Data copyright © Philip Riris, Rafael Corteletti unless otherwise stated
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The Urubici Rock Art Project aimed to document pre-Columbian petroglyphs located in the Avencal 1 site (São Jaoquim National Park, Santa Catarina state, Brazil) using Polynomial Texture Mapping (PTM). In the associated article we evaluate the application of PTM in terms of information gain over traditional techniques. Avencal is one of the most recognised petroglyph sites in the southern Brazilian highlands. This study is the first detailed analysis of the site since it was recorded five decades ago. The record produced with PTM is more complete in comparison to preceding sketches. Furthermore, its utility as a prospection tool is underscored by revealing the existence of multiple eroded motifs for the first time. The site is one of the largest of several open-air petroglyph sites located within the Canoas watershed. The project was carried out by Rafael Corteletti and Philip Riris, with logistical support from the national park service of São Joaquim, as well as with some additional equipment lent by Marcelo Sabiá and Carolina Medeiros. Following our study, it is clear that PTM has applications for both analysis and conservation of pre-Columbian rock art.
A paper decribing the techniques used in creating this dataset has been published in Internet Archaeology:
Riris, P. and Corteletti, R. (2015). 'A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping', Internet Archaeology 38. https://doi.org/10.11141/ia.38.7