Lidar data and the Izapa polity: new results and methodological issues from tropical Mesoamerica

Abstract

Light detection and ranging (lidar) and pedestrian survey are employed to document regional settlement patterns associated with the well-known center of Izapa in Chiapas, Mexico. Within an area of 47.5 km2, we located 413 previously undocumented mounds with associated time diagnostic artifacts. These mounds are the remains of both monumental architecture defining regional centers as well as domestic house mounds. This paper presents new data of overall occupation levels from the low hills zone that complements previously published patterns from the piedmont surrounding Izapa as well as eight newly documented Middle and Late Formative period (850 cal. bc–ad 100) monumental centers of various sizes that are coeval with Izapa. In addition to these substantive archaeological findings, the efficacy of lidar data acquired from two environmental zones (low hills and piedmont) are compared to evaluate how well Prehispanic mounds were detected under different vegetation covers. We conclude that the lower density of lidar collection from the low hills zone was as effective at detecting archaeological mounds as the higher density collection campaign used in the piedmont zone. The implication of these findings is that higher-density collection strategies may not always improve the documentation of archaeological features.