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Journal of Applied Remote Sensing

Evaluation of automated urban surface water extraction from Sentinel-2A imagery using different water indices
Author(s): Xiucheng Yang; Li Chen
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Paper Abstract

Urban surface water is characterized by complex surface continents and small size of water bodies, and the mapping of urban surface water is currently a challenging task. The moderate-resolution remote sensing satellites provide effective ways of monitoring surface water. This study conducts an exploratory evaluation on the performance of the newly available Sentinel-2A multispectral instrument (MSI) imagery for detecting urban surface water. An automatic framework that integrates pixel-level threshold adjustment and object-oriented segmentation is proposed. Based on the automated workflow, different combinations of visible, near infrared, and short-wave infrared bands in Sentinel-2 image via different water indices are first compared. Results show that object-level modified normalized difference water index (MNDWI with band 11) and automated water extraction index are feasible in urban surface water mapping for Sentinel-2 MSI imagery. Moreover, comparative results are obtained utilizing optimal MNDWI from Sentinel-2 and Landsat 8 images, respectively. Consequently, Sentinel-2 MSI achieves the kappa coefficient of 0.92, compared with that of 0.83 from Landsat 8 operational land imager.

Paper Details

Date Published: 13 May 2017
PDF: 11 pages
J. Appl. Rem. Sens. 11(2) 026016 doi: 10.1117/1.JRS.11.026016
Published in: Journal of Applied Remote Sensing Volume 11, Issue 2
Show Author Affiliations
Xiucheng Yang, ICube, Univ. of Strasbourg (France)
Li Chen, China Aero Geophysical Survey & Remote Sensing Ctr. for Land and Resources (China)

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