The Bulgarian population grid 2011 was produced by National Statistical Institute of the Republic of Bulgaria (BNSI) as a part of the ESSnet project: ”Geostat 1B – representing Census data in European population grid” according signed grant aggreement No 50502.2009.004-2011.536 between BNSI and European Commission.
Geostat 1B is the second phase of the project GEOSTAT of European Statistical System and European Forum for Geography and Statistics. The project aims at representing various population characteristics of the 2011 population Census in 1 km² harmonized grid datasets and developing guidelines and methods for linking the population data to common European harmonized grid.
The information is available for download on the following link: https://www.nsi.bg/en/node/12309.