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Geographic unit relationships can be updated in two three ways.

1. If you need to update a few relationships, this can be done individually within the FDW.

2. If you need to update many relationships, this is best done by uploading a relationship table.

3. For new Markets and IDP camps, their relationships to admin units can be specified when uploaded, and the system will automatically create the relationships.

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Relationship Types include:

• Boundaries stay the same and data can be aggregated in both directions

  • Successor: This administrative unit did not change

  or barely

  • between geographic unit set versions.

  • Equivalent: Two units are equivalent between different geographic unit sets and do not need to be the same unit type, e.g., population and crop production units that are equivalent.

  • Seceded: Two units are equivalent between different geographic unit sets, are the same unit type, and can be part of separate countries, e.g., the admin 1 states of South Sudan seceded the admin 1 states of Sudan.

  • Name change: Only the name has changed between geographic unit set versions.

  • Promotion: An administrative unit becomes a higher-level administrative unit, e.g., Admin2 becomes Admin1.

  • Demotion: An administrative unit becomes a lower-level administrative unit, e.g., Admin1 becomes Admin2.

• Boundaries change

  • Data can be aggregated forward in time

    • Merge: Parts of, or the whole of, two or more administrative units were joined together to create a new administrative unit version in the same geographic unit set.

    • Aggregate: Parts of, or the whole of, two or more administrative units were joined together to create a new administrative unit. However, unlike merge, this relationship doesn’t indicate anything about the relationship between the geographic unit sets.

  • Data can be aggregated backward in time

    • Split: One administrative unit was divided to form two or more new administrative units.

    • Split_demotion: One administrative unit was divided to form two or more new administrative units and the new units are demoted to a lower admin level.

  • Data can not be aggregated

    • Redistribute: Parts of more than one administrative unit were divided and redistributed into more than one new administrative unit.

Updating Geographic Unit Relationships in the FDW

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