Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-7/W3, 31-37, 2015
https://doi.org/10.5194/isprsarchives-XL-7-W3-31-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
 
28 Apr 2015
Spectral Discrimination and Reflectance Properties of Various Vine Varieties from Satellite, UAV and Proximate Sensors
C. Karakizi, M. Oikonomou, and K. Karantzalos National Technical University of Athens, Remote Sensing Laboratory, Athens, Greece
Keywords: Precision agriculture, Viticulture, Spectral signatures, Classification Abstract. An assessment of the spectral discrimination between different vine varieties was undertaken using non-destructive remote sensing observations at the véraison period. During concurrent satellite, aerial and field campaigns, in-situ reflectance data were collected from a spectroradiometer, hyperspectral data were acquired from a UAV and multispectral data from a high-resolution satellite imaging sensor. Data were collected during a three years period (i.e, 2012, 2013 and 2014) over five wine-growing regions, covering more than 1000ha, in Greece. Data for more than twenty different vine varieties were processed and analysed. In particular, reflectance hyperspectral data from a spectroradiometer (GER 1500, Spectra Vista Corporation, 350-1050nm, 512 spectral bands) were calculated from the raw radiance values and then were correlated with the corresponding reflectance observations from the UAV and satellite data. Reflectance satellite data (WorldView-2, 400nm-1040nm, 8 spectral bands, DigitalGlobe), after the radiometric and atmospheric correction of the raw datasets, were classified towards the detection and the discrimination of the different vine varieties. The concurrent observations from in-situ hyperspectral, aerial hyperspectral and satellite multispectral data over the same vines were highly correlated. High correlations were, also, established for the same vine varieties (e.g., Syrah, Sauvignon Blanc) cultivated in different regions. The analysis of in-situ reflectance indicated that certain vine varieties, like Merlot, Sauvignon Blanc, Ksinomavro and Agiorgitiko possess specific spectral properties and detectable behaviour. These observations were, in most cases, in accordance with the classification results from the high resolution satellite data. In particular, Merlot and also Sauvignon Blanc were detected and discriminated with high accuracy rates. Surprisingly different clones from the same variety could be separated (e.g., clones of Syrah), while they were confused with other varieties (e.g., with Riesling).
Conference paper (PDF, 1273 KB)


Citation: Karakizi, C., Oikonomou, M., and Karantzalos, K.: Spectral Discrimination and Reflectance Properties of Various Vine Varieties from Satellite, UAV and Proximate Sensors, Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XL-7/W3, 31-37, https://doi.org/10.5194/isprsarchives-XL-7-W3-31-2015, 2015.

BibTeX EndNote Reference Manager XML