Some Problems on the Application of Population Data in Geo-science
人口中数据在地学应用中的若干问题

In recent years,quality and uncertainty of population data have attracted a mass of attention,but more attention was paid to uncertainty of population data itself and less to uncertainty that was results from inaccurate using.Population data that used in geo-science mainly includes modern population investigation data,population forecast data and historical population data.Different population data that come from different sources have different characters.When population data are used,attribute character,spatial character and temporal character of population data should be paid attention.As to attribute character,the main attention should pay to the differences of statistical indexes of population data,the differences of population data of statistical resources and the change of standard of setting up town or city.As to spatial character,the main attention should pay to illegibility and uncertainty of administrative borderline,adjustment and change of administrative regions and the difference between the study area and the statistical unit of population data.As to temporal character,the statistical time of population data should be cared for.When population data with different sources and time are used,they should be integrated firstly.The main measures include: reclassifying and recounting data based on different statistical indexes and standards of population data;recounting data based on adjustment of administrative regions,or spatializing population data;forecasting or calculating population data for special time based on accurate temporal character of population.