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Identification of roof materials in high-resolution multispectral images for urban planning and monitoring

Braun, Andreas and Warth, Gebhard and Bachofer, Felix and Hochschild, Volker (2019) Identification of roof materials in high-resolution multispectral images for urban planning and monitoring. 2019 Joint Urban Remote Sensing Event (JURSE), 22.-24. May 2019, Vannes, France. DOI: 10.1109/JURSE.2019.8809026 ISBN 2642-9535

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Abstract

While the application of very high-resolution imagery is widely acknowledged, the use of sensors of spatial resolutions of five meters and above is constrained in urban settings because of limitations due to the mixed pixel information. This study investigates the potential of Sentinel-2 products for the detection of roof materials in the city of Kigali as input for planning decisions and monitoring of urban expansion. A linear spectral unmixing is applied to spectral information of both artificial and natural surfaces collected in the field. Results indicate that both spatial and radiometric resolution are sufficient to detect even small fractions of roof materials, although a proper calibration and endmember optimization is required. Challenges remain regarding surfaces of similar spectral signatures, such as clay roofs and argillaceous soil, and surfaces which are strongly under-represented within pixels. The spatial distribution of clay roofs as an indicator for upper-class houses matches the reference data collected in the fields, but for a reliable prediction of all materials more attention must be placed on metal roofs of different colors.

Item URL in elib:https://elib.dlr.de/128957/
Document Type:Conference or Workshop Item (Speech)
Title:Identification of roof materials in high-resolution multispectral images for urban planning and monitoring
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Braun, Andreasan.braun (at) uni-tuebingen.dehttps://orcid.org/0000-0001-8630-1389
Warth, Gebhardgebhard.warth (at) uni-tuebingen.deUNSPECIFIED
Bachofer, FelixFelix.Bachofer (at) dlr.dehttps://orcid.org/0000-0001-6181-0187
Hochschild, Volkervolker.hochschild (at) uni-tuebingen.deUNSPECIFIED
Date:2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1109/JURSE.2019.8809026
Page Range:pp. 1-4
ISBN:2642-9535
Status:Published
Keywords:spectral unmixing, urban remote sensing, roof materials, urban planning, Sentinel-2
Event Title:2019 Joint Urban Remote Sensing Event (JURSE)
Event Location:Vannes, France
Event Type:international Conference
Event Dates:22.-24. May 2019
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Remote sensing and geoscience
Location: Oberpfaffenhofen
Institutes and Institutions:German Remote Sensing Data Center > Land Surface Dynamics
Deposited By: Bachofer, Dr. Felix
Deposited On:03 Sep 2019 15:25
Last Modified:03 Sep 2019 15:25

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