The Process
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COD-PS are based on the ‘best-available data principle’ and as such have no unique and standardized source. The preferred source is recent population estimates and projections produced by National Statistical Offices published after the census. However, these are not always available or do not provide the sex and age disaggregation required by humanitarian organizations. Further, as the date of the last census passes by (and changes to the administrative structure occur), more survey data becomes available to update estimates and projections of recent, postcensal population dynamics. In these cases, the ‘best-available data principle’ mandates to provide sex and age disaggregated projections that reflect the more up-to-date data environment. In this section, we describe the application of the “best available data” humanitarian standard to the construction of COD-PS datasets – noting the diverse array of population data and humanitarian landscapes that need to be considered.
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COD-PS Required Characteristics (minimum requirements in red)
Metadata Source organization must be clearly identified, and acceptable for humanitarian use. Population data are endorsed by IM Network. The dataset must be able to be shared (at least once at the onset stage of an emergency). P-codes from COD-PS match COD-AB (tables can link 1:1). Reference year (of the projections/estimates) must be clearly stated.
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Tabular Attributes Field names are clear and understandable. Field names are used consistently across all Admin layers. Population breakdown exists for sex and age for each administrative unit (with sex disaggregation for every age cohort). All values must be integers. All values must be present. Sum The sum of data matches the value of a higher admin level. Data is checked for inconsistencies. Data is checked for outliers. P-codes are the unique identifiers used in the country (ideally government sourced). P-codes are present and unique for each administrative unit. P-code attribution is consistent across all layers. P-codes for higher-level administrative units are is included in lower levels. P-codes and feature names (and therefore feature counts) should conform to established and accepted administrative boundary datasets (COD-AB) - however, it may be that the COD-PS is the more reliable authority.
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