# TIGER Geocoder Data Dumps

Pre-built PostgreSQL database dumps for the [TIGER/Line Rural Address Geocoder](https://git.supported.systems/mctiger/mctiger).

## Available Dumps

| File | State | Vintage | Size | Description |
|------|-------|---------|------|-------------|
| `idaho-tiger-2024.dump` | Idaho (ID) | 2024 | ~297 MB | All 44 counties with edges, featnames, places |

## Quick Start

Instead of downloading and importing raw TIGER/Line shapefiles, restore a pre-built dump:

```bash
# 1. Download the dump (from releases)
wget https://git.supported.systems/mctiger/mctiger-data/releases/download/v2024.1/idaho-tiger-2024.dump

# 2. Restore to your PostGIS database
pg_restore -h localhost -U postgres -d tiger_geocoder idaho-tiger-2024.dump
```

## What's Included

Each dump contains:

- **tiger_edges** - Road segments with geometries, names, address ranges
- **tiger_featnames** - Alternate road names and aliases
- **tiger_places** - City/town boundaries with pre-computed centroids
- **Indexes** - GiST spatial indexes and GIN trigram indexes (ready to query)

## Creating Your Own Dumps

To create a dump for another state:

```bash
# 1. Download TIGER/Line data
tiger-download --state 06  # California

# 2. Import into PostGIS
tiger-import --state 06

# 3. Create dump
pg_dump -Fc -h localhost -U postgres tiger_geocoder > california-tiger-2024.dump
```

## Versioning

Dumps follow the pattern: `{state}-tiger-{year}.dump`

- **Year** matches the TIGER/Line vintage (e.g., 2024)
- New releases are created when Census Bureau publishes updated data (typically annually)

## License

TIGER/Line data is public domain (US Government work). See [Census Bureau Terms](https://www.census.gov/data/developers/about/terms-of-service.html).