摘要
在自然地理单元与行政单元交叉情况下,如何根据行政单元统计数据获得该自然地理单元的精确数据是当前研究的难点和重点之一。以青藏高原为自然地理单元和人口数据为例,选用并设计了数据统计的运算方法(实际数值模型、边缘等密度法推算模型、最小值模型、最大值模型和估测值模型等5个线性统计模型)及试验应用。主要研究结论为:(1)在青藏高原中国境内分布于6个省区的221个县(市),其中155个县(市)位于高原内部,其余66个县市位于高原边缘地区,文中给出了边缘县在高原内外的面积比;(2)边缘等密度法的计算结果更接近实际,而估测值模型与边缘等密度法计算结果相差最小;截止2001年,青藏高原人口约1204万人;(3)结合居民点的实际空间数据进行叠加分析或结合多源数据融合技术,将进一步提高测算的精确度。
Abstracts: One of the most difficult and emphasized research problems nowadays is how to getthe accurate data of a geographical unit that is intercrossed by the administrative units according to the statistical data. Choosing the Tibetan Plateau in China as a case of the geographical unit, we computed concisely the population and its change based on statistical yearbooks and census data of five periods. The ideas and computing methods about how to study on geographical units according to the survey data based on administrative units were the key points we talked, which gave reference to accurate basic data research on geographical units, especially on Tibetan Plateau. The real data model, equal-density edge theoretical data model, minimum data model, maximum data model and expecting data model were applied in computing population on Tibetan Plateau. The results showed : (1) There were 221 counties or cities distributing in 6 different provinces in the range of Tibetan Plateau in China, 155 of which were inside and 66 of which were on the edge. (2) The result from equal-density edge theoretical data model was the closest to the fact, while the expecting data model was the second. So the equal-density edge theoretical data model is fit for analyzing and computing statistical data on geographical units. The population on Tibetan Plateau in China was 12.04 million or so in 2001. (3) Linking with real inhabitant settlement distributions and other multi-source data to overlap and analyze will give a more accurate result.
出处
《地理科学进展》
CSCD
北大核心
2005年第1期11-20,i001,共11页
Progress in Geography
基金
中国科学院知识创新项目(KZCX3-SW-339)国家自然科学基金委员会项目(90202012
40471009)中科院地理科学与资源研究所知识创新工程主干项目(CXIOG-E01-01)
关键词
青藏高原
自然地理单元
行政单元
统计数据分析方法
人口
Tibetan Plateau
geographical unit
analysis methods of statistical data
population
administrative unit
