(May 2020, 59 pages, 9.26 MB PDF). Executive summary (6 pages, 1.32 MB PDF). A report from the Thematic Research Network on Data and Statistics (TReNDS) of the United Nations (UN) Sustainable Development Solution Network (SDSN) and CIESIN contributors provides guidance on the use of gridded population datasets from the POPGRID Data Collaborative, of which CIESIN is a member. The report reviews data sets from the Collaborative, including data sets from CIESIN, Esri, and WorldPop Project, among others.