Based on a data dimension compression technique, this paper studies the principles and method of remote sensing information extraction for urban built up land.

通过压缩数据维的方式，研究城市建筑用地信息准确提取的原理和方法。

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We start at the rank-size rule by urban population and the rank-size rule by urban built-up area, and derive a mathematical relationship that the land use size of a city and its population.

从前人的成果，即以人口表示的城市位序-规模法则和以建成区面积表示的位序-规模法则出发，演绎出城市的用地规模和人口数量呈异速增长。

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This paper uss the factor analysis to evaluate and compare the intensive land use of the urban built-up areas of 17 cities in Shandong province.

本文运用因子分析法对山东省17个地级市建成区的土地集约利用状况进行了评价和比较。

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