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…

What metabolomics teaches us about wine shelf life

The metabolomics era started about 22 years ago, and wine was one of the first foodstuff subjects of analysis and investigation by this technique.
Read More

Evaluation of the composition of pomace from grapes grown in the slopes of the Popocatépetl volcano (Puebla, Mexico). Feasibility of its application for obtaining functional foods

Grape pomace is the main byproduct generated during wine production and is primarily composed of skins and seeds, which are obtained after the pressing stage [1]. This byproduct retains a significant amount of nutrients, such as fiber, phenolic compounds, unsaturated fatty acids, vitamins, and minerals.

Read More

Influence of toasting oak wood on ellagitannin structures

Ellagitannins (ETs) have been reported to be the main phenolic compounds found in oak wood. These compounds, belonging to the hydrolysable tannin class of polyphenols, are esters of hexahydroxydiphenic acid (HHDP) and a polyol, usually glucose or quinic acid. They own their name to their capacity to be hydrolysed and liberate ellagic acid and they have an impact on astringency and bitterness sensation, which is strongly dependant on their structure. The toasting phase is particularly crucial in barrels fabrication and influences wood composition.

Read More

The effect of ecological conditions on the germination of pollen, fecundation and yield of some grapevine cultivars in Skopje region, Republic of Macedonia

The ecological conditions (climatic factors and soil) during the whole year, and especially before flowering and during the time of flowering, have a great influence on the functional ability of pollen, the pollination, the fecundation and the yielding potential of the cultivars of grapevine.

Read More

Genetic identification of 200-year-old Serbian grapevine herbarium

Botanist Andreas Raphael Wolny collected a grapevine herbarium from 1812-1824 in Sremski Karlovci (wine region of Vojvodina, Serbia), which represents local cultivated grapevine diversity before the introduction of grape phylloxera in the region. The herbarium comprises over 100 samples organized into two subcollections based on berry colour (red and white varieties), totaling 47 different grape varieties. The objective of this study was to investigate the historical varietal assortment of Balkan and Pannonian winegrowing areas with long viticulture traditions.

Read More