Terroir 2006 banner
IVES 9 IVES Conference Series 9 Remote sensing and radiometric techniques applied to vineyards in two regions of Rio Grande do Sul, Brazil

Remote sensing and radiometric techniques applied to vineyards in two regions of Rio Grande do Sul, Brazil

Abstract

The observation of Earth by satellites has demonstrated the feasibility of establishing differences between plant species, from their spectral features. The reflectance spectrum of vine plants follows this trend, being possible to identify vineyards in satellite images, among other species. However, identification at grape variety level is still to be investigated. This was presently addressed, using satellite multi-spectral images of two terroirs at Rio Grande do Sul State, Brazil. Spectral informations for 13 grape varieties (Cabernet-Sauvignon, Merlot, Semillon and others) were extracted from images collected by the ASTER sensor aboard Terra satellite, at 9 bands, with resolutions of 15 m at visible and 30 m at infrared. Field, radiometric measurements provided additional spectra. For one terroir, with vines in rows, 9-points spectra were constructed, each being the average of three plots of a given variety. These spectra are either polynomials, or sets of normalized intensities for the 9 bands. The other terroir, 500 km apart, has smaller plots in the traditional pergola style. Results point that: a) field measurements are compatible with orbital data; b) spectra for one variety, taken from three different plots, are mutually consistent; c) it is possible, from satellite images, to identify varieties, from their respective equations; d) the spectral information is coherent between both terroirs. It is concluded that middle resolution satellite images (pixel 15-30m), especially at infrared, are a valuable tool for surface measurements and grape variety identification, leading to multiple applications, including precision viticulture.

Download the PDF

DOI:

Publication date: December 22, 2021

Issue: Terroir 2006

Type: Article

Authors

Jorge Ricardo DUCATI and Patrícia RODRIGUES DA SILVA

Centro Estadual de Pesquisas em Sensoriamento Remoto e Meteorologia
Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 9500, Porto Alegre, Brazil

Contact the author

;

Keywords

remote sensing, ASTER images, image classification, radiometry, vineyard monitoring

Tags

IVES Conference Series | Terroir 2006

Citation

Related articles…

Un Système d’Informations à Références Spatiales sur le Vignoble. Un outil performant d’aide aux recherches sur la caractérisation des terroirs viticoles

The “Terroirs d’Anjou” project led by the Agronomy sector of the Vine and Wine Research Unit of the INRA center in Angers aims to characterize the viticultural terroirs in a study area which includes 29 municipalities in the Maine et Loire and cuts across the Anjou, Coteaux du layon and Coteaux de l’Aubance appellation areas.
Read More

Techniques for sunburn reduction in bunches in Vitis vinifera L. cv. Graciano

Sunburn results from a combination of excessive photosynthetically active radiation (PAR) and UV radiation and temperature that can be exacerbated by other stress factors such as water deficit. Sunburn is a physiological disorder that affects the visual and organoleptic properties of grapes. The appearance of brown and necrotic spots severely affects the commercial value of the fruit, and in extreme cases, significantly decreases yield. This damage occurs with some frequency in sensitive varieties such as Graciano.

Read More

«Promitheus» the new greek red wine grape arromatic variety

This paper presents is the create, the study and amplographic description the newGreek aromatic variety of red wine grapes “Promitheus”, created in 2012

Read More

Old but gold: the interest for minor grapevine varieties – a case study in the Veneto region (Italy)

The biodiversity of cultivated vines has been significantly reduced due to a series of factors that have favoured the cultivation of a limited number of varieties and clones over time. In veneto, since 1980, a series of important actions have been implemented to counter this process. These actions have focused on the conservation of germplasm identified in the territory and the recovery of varieties historically present in the region, which were in danger of being abandoned and disappearing.

Read More

Post-plant nematicide timing for northern root-knot nematode in Washington wine grapes

Vigor declines in older vineyards and poor vine establishment in replant situations have been attributed to plant-parasitic nematodes. The northern root-knot nematode, Meloidogyne hapla, is the most prevalent plant-parasitic nematode species found in Washington wine grape vineyards. Management for nematodes in established vineyards is limited to the application of post-plant nematicides. We are evaluating new nematicides that are currently not registered in grape for their efficacy in controlling M. hapla and a part of that evaluation includes improving the alignment of nematicide application timing with the vulnerable second-stage juvenile (J2) life stage of M. hapla.

Read More