Build a CityJSON Land Use Zoning Assessment Engine

Analyze CityJSON 2.0 LandUse objects to evaluate floor-area ratios and permitted function categories. Generate municipal zoning compliance checks before architectural schematics proceed.

Zoning Compliance Officer

Load CityJSON 2.0 city model files containing LandUse and Building CityObjects.

Extract attributes including area-parcel and designated municipal usage codes.

Calculate gross building volume against parcel boundary limits.

Produce zoning compliance scorecard with variance advisories for planning boards.

Zoning review screen with parcel metrics table, usage classification badge, and variance warning pane.

Construct synthetic CityJSON files containing LandUse objects with area-parcel attributes and adjacent buildings. Starter examples below are synthetic. They are not downloaded records.

CityJSON Employs CityJSON Section 2.1 LandUse attributes structure including area-parcel key-value attributes.

vercel-ai-sdk, nextjs, zod. Vercel AI SDK provides fast streaming UI integration for parcel calculations and zoning narrative summaries. Requires modern hosted LLM accessible through TypeScript API endpoints.

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.

Engine calculates gross footprint area from CityJSON bounding coordinates.

Usage category mismatches trigger explicit non-compliant status.

Output JSON includes numerical parcel area, building footprint, and zoning ratio.

```json [ { "input": { "parcel_id": "LU-101", "attributes": { "function": "Commercial", "area-parcel": { "value": 2500, "uom": "m2" } }, "proposed_building_footprint_m2": 1200, "max_coverage_ratio": 0.6 }, "expected_output": { "parcel_id": "LU-101", "computed_ratio": 0.48, "is_compliant": true, "variance_needed": false } }, { "input": { "parcel_id": "LU-102", "attributes": { "function": "Low Density Residential", "area-parcel": { "value": 800, "uom": "m2" } }, "proposed_building_footprint_m2": 600, "max_coverage_ratio": 0.5 }, "expected_output": { "parcel_id": "LU-102", "computed_ratio": 0.75, "is_compliant": false, "variance_needed": true } } ] ```

Zoning validation checks are informative advisory summaries and do not supersede statutory municipal land board rulings. Use mock external writes. Require human review before any real deployment.