The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLIII-B3-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 567–574, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-567-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2021, 567–574, 2021
https://doi.org/10.5194/isprs-archives-XLIII-B3-2021-567-2021

  29 Jun 2021

29 Jun 2021

THE POTENTIAL OF SENTINEL-1 DATA TO SUPPLEMENT HIGH RESOLUTION EARTH OBSERVATION DATA FOR MONITORING GREEN AREAS IN CITIES

A. Iglseder1, M. Bruggisser1,2, A. Dostálová1, N. Pfeifer1, S. Schlaffer1, W. Wagner1, and M. Hollaus1 A. Iglseder et al.
  • 1Department of Geodesy and Geoinformation, TU Wien, 1040 Vienna, Austria
  • 2Institute of Agricultural Sciences, ETH Zurich, 8092 Zurich, Switzerland

Keywords: Green area monitoring, Biotope classification, Habitats Directive, Sentinel 1, Airborne laser scanning, vegetation structure, Random Forest

Abstract. Green areas play an important role within urban agglomerations due to their impact on local climate and their recreation function. For detailed monitoring, frameworks like the flora fauna habitat (FFH) classification scheme of the European Union’s Habitat Directive are broadly used. By date, FFH classifications are mostly expert-based. Within this study, a data-driven approach for FFH classification is tested. For two test areas in the municipality of Vienna, ALS point cloud data are used to derive predictor variables like terrain features, vegetation structure and potential insulation as well as reflection properties from full waveform analysis on a 1 m grid. In addition, Sentinel-1 C-Band time series data are used to increase the temporal resolution of the predicting features and to add phenological characteristics. For two 1.3 × 1.3 km test tiles, random forest classifiers are trained using different combinations (ALS, SAR, ALS+SAR) of input features. For all model test runs, the combination of ALS and SAR input features lead to best prediction accuracies when applied on test data.