Built-up encroachment and the urban field: a comparison of forty European cities
Built-up encroachment and the urban field: a comparison of forty European cities
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DOI：
10.1068/a39382
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发表时间：
2008-09-01
期刊：
影响因子：
--
通讯作者：
Pumain, Denise
中科院分区：
文献类型：
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作者：
Guerois, Marianne;Pumain, Denise
我们将城市场定义为城市密度的空间组织，根据从中心到外围的梯度递减。这一城市领域可以从已建成地区的侵蚀来估计。CORINE土地覆盖物数据库能够测量欧洲城市建成区空间分布的梯度值。而不是指数或幂函数，这通常提供了最佳的人口密度分布的拟合，我们发现，两个线性函数强烈区分中心和周边梯度提供了最佳的拟合建成的表面。1990年和2000年的CORINE图像之间的比较表明，北方和南欧城市之间的城市扩展趋势趋同。然而，从数据中仍然很难决定哪一种城市场模型是赢家：陡峭的中心梯度会被稀释到密度较低的边缘，还是中心部分较近的边缘会融入城市中心群的有序模式？
We define the urban field as the spatial organisation of urban densities according to decreasing gradients from centre to periphery. This urban field can be estimated from the encroachment of built-up areas. The CORINE Land Cover database enables the measurement of the gradient values for the spatial distribution of built-up areas in European cities. Instead of the exponential or power functions, which usually provide the best fit for the distributions of population densities, we find that two linear functions strongly differentiating a central and a peripheral gradient provide the best fit for built-up surfaces. The comparison between the 1990 and 2000 CORINE images demonstrates a convergence in the trend of urban spread between Northern and Southern European cities. However, it is still difficult from the data to decide which of the models of urban field is winning: will the steeper central gradient become diluted into the less dense periphery, or are the closer fringes of the central parts becoming integrated into the ordered pattern of the urban central agglomerations?