GEOLOGIC AND GEOMORPHOLOGIC FEATURES APPLIED FOR IDENTIFICATION OF WINE TERROIR UNITS BY DIGITAL IMAGE PROCESSING, SPECTRORADIOMETRIC AND GIS TECHNIQUES - ENCRUZILHADA DO SUL, RS, BRAZIL

Sep 3, 2026

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Characterization of a new wine terroir unit in south Brazil is achieved by combining remote sensing, spectroradiometric analysis, and GIS-based terrain modeling. Study areas lie in Encruzilhada do Sul within the Serra do Sudeste viticultural region using SRTM, ASTER, and ALOS imagery plus field rock samples. Digital elevation models define slope, elevation, and solar exposure zones above 350 m. Spectroradiometry identifies minerals, links spectral responses to ASTER SWIR bands, and maps rock distributions, supporting terroir interpretation across studied wineries.

LanguageEnglish

CategoryPresentations

FormatPDF

Pages6

Reading Time2 min

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ABSTRACT

KEYWORD

INTRODUCTION

MATERIALS AND METHODS

Digital elevation models and cartography

GIS environment and zoning

Spectroradiometric analysis and mineral identification

RESUL

# GEOLOGIC AND GEOMORPHOLOGIC FEATURES APPLIED FORIDENTIFICATION OF WINE TERROIR UNITS BY DIGITALIMAGEPROCESSING,SPECTRORADIOMETRIC AND GIS TECHNIQUES INENCRUZILHADA DO SUL,RS,BRAZIL Rosemary Hoff¹,Jorge Ricardo Ducati²,Magda Bergmann(3) )Embrapa Uvae Vinha/CNPUVEmpresa Brasileira de Pesquisa AgropecuáriaRua Livamento,515-95700-000-Bento Gongalves-RS-Brailroehoffenpuv.embr apz br Centro Estadual de Pesquisasem Snoriamento Remotoe Meteorologia/CEPSEMUniversidade Federal do io Grande do Sul Av.Bento Gongalves,9500-91501-970-Porto Alegre-RS-Brasilducati@fufrgsbr Conmpanhia de Pesquisa de Recursos Minerais.CPRM-Servigo Geologico do BraslRua Banco da Provincis,105-CEP 90840-030-Porto Alegre-Brasilmbergmnn@pa.cprn.gov.br ## ABSTRACT Results in the characterization of a new wine terroir unit in south Brazil are reported.Presently,several areas in Brazil are being studied,in an effort to define new wine terroirsand improve the quality of Brazilian wines.This paper reports what is being done,byEmbrapa(Brazilian Agricultural Research Corporation)and its partners Remote Sensing andMeteorological Research Center(CEPSRMUFRGS)and Brazilian Geological Survey(CPRM),in the Encruzilhada do Sul region,at Rio Grande do Sul State,that is part of theSerra do Sudeste viticultural region.Satellite images from several sources(SRTM,ASTER,ALOS)were used,together with field data(rock samples).Digital elevation models were builtand used to define areas with slopes and solar expositions adequate to vine growing,withalcitudes above 350m.Spectroradiometry of rock samples was perfomed,to identify severalminerals(montmorilonite,illite,pyTophilite and kaolinite).Geologic maps were used to locaterock types to collected in field uips;those rocks had their spectral response extracted fromradiometry,and fitted to the six bands of ASTER SWIR subsystem,resulting in a map of thedistribution of these rocks in some areas of interest.Two wineries were more closely studiedThe first arez produces wine from 35 hectares of Cabermet Szuvignon,Merlot,Nebbiolo,Pinot Noir and Chardonnay.The other winery has 61 hectares and produces Pinot Noir andChardonnay grapes for sparkling wines.The study concludes that the use of remote sensingresources and associated geotechnologies are effective to terToir studies. ## KEYWORD Brazilian wines;geology;geomorphology,spectroradiomety,geographical informationsystem. ## INTRODUCTION In Brazil,spectroradiometric studies have been developed to characterize new viticulturalgeographic appellations,and for this effort,geotechnologies have been used by Embrapa andEmbrapa Grape and Wine Research Center(Centro Nacional de Pesquisas em Uva e VIII INTERNATIONALTERROIR CONGRESS Vinho/CNPUV)is located in Bento Goncalves,at Rio Grande do Sul State,at the mainBrazilian wine production region.One of the more promising new studied areas is locatednear Encruzilhada do Sul city,in Serra do Sudeste viticultural region (Figure 1).This area isdominated by extensive grasslands with minor forest patches developed over old Precambriantenains represented mainly by granitic-gnaissic rocks.Soils are mainly cambisolos andargisolos,poor in organic marter,well drained and occasionally gravely.The whole region ispart of the Pampa Biome (Embrapa 2008),which also covers large areas in neighboringUnuguay and Argentina. Figure 1.Location and vineyards in Encruzilhada do Sul,Brazil Vineyards for fine wines(Vinis vinifera)were first introduced around 1970,and presentlythere are more than 300 hectares with grapes such as Barbera,Cabermet Franc,CabernetSauvignon,Merlot,Periquita,Teroldego,Marselan,Pinot Noir,Ancelota,Malbec,TourigaNacional,Gamay,Arinamoa,Alicante Bouschet,Chardonnay.Gewirztaminer,Malvasia deCindia,Sauvignon Blanc,Riesling,and others.Such a large diversity of vineyards proves anongoing search for grape varieties that leads to a terToir identity.This identity,in fact,isalready suggested by Cemin and Ducati(2008),which detected spectral differ

FAQs

Which datasets were used to characterize the terrain and vineyard areas?

Satellite imagery from SRTM, ASTER, and ALOS was used to build digital elevation models. The study also relied on cartography and soil and geological maps produced by research institutions.

How were rock samples and mineral spectra used in the terroir identification process?

Rock samples collected in the field were analyzed with portable spectroradiometry and mineral identification software. Spectral signatures were degraded to match ASTER SWIR bands, enabling rock type identification on images.

What terrain criteria defined suitable zones for vine growing in the study?

Digital elevation models generated slope, elevation, and solar orientation maps. These integrated layers were used to select areas with appropriate slopes and solar expositions, focusing on altitudes above 350 m.

Sep 3, 2026

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