DBPapers
DOI: 10.5593/SGEM2014/B21/S8.093

PRACTICAL APPLICATION OF SATELLITE INDICES TO IDENTIFY URBAN AND PERI-URBAN DEVELOPMENT IN THE MUNICIPALITY OF CLUJ-NAPOCA (ROMANIA)

H. Iulian-Horia, A. Mircea
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-10-0 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 1, 721-728 pp

ABSTRACT
Remote-sensing based on multi-temporal satellite images has allowed us the mapping of changes in urban and peri-urban areas in order to illustrate the urban development over time. In this article we have used Landsat TM and ETM+ images for a period of time with significant changes in urban structures. On the basis of these images we have calculated a series of indices to differentiate built-up surfaces from the ones covered with vegetation or aquifer surfaces. Thus, we have used NDBI (Normalized Difference Building Index) and IBI (Index Based Built-up Index) indices to identify impervious urban areas, SAVI (Soil-Adjusted Vegetation Index) indices to highlight vegetationcovered areas and MNDWI (Modified Normalized Difference Water Index) indices in the case of aquifers. The mapped results at accuracy over 90.0% represent a useful method in the study of urban planning. Over time, these modifications have been quantified using spatial analysis. Therefore, we have spotted changes in land use areas and their arrangement in relation to city centre and its limit. The combined use of Remote Sensing and GIS has created valuable tools for making better decisions in urban and environmental planning.

Keywords: remote sensing, built-up areas, satellite indices, urban development, spatial analysis.

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