Wine producers often need to buy grapes from growers. A good selection of grapes allows obtaining the desired wine quality. This paper presents a procedure to obtain by means of earth observation techniques indices and parameters used in the Spanish vineyards to monitor the state of the grapes. In this way is possible to monitor the ripeness of the grapes or the best time to harvest in such a way that growers can get the highest quality grapes, while producers of wine can select the most appropriate characteristics for the type of wine they wish to produce

The work has been performed using IKONOS images and field data. The field data obtained regularly by chemical analysis are sugar, pH, total acidity, tartaric acid, malic acid, total anthocyans, anthocyans easily removable and weight of 100 berries. These data have been studied in relation to various indices obtained by remote sensing: NDVI, LAI, Green / NIR reflectances and so on, having obtained correlation indexes r²  between 0.7 and 0.9. As a final result of this work, the vineyards are classified into three categories using remote sensing techniques, according to the level in each one of them of the measured quantities: below average, on average and above average.