Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/6558
Title: High resolution remote sensing of densely urbanised regions : a case study of Hong Kong
Authors: Nichol, JE 
Wong, MS 
Keywords: Thermal remote sensing
Urban heat island
Aerosols
MODIS
PM₂.₅
Issue Date: 15-Jun-2009
Publisher: MDPI AG
Source: Sensors, 15 June 2009, v. 9, no. 6, p. 4695-4708 How to cite?
Journal: Sensors 
Abstract: Data on the urban environment such as climate or air quality is usually collected at a few point monitoring stations distributed over a city. However, the synoptic viewpoint of satellites where a whole city is visible on a single image permits the collection of spatially comprehensive data at city-wide scale. In spite of rapid developments in remote sensing systems, deficiencies in image resolution and algorithm development still exist for applications such as air quality monitoring and urban heat island analysis. This paper describes state-of-the-art techniques for enhancing and maximising the spatial detail available from satellite images, and demonstrates their applications to the densely urbanised environment of Hong Kong. An Emissivity Modulation technique for spatial enhancement of thermal satellite images permits modelling of urban microclimate in combination with other urban structural parameters at local scale. For air quality monitoring, a Minimum Reflectance Technique (MRT) has been developed for MODIS 500 m images. The techniques described can promote the routine utilization of remotely sensed images for environmental monitoring in cities of the 21st century.
URI: http://hdl.handle.net/10397/6558
ISSN: 1424-8220 (eISSN)
DOI: 10.3390/s90604695
Rights: © 2009 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland. This article is an open-access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
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