Build a CityJSON Land Use and Bounding Setback Auditor

Parse CityJSON 2.0 LandUse and Building objects to evaluate parcel boundary compliance. Compute structural setbacks from geographicalExtent coordinates to flag municipal zoning buffer infringements.

Municipal Zoning Officer

Ingest CityJSON 2.0 files containing LandUse parcels and Building footprint geometries.

Extract 2D bounding polygon coordinates from geographicalExtent and surface boundary indices.

Calculate minimum Euclidean distance between building footprint edges and parcel boundary lines.

Generate a structured zoning infraction docket highlighting non-compliant setback violations.

Zoning review console displaying parcel boundary overlays, calculated setbacks, and infraction callouts.

Use open municipal 3D city models formatted in CityJSON 2.0 or generate synthetic parcel/building pairs. Starter examples below are synthetic. They are not downloaded records.

CityJSON Extracts LandUse objects, Building objects, and geographicalExtent bounding arrays from CityJSON 2.0 Section 2.

pydantic-ai, shapely, FastAPI. Pydantic AI guarantees strictly validated infraction reports and typed geometric distance records. Fast instruction model capable of interpreting municipal zoning codes against geometric coordinates.

Submit runnable source, pinned dependencies, setup commands, a working interface, example outputs, and a recorded end-to-end demo. Include tests and an action log.

Parses LandUse and Building CityObjects from standard CityJSON 2.0 payloads.

Computes horizontal setbacks between building perimeters and parcel boundaries.

Flags structures violating minimum required municipal setback thresholds.

```json [ { "input": { "parcel_id": "PARCEL-401", "parcel_extent": [ 0, 0, 0, 50, 50, 0 ], "building_id": "BLDG-401", "building_extent": [ 6, 6, 0, 30, 30, 15 ], "required_min_setback_meters": 5 }, "expected_output": { "parcel_id": "PARCEL-401", "building_id": "BLDG-401", "computed_min_setback_meters": 6, "zoning_compliant": true, "infractions": [] } }, { "input": { "parcel_id": "PARCEL-402", "parcel_extent": [ 0, 0, 0, 40, 40, 0 ], "building_id": "BLDG-402", "building_extent": [ 2, 5, 0, 35, 35, 12 ], "required_min_setback_meters": 5 }, "expected_output": { "parcel_id": "PARCEL-402", "building_id": "BLDG-402", "computed_min_setback_meters": 2, "zoning_compliant": false, "infractions": [ "Western setback of 2.0m violates minimum required setback of 5.0m by 3.0m" ] } } ] ```

Automated checks serve as preliminary screening; final zoning permits require certified land surveyor sign-off. Use mock external writes. Require human review before any real deployment.