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عمومی::
مجموعه داده شبکهای جمعیت مورد مطالعه
With a gridded population dataset and geographic boundary of the study area, GridSample allows a two-step process to sample "seed" cells with probability proportionate to estimated population size, then "grows" PSUs until a minimum population is achieved in each PSU.
We replicated the 2010 Rwanda Demographic and Health Survey (DHS) in GridSample by sampling the WorldPop 2010 UN-adjusted 100 m � 100 m gridded population dataset, stratifying by Rwanda's 30 districts, and oversampling in urban areas.
Where census data are not available, outdated, or known to be unreliable, individual survey teams have begun to experiment with gridded population sampling as an alternative [6, 7, 8, 9, 10, 11], and organizations that fund routine surveys are beginning to recommend gridded population datasets as alternative sample frames [12].
To date, however, no tools exist to support complex survey selection from gridded population datasets, and there is scant guidance to use these emerging methods.
This paper (1) describes how gridded population datasets have been used as alternative sample frames to outdated or inaccurate census data, (2) introduces GridSample [13], an R package, for the first-stage selection of complex household surveys using gridded population data, and (3) summarizes options to implement gridded population samples in the field.
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