Population Density Gradients and Urbanisation Measurement
Population Density Gradients and Urbanisation Measurement
复制标题
人口密度梯度和城市化测量
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
J. Deutsch
中科院分区：
文献类型：
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作者：
G. Alperovich;J. Deutsch
指数密度函数已被广泛用于描述和比较城市人口结构。在这篇文章中，认为函数中的指数可能会被对CBD和人口普查区域质心的错误识别所偏差。用最小二乘法证明了这种(对CBD位置的)错误指定导致了对梯度的低估，并表明偏差的大小本身与CBD被错误识别的距离误差的程度有关。
The exponential density function has been used widely to describe and compare the patterning of urban population. In this article it is argued that the exponent within the function can be biassed by the misidentification of the CBD and of the centroids of census tracts. Using a least-squares method it is shown that such misspecification (of the location of the CBD) leads to an underestimation of the gradient, and shows that the magnitude of the bias is itself related to the extent of the distance error by which the CBD is misidentified.