1930s-1960s珠江三角洲城镇建成区位序—规模、扩展及其形态特征

基于1930s、1960s的1:5万地形图的解译，借助GIS软件，计算了1930s和1960s珠江三角洲地区15个城镇建成区面积、位序-规模、紧凑度与圆形率，并对该时段内建成区扩展强度及其形态特征进行了分析.1930s与1960s位序-规模分别呈Y=11.48X-1.30 、Y=15.63X-1.28，城镇体系具有相似的特征，呈现金字塔的城镇规模结构；建成区规模小，扩展速度低，约0.98km2/10a；建成区的扩张主要表现为四周扩展和主轴线扩展；形态紧凑性差，呈现分散化态势.依据城镇发育的条件与形态特征，将城镇形态分为低山丘陵主导型、河网主导型、平原主导型3种.

RANK-SIZE,EXPANSION AND FORM CHARACTERISTICS OF URBAN BUILT-UP AREAS IN PEARL RIVER DELTA DURING 1930s AND 1960s

Based on the 1:50 000 Topography map of 1930s and 1960s and supported by GIS, the area, rank-size, compact ratio and circularity ratio of 15 built-up areas in the Pearl River Delta are calculated, and the growth intensity and form characteristics during 1930s and 1960s are analyzed. The rank-size distribution of 1930s and 1960s was Y=11.48X-1.30 and Y=15.63X-1.28 respectively. The structure of Urban system had the similar characteristics, presenting the'pyramid' structure. The built-up areas were small and the expansion speed was slow with 0.98km2/10a. The growth pattern was mainly the expansion along the principal axis or around the built-up area. The form compact nature was weak, going to the decentralization tendency. According to the urban development conditions and form characteristics, the urban forms were divided into three types-low hill leading type, river network leading type and plain leading type.