Abstract:A 2013 survey of a 40 square kilometer area surrounding Mayapán, Yucatan, Mexico used high-density LiDAR data to map prehispanic architecture and related natural features. Most of the area is covered by low canopy dense forest vegetation over karstic hilly terrain that impedes full coverage archaeological survey. We used LiDAR at 40 laser points per square meter to generate a bare earth digital elevation model (DEM). Results were evaluated with comparisons to previously mapped areas and with traditional archaeological survey methods for 38 settlement clusters outside of the city wall. Ground checking employed full coverage survey of selected 500 m grid squares, as well as documentation of the chronology and detail of new public and domestic settlement features and cenotes. Results identify the full extent of continued, contemporary Postclassic settlement (A.D. 1150-1450) outside of the city wall to at least 500 meters to the east, north, and west. New data also reveal an extensive modified landscape of terraformed residential hills, rejolladas, and dense settlement dating from Preclassic through Classic Periods. The LiDAR data also allow for the identification of rooms, benches, and stone property walls and lanes within the city.

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One of the most distinctive features of the Postclassic capital of Mayapan is the immense wall that encloses large portions of the site's settlement zone. This 9.1 km-long feature is the largest example of a walled enclosure known in Mesoamerica. Based on ethnohistoric references, it seems that the construction was well known to Postclassic and Colonial period residents of the Northern lowlands. The most common assertion regarding the enclosures is that the wall had primarily defensive functions. Unfortunately, little solid archaeological evidence or cross-cultural comparison has been offered to support this interpretation. In this paper, I correlate the form of the gates with cross-culturally derived and unambiguously defensive features, finding that the design of the gates strongly suggests that they are indeed defensive. Possible secondary functions of the wall are also explored, such as the control of people and goods entering the city, as ritual barrier, the control of internal populations and its symbolism.