VGI (Vector Gateway Interface) — DuckDB extension for extending DuckDB in any language over Apache Arrow IPC. No C++/compilation required.
VGI worker exposing Dev-0.4b typed decisions to DuckDB
Python SDK for the VGI (Vector Gateway Interface) protocol — host DuckDB scalar, table, aggregate, and table-in-out functions in an external worker over Arrow IPC.
A VGI worker exposing TypeSafe System One questions (choice, noul, score) to DuckDB/SQL as LATERAL-joinable table functions
Row pattern matching in DuckDB with SQL — SQL:2016 MATCH_RECOGNIZE (PARTITION/ORDER/PATTERN/DEFINE/MEASURES) for sequences: V-shapes, funnels, sessionization, event patterns. A VGI worker.
Research data on crowd-mapping project Wikimapia: Wikimapia is a major privately-owned volunteered geographic information (VGI) project to collect information about places. Over the past ten years, Wikimapia has attracted hundreds of thousands of contributors and collected millions of data points, including towns, restaurants, lakes, and tourist…
Java SDK for the VGI (Vector Gateway Interface) protocol — host DuckDB scalar, table, aggregate, and table-in-out functions in an external worker over Arrow IPC.
The web portal for OpenGeoResearch.
Detecting and Correcting Spatial Bias in VGI Using Remote Sensing — OSM evaluated against USGS 3DEP LiDAR + NAIP across two regions and all 102 Illinois counties, with community-validated correction. I-GUIDE Summer School 2026 · VCO talk Sept 23, 2026.
Option pricing+Greeks, bond pricing/yield & day-counts for DuckDB (Python, QuantLib)
The image classifier api for OpenGeoResearch.
TypeScript server & client library for the VGI-RPC framework — Apache Arrow IPC over stdin/stdout and HTTP
The smartphone app for OpenGeoResearch.
Read and write fixed-width / flat-file / mainframe data in DuckDB with SQL — Perl unpack / Python struct / COBOL copybooks (COMP-3, EBCDIC, OCCURS, REDEFINES). A VGI worker.
Model, method and tools for building a knowledge base from the OpenStreetMap folksonomy: the OF4OSM ontology.
Scholarly search across OpenAlex/arXiv/Crossref for DuckDB (Python)
Physical unit conversion & dimensional analysis (14 dimensions) for DuckDB (Rust)
Video/audio/container metadata via ffprobe in DuckDB (Go)
BM25 full-text search with stemming & tokenization for DuckDB (Rust, tantivy)
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