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Settlement detection and impervious surface estimation in the Mekong Delta using optical and SAR remote sensing data

Leinenkugel, Patrick und Esch, Thomas und Künzer, Claudia (2011) Settlement detection and impervious surface estimation in the Mekong Delta using optical and SAR remote sensing data. Remote Sensing of Environment, 115 (12), Seiten 3007-3019. Elsevier. DOI: 10.1016/j.rse.2011.06.004.

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Offizielle URL: http://www.sciencedirect.com/science/article/pii/S0034425711002288

Kurzfassung

Information about the extent of impervious surface and its rate of development is a valuable indicator of urban growth and environmental quality and thus relevant for a wide range of research related to urban ecosystems. Using SPOT-5 data from 2005 to 2009, impervious surface was estimated at a subpixel level for the area of Can Tho province in the Mekong Delta, based on a Support Vector Regression model. Training data comprised a set of SPOT-5 reflectance values each associated with an individual value of subpixel imperviousness as their respective labels. The latter were obtained on the basis of a land cover map, which in turn was derived from a pansharpened QB subset by means of an object-oriented image classification approach. In addition, by varying different sets of training data in the model building process the spectral interrelationships between the urban land cover classes (water, bare soil, vegetation, and impervious surface) and their effect on the estimation of subpixel imperviousness could be examined. In order to exclude irrelevant areas (natural/undeveloped land) from the impervious surface estimation process, single-polarised TerraSAR-X data were used to delineate settlement areas by an object-oriented image classification approach. Furthermore, a change detection method was applied for the respective time period in order to test the suitability of the approach for the automated detection of structural developments within the urban topography. Settlement areas were correctly identified with overall accuracies between 81% and 94%, whilst the comparison of the modelled impervious estimates to the training values gave an absolute mean error below 15%. The results prove the suitability of the approach for an area-wide but selective mapping and monitoring of impervious surface cover within settlement areas only.

Dokumentart:Zeitschriftenbeitrag
Titel:Settlement detection and impervious surface estimation in the Mekong Delta using optical and SAR remote sensing data
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Leinenkugel, Patrickpatrick.leinenkugel@dlr.de
Esch, Thomasthomas.esch@dlr.de
Künzer, ClaudiaClaudia.Kuenzer@dlr.de
Datum:15 Dezember 2011
Erschienen in:Remote Sensing of Environment
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:115
DOI :10.1016/j.rse.2011.06.004
Seitenbereich:Seiten 3007-3019
Verlag:Elsevier
Status:veröffentlicht
Stichwörter:Impervious surface; Settlement detection; Support Vector Regression; SPOT-5; TerraSAR-X
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Prozesse der Landoberfläche (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Deutsches Fernerkundungsdatenzentrum > Landoberfläche
Hinterlegt von: Patrick Leinenkugel
Hinterlegt am:28 Nov 2011 09:37
Letzte Änderung:19 Apr 2013 11:20

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