Interactive map of Swedish police incident reports (crimes, accidents, disturbances) with drill-down search, category filtering, and population-normalized rates across all 290 municipalities.

🗺️ Explore the map — Live demo

# Install dependencies
make install

# Fetch events data and build pipeline
make fetch-events
make pipeline-all

# Start local server
make serve
# Open http://localhost:8080

Prerequisites: Python 3.13+, uv, Tippecanoe

Interactive Map

• Vector tiles rendered with MapLibre GL JS and PMTiles
• Municipality boundaries with incident counts and rates
• Choropleth coloring by absolute count or rate per 10,000 population

Event Drill-Down

• Click any region to browse individual events
• Full-text search with Swedish stemming ("stöld" matches "stölder")
• Filter by 8 crime categories: traffic, property, violence, narcotics, fraud, public order, weapons, other
• Date range presets (7d, 30d, 90d) or custom date picker
• Paginated results with event details and links to police reports

Responsive Design

• Desktop: slide-out drawer for event list
• Mobile: bottom sheet with touch-friendly controls
• Keyboard shortcuts (S search, Esc close, ? help)

crimecity3k/
├── crimecity3k/
│   ├── api/                    # FastAPI backend
│   │   ├── main.py             # App, routes, static file serving
│   │   ├── queries.py          # DuckDB event queries
│   │   ├── fts.py              # Full-text search index
│   │   ├── categories.py       # Event type → category mapping
│   │   └── schemas.py          # Pydantic request/response models
│   ├── municipality_*.py       # Municipality data processing
│   └── sql/
│       └── municipality_aggregation.sql
├── static/                     # Frontend (no build step)
│   ├── index.html
│   ├── app.js                  # MapLibre + drill-down UI (~1400 lines)
│   └── style.css
├── tests/
│   ├── test_*.py               # pytest unit/integration tests
│   └── test_frontend_e2e.py    # Playwright browser tests
├── data/                       # Generated data (gitignored)
│   ├── events.parquet          # Source events
│   ├── municipalities/         # Aggregated parquet files
│   └── tiles/                  # GeoJSONL and PMTiles
└── Makefile                    # Build orchestration

Query parameters for /api/events:

• h3_cell or location_name (required, mutually exclusive)
• start_date, end_date — date range filter
• categories, types — category/type filter
• search — full-text search query
• page, per_page — pagination (max 100 per page)

Upstream: polisen-se-events-history (GitHub release)
    ↓ make fetch-events
events.parquet (100k+ police events, 2022-present)
    ↓ municipality_aggregation.sql
Municipality aggregates with category counts + type breakdown
    ↓ GeoJSON export
GeoJSONL (municipalities.geojsonl.gz)
    ↓ Tippecanoe
PMTiles (municipalities.pmtiles)
    ↓
Interactive web map

make test          # All tests with coverage
make test-unit     # Unit tests only (fast)
make test-e2e      # Playwright browser tests
make check         # Lint (ruff) + type check (mypy)
make format        # Auto-format code
make help          # All available targets

make deploy        # Build container, upload, and deploy
make deploy-status # Check production status
make deploy-logs   # View container logs

• Police Incidents: polisen-se-events-history — daily scrapes from polisen.se API (official "händelsenotiser")
• Municipality Boundaries: Swedish Land Survey (Lantmäteriet)
• Population Data: Statistics Sweden (SCB), 2024

Code: Public Domain

Data: Subject to source terms of use

Implemented by @stefanholek and @dnouri.