Year-specific third-level geography
Third-level geography information is only available for selected countries and samples in IPUMS International where National Statistical Offices provide the information and also when third-level units meet confidentiality treshold of 20,000 population. IPUMS does not spatially harmonize third-level geography and changes in boundaries over time are not accounted for.
Year-specific geography variables and GIS boundary files are intended for studying and displaying one specific sample year for a country. Year-specific variables provide greater detail than spatially harmonized variables because they do not need to account for boundary changes over time. Units below 20,000 population are aggregated for confidentiality purposes.
The attribute data include codes for the corresponding year-specific variable at the first and the second administrative level. Taking Bangladesh 1991 as example, the attribute table codes for "IPUM1991" in the Bangladesh 1991 shapefile combines GEO1_BD1991, GEO2_BD1991, and the third-level geography GEO3_BD1991. The rational being that first-level administrative units are nested within second-level administrative units, which in turn are nested within third-level administrative units. Other codes in the attribute table includes the "UPAZ1991" codes that correspond to codes provided by the National Statistical Offices. Parent codes represent GEO2_BD1991 codes - the parent for GEO3_BD1991. For a complete list of all year-specific variables at the first, second, and third level of geography, click here.
IPUMS International has only recently started working on lower levels of geography, as more countries (or samples) become available, we will keep adding to the list. The table below lists the few countries where we have released third-level information along with GIS maps. Click on each sample year to download the year-specific GIS shapefile.
|Country||Third-level geography||Sample years|
|Bangladesh||Upazila||1991 2001 2011|
|China||County (maps available for selected urban areas only in 2000)||2000, 1990 (NA), 1982 (NA)|
|Mali||District||1987 1998 2009|
|Senegal||Commune, arrondissement, or village||2002 2013|
|South Africa||Local municipality||2007 2011 2016|