四川省人口分布与土地利用的关系及人口数据空间化试验

RELATIONSHIP BETWEEN POPULATION DISTRIBUTION AND LAND USE AND SPATIALIZATION OF POPULATION CENSUS DATA

通过对四川省158个市县中人口密度小于1000人/km2的151个市县的人口密度与各种土地利用指数的多元回归分析发现,人口密度与各种土地利用指数的多元线性相关系数为0.93,人口密度的对数与各种土地利用指数的多元线性相关系数为0.96。根据这一关系对四川省1999年的市县人口统计数据进行空间化,用罗江县的实际乡镇人口数据对空间化结果进行检验。结果为通过空间化得到的各乡镇的人口数与各乡镇的实际人口数的相关系数为0.91,平均误差为16.5%。

Through the multiple variable regression analysis, it was found that there was a linear correlation ( r=0.93 ) between mean population densities and various land use indexes for 151 cities and counties, with population densities less than 1 000 person per square kilometers, in Sichuan Province and a logarithmic correlation of r=0.96 between them. Based on the established quantitative population density - land use model, the spatialization of population census data in Sichuan in 1999 was carried out. And actual township's population data in Luojiang County was used to verify the precision of spatialization. The result showed that the correlation ratio between actual township's total population and the total population calculated by spatialization equaled 0.91 and mean error percentage was 16.5%.