Generate sample frame with GridEZ R algorithm
Skill level needed: Advanced
Sample designs supported: 1, 2, 3, 4, 5, 6
Use this tutorial to generate your own GridEZ sample frame when a gridded population dataset is not available in GridSample.org (e.g., HRSL or a bespoke gridded population dataset), or when you are an advanced user with a reason to select your sample in R. GridEZ is an R algorithm that groups contiguous gridded population cells into EA-like units of approximately similar total population. The algorithm requires (1) gridded population raster, (2) strata boundaries of the area(s) of interest, converted to raster, and (3) settlement type (e.g., urban/rural areas) raster. Recommended sources of strata and settlement type boundaries are provided if the user does not have their own.