基于GIS的青藏高原人口统计数据空间化

doi:10.11821/xb200301004

Abstract

Abstract:

In the Qinghai-Tibet Plateau, correlation ratios between population density and percentages of arable land and city and town used land at county level reach 0.90 and 0.85 respectively. In Qinghai province, there exists a logarithmic correlation of ratio = -0.86 between population density and average territorial elevation at county level. There is a correlation of ratio = 0.82 between population density and main highway density at county level. Correlation ratios between population density and densities of city and town residential areas, township residential areas and village residential areas reach 0.82, 0.87 and 0.92 respectively. Density of residential areas drops along with increasing of distance to rivers. Therefore, territorial elevation, land use, road and river system are the main factors affecting distribution of population in the Qinghai-Tibet Plateau. Residential areas are an important indicator to distribution of population. Weight values of affecting factors are assigned objectively and multiple sources data fusion technology is applied to spatialize population census data. There is a correlation of ratio > 0.80 between the population density generated by data fusion and actual population at county level, and ratio > 0.75 at township level. The finally generated grid population density not only keeps consistence with statistical population data at county level but also reflects changes of population distribution inside each county.

Key words: Qinghai-Tibet Plateau, population, spatialization

LIAO Shunbao, SUN Jiulin. GIS Based Spatialization of Population Census Data in Qinghai-Tibet Plateau[J].Acta Geographica Sinica, 2003, 58(1): 25-33.

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GIS Based Spatialization of Population Census Data in Qinghai-Tibet Plateau

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