Geographic unit relationships provide a path for the system to follow when looking at comparing data across different administrative versions, e.g., comparing ML_1983 to ML_2016.
Geographic unit relationships can be updated in two ways.
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Relationship Types must be one of the predefined options:
Successor: There was no This administrative unit did not change or barely any change in this administrative unit changed between geographic unit set versions.
Merge: Parts of, or the whole of, two or more administrative units were joined together to create a new administrative unit.
Split: An administrative unit was divided to form new administrative units.
Aggregate: An administrative unit becomes a higher-level administrative unit, e.g., Admin2 becomes Admin1.
Redistribute: Parts of an administrative unit were divided and redistributed to become part of new administrative units.
Demotion: An administrative unit becomes a lower-level administrative unit, e.g., Admin1 becomes Admin2.
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Go to Metadata Management > Spatial > Geographic Unit Relationships.
Click Add Geographic Unit Relationship.
Choose a From Unit and a To Unit. You can search for units by typing in the name of a unit's name into the drop-down menu.
Choose a Relationship Type.
Click one of the Save options.
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You will need to copy the appropriate information from the FlowChart tab to the Relationship Table tab.
Copy information by dataset.
If there are multiple relationship sets, copy the data for the oldest start year first so they are at the top of the sheet. When all relationships for that year are done, begin again for the next set. This ensures the data are ordered chronologically.
For cases where there is one start row that splits into multiple rows in the FlowChart tab (e.g., when a unit splits or redistributes), make sure you copy over the starting information for each individual split.
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