Cronotopia Preprocessed Database

This repository hosts preprocessed database distributions for Cronotopia, an offline-first spatio-temporal search engine and vector map server.

The database is distributed as a seekable Zstandard-compressed SQLite file (cronotopia.db.zst), enabling direct read-only execution without extracting to disk.

Contents

The unified database bundles:

• Historical Entities & Events: Geospatial coordinates, dates, and claims extracted from Wikidata.
• Knowledge Base: Full-text Wikipedia article sections indexed with SQLite FTS5.
• Vector Embeddings & ANN Index: Semantic embeddings and clustered Matryoshka ANN index.
• Vector Map Tiles: Base map tiles (OpenStreetMap / MVT) stored internally for offline map rendering.

Quick Start

1. Download the Database

wget https://huggingface.co/datasets/eja/cronotopia/resolve/main/cronotopia.db.zst

2. Run with Cronotopia

Cronotopia can mount and serve the .zst database directly with zero disk decompression:

./cronotopia --db cronotopia.db.zst

The web interface will be available at http://localhost:35248.

(Optional) If you plan to run batch modifications, further ingestion, or AI sync, decompress it first:

./cronotopia --db cronotopia.db.zst --decompress
./cronotopia --db cronotopia.db

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Documentation & Source Code

For binary downloads, source compilation, ingestion pipelines, REST APIs, and Model Context Protocol (MCP) tool integration, visit the Cronotopia GitHub repository.