Discovering ancient Maya settlements using airborne radar elevation data

This report presents the results of using NASA/JPL airborne synthetic aperture radar data (AIRSAR) to detect ancient Maya settlements beneath jungle canopy in Guatemala. AIRSAR stands out from previous applications of radar remote sensing in the Maya lowlands because of its canopy-penetrating capabilities. The authors offer an overview of the AIRSAR technology, followed by a case study in which the AIRSAR data receive testing in the field. Reconnaissance in the region around the Maya site of El Zotz led to the discovery of two new sites, including the medium-sized settlement of La Avispa. AIRSAR also aided archaeologists in detecting zones of residential settlement around the site core of El Zotz. This research will serve as a guide for future applications of radar remote sensing in Maya archaeology.     

Evaluating the use of IKONOS satellite imagery in lowland Maya settlement archaeology

This article presents an extensive evaluation, in several contiguous or near-contiguous areas, of the viability of IKONOS satellite imagery in detecting sub-canopy Maya settlement in Peten, Guatemala. Initial research in and around San Bartolo, Guatemala, led to the conclusion that IKONOS imagery could be highly effective in detecting and predicting Maya settlement of the Preclassic and Classic periods, in zones of dense occupation near swampy lowlands known as bajos. The pioneering methods at San Bartolo are applied here to other regions in the Maya lowlands, but with mixed or unpromising results. Preliminary evaluation indicates that local climate, geology, hydrology, topography, pedology, and vegetation differ dramatically in these other regions, with consequences for wider application of the settlement signature discerned at San Bartolo. Possible reasons for these difficulties are offered in this paper, along with ways to strengthen the use of multispectral imagery in archaeological survey of tropical forests.     

Directional layouts in central lowland Maya settlement

This paper suggests the existence of non-random, directional patterns in the location of housemounds across the Late Classic Maya settlement landscape at Baking Pot, Belize, and then explores the wider implications of this patterning in the central Maya lowlands. It introduces an anisotropic method – based on nearest neighbour bearings and successive grid offsets – in order to explore possible rectilinear organisation in settlement layouts despite the presence of uneven and irregular patterns of archaeological dating and recovery. The results suggest a grid-like distribution of houseplots and, by implication, also a set of routes running throughout the housemound landscape and local Maya neighbourhoods during the site's Late and Terminal Classic history. Furthermore, different possible alignments in different parts of the site are tentatively regarded as an indication of shifting orientations to localised grids, following the shift in alignment of monumental architecture, as the settlement landscape expanded over time. Finally, we discuss the implications of these findings with respect to the broader interpretation of Maya settlement patterns.     

Caracol,Belize, and Changing Perceptions of Ancient Maya Society

Archaeological research at Caracol, an ancient Maya site that was rediscovered in 1937, has become a major resource in the interpretation and understanding of the ancient Maya. Caracol, in west-central Belize, is situated in a subtropical region once characterized as being unsuitable for the development or maintenance of complex societies, yet it is one of the largest, if not the largest Classic period Maya site in the southern Maya Lowlands, home to over 100,000 people at its height between AD 600 and 700. The investigations at Caracol underscore the utility of long-term archaeological projects incorporating large-scale settlement study that combine excavation with varied research designs and the use of a contextual approach. By employing Maya epigraphic history, traditional archaeology, and modern technology like LiDAR, research at Caracol details the rise, maintenance, and fall of an ancient Maya city, affording a large window into ancient Maya lifeways. Archaeological work provides evidence of sustainable agriculture, a market economy, city planning that included a road system, the impact of warfare on the site’s inhabitants, the sociopolitical status of women, the role that archaeology can play in refining written history, and the significance of commemorating the cyclical passage of time to the ancient Maya. This article summarizes archaeological research efforts at the site by the Caracol Archaeological Project over the last three decades.     

Investigation of past archaeological landscapes using remote sensing and GIS: a multi-method case study from Mount Ida,Crete

Spatial analysis in geoarchaeological applications can be improved by implementing a wider set of geoecological parameters, in order to provide more precise results. The aim of the paper is to show how geoscientific ground-truth and techniques can be adopted for detailed archaeological studies using a comprehensive set of environmental variables that might have influenced ancient settlement patterns. The project focuses on spatial patterns of archaeological sites as well as Bronze Age communication paths in Central Crete by applying a multi-method approach (surveying, remote sensing, DEM analysis, least-cost analysis, candidate site detection, predictive modelling, etc.). In contrast to conventional archaeological GIS applications this enhanced strategy offers promising prospects regarding landscape and settlement modelling.     

Identifying integrative built environments in the archaeological record: An application of New Urban Design Theory to ancient urban spaces

Ancient Maya settlement patterns have long been described as dispersed. Instances of low-density or dispersed urbanism among agrarian-based societies are common in tropical civilizations, and are of particular interest due to their expressed problem of social integration. Traditionally, archaeologists have focused on classic hallmarks of state integration, including force, infrastructural control, large-scale ritual, and kinship; thus, reflecting the polar extremes of integration. Current models accord a more multi-scalar and dynamic nature to state and urban organization, and the need to pursue diachronic perspectives that consider more subtle and varied degrees of integration. With regard to settlement, examining the total patch of occupation on a landscape, how it developed, how it was divided up, and in turn brought together, is of interest. In this study I apply criteria developed in New Urban Design Theory, a body of thought and practice concerned with modern-day issues of dispersed and low density settlement, to evaluate an architectural complex at the Classic Maya centre of Buenavista del Cayo, Belize, believed to have functioned as an integrative space within the civic entity.     

The fractal geometry of ancient Maya settlement

Ancient Maya settlement patterns exhibit fractal geometry both within communities and across regions. Fractals are self-similar sets of fractional dimension. In this paper, we show how Maya settlement patterns are logically and statistically self-similar. We demonstrate how to measure the fractal dimensions (or Hausdorff–Besicovitch dimensions) of several data sets. We describe nonlinear dynamical processes, such as chaotic and self-organized critical systems, that generate fractal patterns. As an illustration, we show that the fractal dimensions calculated for some Maya settlement patterns are similar to those produced by warfare, supporting recent claims that warfare is a significant factor in Maya settlement patterning.     

The spatial and temporal dimensions of a rural landscape: the Yucatec Maya k'ax

This article presents a case study of rural landscape concepts found in the indigenous Yucatec Maya area of Mexico. Of particular interest in this article is the contrast between the Maya conceptualization of the forest as essential to sustainable agriculture and a Western notion of the forest as the antithesis of agriculture. The former has created a tropical forest that is a product of Maya management and the basis of a sustained Maya society, whereas the latter leads to practices that destroy this forest producing a non-sustainable system. Cyclical landscape processes in the former contrast with linear landscape processes in the latter. In order to compare and contrast the landscapes, a model that identifies embedded concepts is used. It is proposed that the Maya system has an element of verticality and temporality leading to sustainability, a feature lacking in the Western conceptualization.     

Imagined homeland: landscape painting in Palestine in the 1920s*

Abstract. This essay examines the proposition that landscape representations both reflect and endorse national ideology. By studying in detail selected landscape paintings by Jewish artists in pre‐State Israel some of the assumptions linking landscape and nationalism will be revisited. In particular, I shall challenge received notions in Israeli art historiography that interpret the numerous landscape paintings of the 1920s as directly expressing the identification with Zionism – the Jewish national movement. Analysis of the subject repertoire reveals that artists usually ignored images of the Zionist settlement in Palestine. They preferred instead to depict oriental countryside or ancient cities in an emblematic idealistic manner supported by stylistic borrowings from contemporary French painting. The country in these paintings is more an idea than a reality. Yet they evoke neither the biblical past nor a Zionist futuristic vision, but rather an oriental Arcadia of an unspecified time.     

Peonage, Power Relations, and the Built Environment at Hacienda Tabi, Yucatan, Mexico

The social and material conditions of postcolonial haciendas in Yucatan, Mexico, were greatly influenced by power relations intrinsic to the institution of debt peonage. Although landowning elites exercised enormous control over debt peons, hacienda social relations involved continuous negotiation between master and servant. Recent investigations at Hacienda Tabi, a sugar hacienda in southern Yucatan, explore the interplay between power relations and the creation and maintenance of the built environment. The evidence from Tabi suggests that during the Porfiriato (1876–1911) hacendados manipulated the settlement landscape to emphasize an order of social inequality. The spatial and structural elements of the hacienda's settlement reflected and supported the owners' attempts to control resident peons. However, those attempts were challenged by the resident Maya community, who defined the hacienda landscape imposed on them in alternative ways.     

Genesis,age and archaeological significance of a pedosediment in the depression around Tell Mozan,Syria

A pedosedimentological profile from the ditch surrounding the lower town of the Bronze Age site of Mozan is investigated for its soil and sedimentological characteristics and has been dated in order to gain information on the use of the ditch and on the landscape development surrounding the settlement. The depression did not contain large amounts of water (flowing or stagnant) and probably was used for agricultural purposes. Accumulation – that in part includes anthropogenically-derived, redeposited, and bioturbated debris – started at around 2800 cal. BC or later, and was especially intensive at some time between 2800 and 1000 cal. BC. Deposition may have been caused by intensive agricultural use of the landscape during the urban explosion of the Early Bronze Age or in the early Middle Bronze Age.     

Mapping ancient chinampa landscapes in the Basin of Mexico: a remote sensing and GIS approach

This paper uses remote sensing data to document a raised field, chinampa system adjacent to the Postclassic kingdom of Xaltocan in the northern Basin of Mexico. Various forms of landscape information; historic records and maps as well as remote sensing; are considered to understand the chinampa system. The remote sensing data examined include 1950s aerial photographs, Landsat 7 data, and Quickbird VHR, multi-spectral imagery. This article evaluates the utility of each of these forms of data to identify buried chinampa features and integrates them in a GIS to produce a map of Xaltocan's chinampa landscape. Canals of various sizes and hydrological positions comprised the chinampas and integrated the system together. Occupying at least 1500–2000 ha, Xaltocan's chinampa system represents the largest pre-Aztec, chinampa system in the Basin of Mexico.     

Site and Community at Chunchucmil and Ancient Maya Urban Centers

Abstract

Classic Period lowland Maya urban centers often lack sharp boundaries due to progressive dispersal of residential settlement. This dispersal gives rise to questions about the concept of site and the notion of community affiliation. Research on settlement patterns at Chunchucmil, an urban center in NW Yucatan, Mexico, dating to the 5th and 6th centuries A.D., explores the issue of site boundaries and the social and economic implications of such boundaries. Detailed mapping, test pitting, and reconnaissance reveal that Chunchucmil had three densely occupied, concentric, contemporaneous zones of settlement covering between 20 and 25 sq km and inhabited by a population of up to 42,500. Data from both within and beyond the density thresholds marking the edge of the city imply the existence of communities whose boundaries do not always follow those of the site. A portion of the hinterland settlement close to the edge of the city shows stronger economic and social connections with the city, for example. These connections enable the delineation of Greater Chunchucmil, extending 5 km from Chunchucmil's center. The work at Chunchucmil also allows comparison with other large Maya cities that have been systematically documented. This comparison highlights considerable variability in Maya urban forms and in how these cities relate to their peripheries.     

Integrating Multi‐Sensor Remote Sensing Data for Land Use/Cover Mapping in a Tropical Mountainous Area in Northern Thailand

Accurate mapping of land use/cover conditions provides essential information for managing natural resources and is critical for further examination of land use/cover change and its subsequent impacts on the environment. Remote sensing offers a means of acquiring land use/cover data in a timely manner, with optical remote sensing images commonly being used in land use/cover related studies. The persistent cloud cover during the rainy season in Southeast Asia, however, presents a challenge for using optical images in land use/cover mapping. Integrating multi‐sensor images of different spectral domains is thus desirable because more information can be extracted to improve the mapping accuracy. The purpose of this study is to assess the potential of using multi‐sensor data sets for land use/cover mapping in a tropical mountainous area in northern Thailand. Optical data from Landsat Thematic Mapper, radar images from Advanced Land Observing Satellite/Phased Array type L‐band Synthetic Aperture Radar (PALSAR), and topographical data were used, providing complementary information on land use/cover. Classification and accuracy assessment were conducted for 12 different combinations of the data sets. The results suggested that short crop mapping using multi‐temporal Phased Array type L‐band Synthetic Aperture Radar images offered insights into the distributions of crop and paddy fields. Because of the mountainous environment of the study area, combining topographic data of elevation and slope into the classification greatly reduced the confusion between different land use/cover types. Improvement of classification accuracy was evident especially in separating evergreen and deciduous forests from other vegetation types and discriminating urban village and the fallow field classes.     

Integrating LiDAR data and conventional mapping of the Fort Center site in south-central Florida: A comparative approach

Abstract

Publicly available LiDAR (Light Detection and Ranging) data provide a potential windfall for archaeologists, permitting the creation of detailed topographic site maps with little more than an internet-connected computer and appropriate software. The quality of these LiDAR data for site mapping is variable, however, and may need to be supplemented with data obtained from conventional mapping techniques. We share insights from recent mapping of the Fort Center site (8GL13) in southern Florida. Specifically, we suggest a method—based on trial and error—for integrating LiDAR and total station survey data. We compare the results of our work with previous efforts at mapping the site based solely on conventional archaeological survey methods, as well as with results based on LiDAR data alone. We conclude that our combination of LiDAR data, corrected by conventional survey data, produces the most accurate map.     

Evaluation of very high to medium resolution multispectral satellite imagery for geoarchaeology in arid regions – Case study from Jabali,Yemen

Archaeological research of the ancient Jabali silver mines (7th to 14th centuries ad) in northern Yemen is a multidisciplinary project covering scientific disciplines traditionally related to archaeology, a geological approach and new technologies such as very high resolution remote sensing. Mining companies envisage the development of the Jabali deposit for zinc ore. Some of the planned facilities, particularly a large open pit, will have a destructive impact on the old pits and processing heaps, already damaged by recent works. In the present study, remote sensing is used for a detailed survey of the impact of preliminary mining works from the early 1980’s with the aim to establish archaeological remains and to prioritize areas for future ground surveys, as well as for geological mapping. Results indicate that mapping using remote sensing in the visible to short wave infrared range has a great potential for the identification of gossans (iron caps) possibly related to archaeological remains. The phases of work in Jabali are clearly put into light by the study of a time series of Landsat data. Very high resolution QuickBird imagery appears particularly relevant for mapping most of the archaeological remnants, iron caps, as well as the 3D visualization of the mining site when drapped over a detailed digital elevation model.     

Protrusion, Bioturbation, and Settlement Detection during Surface Survey: The Lowland Maya Case

In upland settings in humid and semihumid temperate and tropical environments, bioturbation is a major factor in the burial of modest architectural remains, which are abundant components of the settlement systems of complex societies. Surface survey, favored by archaeologists of complex societies as a settlement detection method, seldom is appropriate for discovering architectural remains buried through bioturbation. Where the focus of analysis includes settlement represented by architectural remains, surface survey is appropriate only where all or a representative sample of all types of architectural remains are protrusive. Protrusion describes a relationship (affected by climate, environment, topography, and cultural variables) between the height of a ruined building and the depth of the biomantle, which is the zone of bioturbation. To enable archaeologists to assess the appropriateness of settlement detection procedures, including surface survey, I propose a scheme that classifies architectural remains in terms of their protrusion, building height, and visibility characteristics. The scheme can be employed to determine if and why architectural remains are protrusive in particular study areas. To demonstrate its analytical utility, I apply the scheme and the model of building burial through bioturbation that underlies it to the problem of Maya invisible settlement. I conclude that in the Maya lowlands of Mesoamerica, building remains buried through bioturbation are a more abundant settlement category than many archaeologists have supposed.     

New views on an old forest: assessing the longevity, resilience and future of the Amazon rainforest

The aim of this paper is to investigate the longevity and diversity of the Amazonian rainforest and to assess its likely future. Palaeoclimate and palaeoecological records suggest that the Amazon rainforest originated in the late Cretaceous and has been a permanent feature of South America for at least the last 55 million years. The Amazon rainforest has survived the high temperatures of the Early Eocene climate optimum, the gradual Cenozoic cooling, and the drier and lower carbon dioxide levels of the Quaternary glacial periods. Two new theories for the great diversity of the Amazon rainforest are discussed – the canopy density hypothesis and the precessional-forced seasonality hypothesis. We suggest the Amazon rainforest should not be viewed as a geologically ephemeral feature of South America, but rather as a constant feature of the global Cenozoic biosphere. The forest is now, however, entering a set of climatic conditions with no past analogue. The predicted future hotter and more arid tropical climates may have a disastrous effect on the Amazon rainforest.     

Tracing Settlement Patterns and Channel Systems in Southern Mesopotamia Using Remote Sensing

Abstract

The integration of spatial datasets from historical satellite imagery, digital elevation models (DEMs), and past archaeological surveys provides new insights into the nature and remains of past landscape transformations. Using southern Mesopotamia as a case study, this article addresses, both quantitatively and qualitatively, long-held assumptions concerning the nature and relationship of settlement patterns and river channel systems in antiquity. GIS and image analysis are used to fill in gaps in the settlement record and propose a revised location for the Tigris River during most of antiquity. Given that only one-third of the central alluvial plain had been ground surveyed in southern Mesopotamia, how complete was our picture of landscape and settlement? How could gaps in settlement be interpreted? The present work in the area east of Baghdad suggests that archaeologists and historians have underestimated the nature and movements of the Tigris River. Satellite imagery can help reveal the location of the Tigris River prior to its settling into its modern course, shedding light on its potential role in the rise of early Mesopotamian agricultural societies. The work presented here proposes a methodology for unweaving and mapping preserved pieces of ancient landscapes, addressing larger issues of human modification of the landscape.     

Flights into the past: full-waveform airborne laser scanning data for archaeological investigation

Airborne Light Detection and Ranging (LiDAR) is a quite recent (mid-1990s) remote sensing technique used to measure terrain elevation. Recent studies have examined the possibility of using LiDAR in archaeological investigations to map and characterize earthworks, to capture features that may be indistinguishable on the ground and to aid the planning of archaeological excavation campaigns.