1990年第四次人口普查数据-分区县统计数据

在1:25万全国基础地理公开数据库基础上，以行政区划简册作为依据进行区县行政区划空间数据更新，并基于统计年鉴获取分区县人口数据，进行人口数据与空间数据的关联处理，形成不同年份分区县统计数据成果。

Based on the national 1:250,000-scale fundamental geographic public database, the spatial data of district and county administrative divisions is updated with the compendium of administrative divisions as the reference. District and county-level population data is then acquired from statistical yearbooks, and association processing is conducted between the population data and the spatial data to generate district and county-level statistical datasets for various years.