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04-07: Managing sprawl: From data to policies
Anatomy of Density
New York University, United States of America
We have found a novel way to decompose the average urban density of a city--the ratio of the total population of a city and its urban extent--into three, five, or seven factors that, when multiplied together yield urban density. Decomposing density into its factors--crowding, the occupancy rate, floorpan efficiency, building height, plot coverage, residential land use share, and the saturation of the urban extent by the built-up area--allow us to form a set of pragmatic policies that can increase average urban densities and to assess the potential effectiveness of such policies. We have collected data on the seven factors that together constitute average urban population density in a global sample of ten cities--Dhaka, Hong Kong, Kinshasa, Bangkok, Madrid, Baku, Minneapolis, Wuhan, Cairo, and Bogotá. We will present and discuss these data, much of it surprising, and discuss their implication for the potential for densification in cities in the world at large.
Measuring urban economic density
The London School of Economics, United Kingdom
This paper evaluates the use of different measures of economic
density in assessing urban agglomeration effects, by examining how well they explain household income differences across cities and neighborhoods in six African countries. We examine simple scale and density measures and more nuanced ones which capture in second moments the extent of clustering within cities. The evidence suggests that more nuanced measures attempting to capture within-city differences in the extent of clustering do no better than a simple density measure in explaining income differences across cities, at least for the current degree of accuracy in measuring clustering.
Master scheme for the simplification and digital transformation of urban land management
1IGN FI, France; 2Ministry of Construction, Housing and Urban Planning (MCLAU), Ivory Coast
In April 2017, the Ministry of Construction, Housing and Urban Planning (MCLU) created by decree the Steering Committee for Simplification and Digitization (CP-STD). By setting up this committee, the Ministry is strengthening the coordination and leadership mechanisms for managing the tasks involved in modernizing its administrative functions in line with the vision of reforms recommended by the “Doing Business” program – improving the business environment by simplifying administrative procedures relating to construction, housing, sanitation and urban planning.
In order to implement this transformation within the Administration, the Department has chosen to develop a blueprint of the Simplification and the Digital Transformation of urban land. This study, led by the Permanent Secretariat to the Simplification and the Digital Transformation of the MCLU, and conducted by IGN FI with technical assistance from the BNETD, marks the willingness of the Government to implement reforms.
The National Urban Policy as a Framework for managing Urban expansion and land use change in Malawi
Mnistry of Lands, Housing and Urban Development, Malawi
Malawi has experienced rapid urbanization since independence with 15.3% of the national population living in urban areas in 2008. Estimates by the National Statistics Office (NSO) indicate that 30 % of the population in the country will be urban based by 2030, escalating to 50 % in 2050.
Rapid urbanisation coupled with limited technical and financial capacity among urban development institutions has contributed to unregulated urban growth among others. Government has in the past implemented Rural Development programmes in an attempt to manage urbanization by reducing rural urban migration. .
This paper looks at these programmes and the impact they had on managing urbanization and the lessons learnt from their implementation. The paper concludes that sustainable urbanization can only be achieved through the implementation of a proper guiding framework like the National Urban Policy.
National Physical Development Plan; National Urban Policy ,Secondary Centres;
Rural Growth Centres,urban expansion. Urbanisation;