VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO

Good understanding of a city’s thermal regime and its dependency on the structure of the city provides key knowledge serving as an input for long-term strategic decision-making by local governments. The urban heat island, and more specifically overheating of the streets and adjacent buildings during...

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Main Authors: J. Novotny, M. Pivovarnik, S. J. Khalsa, F. Zemek
Format: Article
Language:English
Published: Copernicus Publications 2016-06-01
Series:The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Online Access:https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B2/741/2016/isprs-archives-XLI-B2-741-2016.pdf
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spelling doaj-e8a1a70a9a664300a91f04c7f55d89e62020-11-24T21:05:30ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342016-06-01XLI-B274174510.5194/isprs-archives-XLI-B2-741-2016VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNOJ. Novotny0M. Pivovarnik1S. J. Khalsa2F. Zemek3Dept. of Remote Sensing, Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech RepublicDept. of Remote Sensing, Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech RepublicDept. of Remote Sensing, Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech RepublicDept. of Remote Sensing, Global Change Research Institute CAS, Bělidla 986/4a, 603 00 Brno, Czech RepublicGood understanding of a city’s thermal regime and its dependency on the structure of the city provides key knowledge serving as an input for long-term strategic decision-making by local governments. The urban heat island, and more specifically overheating of the streets and adjacent buildings during summer heat waves, has been pointed out as an important issue in the city of Brno, Czech Republic. A complex research effort using remote sensing techniques has started which will analyse the impact of city structure on the thermal behaviour, principally the role of vegetation in the thermal regulation of streets. Two airborne data sets were acquired: hyperspectral data using CASI, SASI and TASI sensors (ITRES, Canada) and lidar mapping using a Riegl 680i instrument (RIEGL, Austria). The thermal data were acquired on two occasions: 7 February 2015 (winter season) and 4 July 2015 (summer season). A laser scanning data-set was acquired on 22 September 2015 with a point cloud density of approximately 15 points/m<sup>2</sup>. Surface temperature was retrieved from the thermal hyperspectral data by applying a temperature-emissivity separation algorithm. The 3-D structure of the city was classified from the laser scanning data; we distinguished three main classes: bare land, buildings and vegetation. In the paper we present figures comparing thermal behaviour with other features collected along linear transects through the central part of the city.https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B2/741/2016/isprs-archives-XLI-B2-741-2016.pdf
collection DOAJ
language English
format Article
sources DOAJ
author J. Novotny
M. Pivovarnik
S. J. Khalsa
F. Zemek
spellingShingle J. Novotny
M. Pivovarnik
S. J. Khalsa
F. Zemek
VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
author_facet J. Novotny
M. Pivovarnik
S. J. Khalsa
F. Zemek
author_sort J. Novotny
title VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
title_short VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
title_full VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
title_fullStr VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
title_full_unstemmed VISUALISATION OF DEPENDENCIES BETWEEN CITY STRUCTURE AND THERMAL BEHAVIOUR IN BRNO
title_sort visualisation of dependencies between city structure and thermal behaviour in brno
publisher Copernicus Publications
series The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
issn 1682-1750
2194-9034
publishDate 2016-06-01
description Good understanding of a city’s thermal regime and its dependency on the structure of the city provides key knowledge serving as an input for long-term strategic decision-making by local governments. The urban heat island, and more specifically overheating of the streets and adjacent buildings during summer heat waves, has been pointed out as an important issue in the city of Brno, Czech Republic. A complex research effort using remote sensing techniques has started which will analyse the impact of city structure on the thermal behaviour, principally the role of vegetation in the thermal regulation of streets. Two airborne data sets were acquired: hyperspectral data using CASI, SASI and TASI sensors (ITRES, Canada) and lidar mapping using a Riegl 680i instrument (RIEGL, Austria). The thermal data were acquired on two occasions: 7 February 2015 (winter season) and 4 July 2015 (summer season). A laser scanning data-set was acquired on 22 September 2015 with a point cloud density of approximately 15 points/m<sup>2</sup>. Surface temperature was retrieved from the thermal hyperspectral data by applying a temperature-emissivity separation algorithm. The 3-D structure of the city was classified from the laser scanning data; we distinguished three main classes: bare land, buildings and vegetation. In the paper we present figures comparing thermal behaviour with other features collected along linear transects through the central part of the city.
url https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLI-B2/741/2016/isprs-archives-XLI-B2-741-2016.pdf
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