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Document SQL to reassign Crimea to the Ukraine

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Jürgen Fischer 2022-04-29 16:59:57 +02:00
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resources/data/README_world_map.md
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@ -42,6 +42,12 @@ crossing the 180˚ meridian. Those would be rendered as large invalid polygons c
This layer was created by importing data source [2] as-is.
##### Manual clean-up of attribute tables (all layers)
Finally, in the GeoPackage the less meaningful fields in the attribute tables were dropped.
In the GeoPackage the less meaningful fields in the attribute tables were dropped.
And finally Crimea and Sevastopol were restored to belong to the Ukraine using
```sql
update states_provinces set iso_a2='UA',sov_a3='UA',adm0_a3='UA',admin='Ukraine',gu_a3='UKR' where name IN ('Crimea','Sevastopol');
update countries set geom=st_union(geom, (select st_union(geom) from states_provinces where name IN ('Crimea','Sevastopol'))) where name='Ukraine';
update countries set geom=st_difference(geom, (select st_union(geom) from states_provinces where name IN ('Crimea','Sevastopol'))) where name='Russia';
```