkey)

   https://doi.org/10.1002/arp.1955  

   Creamer, Petra M. ; Alperstein, Jonathan ; Massa, Michele ; Osborne, James ; Casana, Jesse ( September 2024 , Archaeological Prospection)

   The understanding of urban centres in the ancient Near East, one of the main regions for investigating the development of cities, has been transformed in recent years through investigations using archaeological geophysical prospection tools. This paper presents results of our recent magnetic gradiometry survey at the large urban site of Türkmen‐Karahöyük (Konya Plain, Turkey) conducted using a SENSYS Magneto MXPDA cart‐based system. Results of the survey have successfully identified and characterized numerous areas of ancient settlement, industrial activity and burials across the massive site, offering new insights into the history of occupation at Türkmen‐Karahöyük. Our findings are thereby helping to shape future investigations at the site and, more broadly, demonstrate the opportunities and challenges presented by cart‐based geophysical survey instruments for archaeological investigations of mounded urban sites with extensive lower towns.

    

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4. Evaluating the Archaeological Efficacy of Bathymetric LiDAR across Oceanographic Contexts: A Case Study from Apalachee Bay, Florida

   https://doi.org/10.3390/heritage6020051  

   Hale, Jessica W. ; Davis, Dylan S. ; Sanger, Matthew C. ( February 2023 , Heritage)

   This study presents preliminary results from recent bathymetric LiDAR-guided surveys of submerged archaeological landscapes in the Apalachee Bay off the coast of Florida. We show how bathymetric LiDAR can re-identify previously recorded archaeological sites and identify new cultural deposits at shallow depths and help aid SCUBA surveys of submerged environments. While most prior archaeological applications of bathymetric LiDAR have focused on shipwrecks and historic era sites, our case study demonstrates that bathymetric LiDAR is capable of detecting Holocene and Pleistocene era archaeological sites as well. Detecting and eventually characterizing these ancient deposits will greatly expand our understanding of settlement trends when sea levels were lower and may provide insights into how some of the earliest coastal populations adapted to this novel and changing environment. Our SCUBA surveys also elucidate the impact of local environmental conditions of the applicability of deploying bathymetric LiDAR; specifically, eel grass cover does not hinder LiDAR capabilities, while high rates of sedimentation greatly reduce success in identifying archaeological deposits. Overall, our results show promise in the future of applying remote sensing to study shallow submerged archaeological landscapes, which can help improve our understanding of human–environment dynamics prior to and during periods of sea level change. 

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5. CITADELS AND SURVEILLANCE: CONFLICTIVE REGIONS AND DEFENSIVE DESIGN IN THE BUENAVISTA CITADELS OF GUATEMALA

   https://doi.org/10.33547/cnwa.13.01  

   Houston, Stephen ; Garrison, Thomas ; Alcover Firpi, Omar Andrés ( December 2019 , Contributions in New World Archaeology)

   Maya conflict left many images. With a few exceptions, however, they reveal limited numbers of victors and captives In contrast, glyphic accounts point to broader convulsions, and the challenge remains of linking such conflicts to the infrastructure of concerted attack and defense. Lidar, a technology using laser pulses to record and model surfaces, does so with aplomb. By now, most Mayanists accept that, in the late 4th century A.D., Classic Maya kingdoms became entangled with the distant polity of Teotihuacan, Mexico. Tikal refers to that encounter in precise detail, identifying an enigmatic, victorious belligerent, Sihyaj K’ahk’, and possible ruptures in the local dynasty. To unexpected extent, lidar shows that the western entry to Tikal bristled with numerous citadels, surveillance platforms, moats with protected settlement, and ramps for rapid ascent and descent on high ridges and hilltops. Current evidence places these features in the general time of Sihyaj K’ahk’, underscoring that the threat and actuality of violence enmeshed regions, at systemic scale. 

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