A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping
In this article we evaluate the application of Polynomial Texture Mapping (PTM), a technique within Reflectance Transformation Imaging (RTI), to a group of pre-Columbian rock art panels in southern Brazil. Our case study, the Avencal 1 rock art site (Urubici, Santa Catarina state), is one of the lar...
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doaj-b305f84e4ca24b1e945542e5892128442020-11-25T00:40:26ZengUniversity of YorkInternet Archaeology1363-53872015-02-013810.11141/ia.38.7 A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping Philip Riris0Rafael Corteletti1Archaeological Computing Research Group, Department of Archaeology, University of SouthamptonCentro de Estudos e Pesquisas Arqueológicas - CEPA, Departamento de Antropologia, Universidade Federal do Paraná In this article we evaluate the application of Polynomial Texture Mapping (PTM), a technique within Reflectance Transformation Imaging (RTI), to a group of pre-Columbian rock art panels in southern Brazil. Our case study, the Avencal 1 rock art site (Urubici, Santa Catarina state), is one of the largest and most recognised 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 when compared with preceding sketches. Furthermore, its utility as a prospection tool is underscored by revealing for the first time the existence of multiple eroded motifs. Interpreting the PTM data, we recognise several new aspects of the panels that have gone unnoticed. Discrepancies between the published plans and the panels are illustrated, as are hypothesised sequences of production for specific panels and multiple techniques of engraving used at Avencal 1. Following our study, it is clear that PTM has applications for both analysis and conservation of pre-Columbian rock art and beyond. This article is accompanied by the dataset produced from our project in Urubici, which is referred to extensively. The data files are hosted by the Archaeology Data Service.http://intarch.ac.uk/journal/issue38/riris_index.htmlPolynomial texture mappingrock artsouthern proto-Jêcomputational photographyBrazil |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Philip Riris Rafael Corteletti |
spellingShingle |
Philip Riris Rafael Corteletti A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping Internet Archaeology Polynomial texture mapping rock art southern proto-Jê computational photography Brazil |
author_facet |
Philip Riris Rafael Corteletti |
author_sort |
Philip Riris |
title |
A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping |
title_short |
A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping |
title_full |
A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping |
title_fullStr |
A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping |
title_full_unstemmed |
A New Record of Pre-Columbian Engravings in Urubici (SC), Brazil using Polynomial Texture Mapping |
title_sort |
new record of pre-columbian engravings in urubici (sc), brazil using polynomial texture mapping |
publisher |
University of York |
series |
Internet Archaeology |
issn |
1363-5387 |
publishDate |
2015-02-01 |
description |
In this article we evaluate the application of Polynomial Texture Mapping (PTM), a technique within Reflectance Transformation Imaging (RTI), to a group of pre-Columbian rock art panels in southern Brazil. Our case study, the Avencal 1 rock art site (Urubici, Santa Catarina state), is one of the largest and most recognised 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 when compared with preceding sketches. Furthermore, its utility as a prospection tool is underscored by revealing for the first time the existence of multiple eroded motifs. Interpreting the PTM data, we recognise several new aspects of the panels that have gone unnoticed. Discrepancies between the published plans and the panels are illustrated, as are hypothesised sequences of production for specific panels and multiple techniques of engraving used at Avencal 1. Following our study, it is clear that PTM has applications for both analysis and conservation of pre-Columbian rock art and beyond. This article is accompanied by the dataset produced from our project in Urubici, which is referred to extensively. The data files are hosted by the Archaeology Data Service. |
topic |
Polynomial texture mapping rock art southern proto-Jê computational photography Brazil |
url |
http://intarch.ac.uk/journal/issue38/riris_index.html |
work_keys_str_mv |
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