title: Hyperspectral Sensor Data Capability for Retrieving Complex Urban Land Cover in Comparison with Multispectral Data: Venice City Case Study (Italy).
abstract: This study aims at comparing the capability of different sensors to detect land cover materials within an historical urban center. The main objective is to evaluate the added value of hyperspectral sensors in mapping a complex urban context. In this study we used: (a) the ALI and Hyperion satellite data, (b) the LANDSAT ETM+ satellite data, (c) MIVIS airborne data and (d) the high spatial resolution IKONOS imagery as reference. The Venice city center shows a complex urban land cover and therefore was chosen for testing the spectral and spatial characteristics of different sensors in mapping the urban tissue. For this purpose, an object-oriented approach and different common classification methods were used. Moreover, spectra of the main anthropogenic surfaces (i.e. roofing and paving materials) were collected during the field campaigns conducted on the study area. They were exploited for applying band-depth and sub-pixel analyses to subsets of Hyperion and MIVIS hyperspectral imagery. The results show that satellite data with a 30m spatial resolution (ALI, LANDSAT ETM+ and HYPERION) are able to identify only the main urban land cover materials.
authors.affiliation: National Research Council, Institute of Atmospheric Pollution, Via Fosso del Cavaliere, 100, Roma, 00133, Italy.
authors.forename: Rosa Maria
authors.initials: RM
authors.lastname: Cavalli
authors.affiliation: National Research Council, Institute of Atmospheric Pollution, Via Fosso del Cavaliere, 100, Roma, 00133, Italy.
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Fusilli
authors.affiliation: National Research Council, Institute of Methodologies for Environmental Analysis, C.da S. Loja - Zona Industriale, Tito Scalo (PZ), 85050, Italy. simone.pascucci@lara.rm.cnr.it.
authors.forename: Simone
authors.initials: S
authors.lastname: Pascucci
authors.affiliation: National Research Council, Institute of Methodologies for Environmental Analysis, C.da S. Loja - Zona Industriale, Tito Scalo (PZ), 85050, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Pignatti
authors.affiliation: National Research Council, Institute of Atmospheric Pollution, Via Fosso del Cavaliere, 100, Roma, 00133, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Santini
keywords: band-depth analysis; linear spectral unmixing.; object-oriented classification; satellite hyperspectral remote sensing; urban environmental monitoring