Volume XLII-3
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3, 1381-1387, 2018
https://doi.org/10.5194/isprs-archives-XLII-3-1381-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-3, 1381-1387, 2018
https://doi.org/10.5194/isprs-archives-XLII-3-1381-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 Apr 2018

30 Apr 2018

COMPARISON OF VEGETATION INDICES FROM RPAS AND SENTINEL-2 IMAGERY FOR DETECTING PERMANENT PASTURES

M. Piragnolo1,2, G. Lusiani3, and F. Pirotti1,2 M. Piragnolo et al.
  • 1CIRGEO, Interdepartmental Research Center of Geomatics, University of Padua, Viale dell'Università 16, 35020 Legnaro, Italy
  • 2TESAF Department, University of Padua, Viale dell'Università 16, 35020 Legnaro, Italy
  • 3AVEPA, Agenzia Veneta per i Pagamenti in Agricoltura, via Niccolò Tommaseo 67/C 35131, Padova, Italy

Keywords: remotely piloted aircraft systems, RPAS, UAV, Sentinel-2, Copernicus, NDVI, vegetation indices, agricultural monitoring

Abstract. Permanent pastures (PP) are defined as grasslands, which are not subjected to any tillage, but only to natural growth. They are important for local economies in the production of fodder and pastures (Ali et al. 2016). Under these definitions, a pasture is permanent when it is not under any crop-rotation, and its production is related to only irrigation, fertilization and mowing. Subsidy payments to landowners require monitoring activities to determine which sites can be considered PP. These activities are mainly done with visual field surveys by experienced personnel or lately also using remote sensing techniques. The regional agency for SPS subsidies, the Agenzia Veneta per i Pagamenti in Agricoltura (AVEPA) takes care of monitoring and control on behalf of the Veneto Region using remote sensing techniques. The investigation integrate temporal series of Sentinel-2 imagery with RPAS. Indeed, the testing area is specific region were the agricultural land is intensively cultivated for production of hay harvesting four times every year between May and October. The study goal of this study is to monitor vegetation presence and amount using the Normalized Difference Vegetation Index (NDVI), the Soil-adjusted Vegetation Index (SAVI), the Normalized Difference Water Index (NDWI), and the Normalized Difference Built Index (NDBI). The overall objective is to define for each index a set of thresholds to define if a pasture can be classified as PP or not and recognize the mowing.