Measuring Urban Sprawl Patterns in Greater Cairo Metropolitan Region
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Measuring Urban Sprawl Patterns in Greater Cairo Metropolitan Region Taher Osman 1,2 & Takafumi Arima 3 & Prasanna Divigalpitiya 3
Received: 30 January 2015 / Accepted: 10 August 2015 # Indian Society of Remote Sensing 2016
Abstract On the subject of informal sprawl in recent Egypt, this research takes Greater Cairo Region (GCR) as a case and puts forward that informal urban sprawl can be estimated from spatial disposition, informal sprawl efficacy and outer influences; and then evolves a geo-spatial indicators system for quantifying sprawl. So as to estimating these indicators, various data sources are selected, including land use maps, digitized map of the highways and town centers, and population statistical data, etc. GIS spatial analysis methods are used to spatialize these indicators into 120 m×120 m cells. In addition, an incorporated sprawl index (ISI) is estimated by weight sum of these indicators. The results demonstrated that geospatial indicators system can captivate most of the exemplary attributes and interior differentia of urban sprawl. Building land in Cairo has kept quick growing with considerable amount of low efficacy and dysfunctional spatial disposition. The subsequent sprawl attributes are determined by each indicator’s exemplary spatial disposition of urban sprawling, conspicuous fragmentation and unevenness of landscape due to ineffective implementation of land use planning, improper
* Taher Osman [email protected] Takafumi Arima [email protected] Prasanna Divigalpitiya [email protected] 1
Department of Urban Design, Planning and Disaster Management, Graduate School of Human-Environment Studies, Kyushu University, Fukuoka, Japan
2
Faculty of urban and Regional Planning, Cairo University, Giza, Egypt
3
Faculty of Human-Environment Studies, Kyushu University, Kyushu, Japan
pattern of exemplary discontinuous development, strip development and leapfrog development, low efficacy of sprawl, low development density, low population density output in newly developed areas; and unfavorable influences on agriculture and environment and population life. Keywords Informal urbanization . Geo-Spatial Indices . Quantifying urban sprawl . Greater Cairo Region . Egypt
Introduction Over the past five decades, Egypt encountered an unmatched urbanization process; notwithstanding all governmental attempts to decelerate it. Being only less than 10 % of total population at the onset of the 20th century, the urban population has turned to be 45 % by the end of this century. The annual growth rate of the urban population is estimated at 2.2 % until 2050 – surpassing the 1.8 % annual growth rate of the entire population (UNDP 2004). The population of Cairo region is presently around 16–18 million inhabitants, which corresponds nearly a quarter of Egypt’s population of 72,798 million inhabitants (2006) and about half of the country’s urban population. Cairo is a Bprimate region^ and has preserved its urban ascendancy over the last few decenniums. Presently, the population of Cair
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