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Photogrammetric recording, modeling, and visualization of the Nasca Lines at Palpa, Peru : An overview

As part of a long-term project to investigate the cultural history of the Nasca region in southern Peru, the famous 
Nasca lines, or geoglyphs, have been documented since 1997 in a joint effort by archaeologists and geomatic engineers. The 
project aims on the one hand at a new interpretation of the geoglyphs based on solid field data. On the other hand, it is thought 
of as a contribution to the preservation of the geoglyphs. Prior to the start of the project, the geoglyphs had never been 
adequately recorded. In a new approach that combined aerial photogrammetry with archaeological fieldwork, we thoroughly 
documented more than 1 500 geoglyphs in the vicinity of Palpa. While different aspects of this work have been described in 
previous reports, this paper offers an overview of the technical procedures from data acquisition to processing, modeling, and 
visualization.