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45 lines
1.2 KiB
Markdown
45 lines
1.2 KiB
Markdown
# Skill: PostGIS Migration
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Use this skill when creating database models, migrations, geometry storage or spatial indexes.
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## Read first
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- `docs/DATABASE_SCHEMA.md`
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- `docs/DATABASE_IMPLEMENTATION_PLAN.md`
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- `docs/standards/GIS_STANDARDS.md`
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- `docs/specs/STATE_MACHINES.md`
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- relevant ADRs
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## Spatial rules
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- PostgreSQL + PostGIS is mandatory.
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- Store canonical geometry in PostGIS geometry columns.
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- Preserve original CRS metadata on datasets.
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- Normalize internal spatial operations according to GIS standards.
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- Create spatial indexes for queryable geometries.
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- Use explicit units for area, distance and length.
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## Migration checklist
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- [ ] Add model.
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- [ ] Add migration.
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- [ ] Add indexes.
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- [ ] Add constraints.
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- [ ] Add state enum where required.
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- [ ] Add rollback-safe migration where practical.
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- [ ] Add fixture/test coverage for geometry roundtrip.
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## Forbidden shortcuts
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- No geometry as unvalidated plain text for canonical records.
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- No silent CRS assumptions.
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- No schema drift from docs without updating the contract.
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## Completion report fields
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- Tables changed.
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- Geometry columns added.
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- Indexes added.
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- Migration commands run.
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- Compatibility risks.
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