A1. PSU Sample – GridSample selection

Practitioners of all skill levels can use this tutorial to create sample frames from WorldPop and GRID3 gridded population datasets, and then select stratified or non-stratified samples of primary sampling units (PSUs) that are suitable for use with area-microcensus or two-stage sample designs. Survey coverage and strata boundaries that follow administrative or urban/rural boundaries can be defined within the tool without specialized GIS skills by selecting from pre-loaded datasets. Users, however, can define bespoke survey coverage, strata, and/or PSU boundaries by uploading zipped shapefiles.