VGI (Vector Gateway Interface) — DuckDB extension for extending DuckDB in any language over Apache Arrow IPC. No C++/compilation required.

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…

The image classifier api for OpenGeoResearch.

The web portal for OpenGeoResearch.

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.

The smartphone app for OpenGeoResearch.

Model, method and tools for building a knowledge base from the OpenStreetMap folksonomy: the OF4OSM ontology.

Option pricing+Greeks, bond pricing/yield & day-counts for DuckDB (Python, QuantLib)

Correction of maps(location data) using check-in data(VGI) data, NU 302 R&D Project

XGBoost for DuckDB/SQL — train/predict model registry, hyperparameter search, native categoricals, feature importance and SHAP, exposed as a VGI worker

TypeScript server & client library for the VGI-RPC framework — Apache Arrow IPC over stdin/stdout and HTTP

Model exploring knowledge production and data quality in crowdsourced VGI projects.

Symbolic math/CAS — simplify, solve, diff & integrate for DuckDB (Python, SymPy)

Classical NLP — NER, sentiment, language detection & lemmatization for DuckDB (Python, spaCy)

Query Elasticsearch/OpenSearch as tables with search_after+PIT in DuckDB (Go)

Audio features — tempo, MFCC, spectral, key & beats for DuckDB (Python, librosa)

PII detection, redaction & anonymization for DuckDB (Python, Microsoft Presidio)

Global news via GDELT (free) + NewsAPI for DuckDB (Python)

Scholarly search across OpenAlex/arXiv/Crossref for DuckDB (Python)

FF1 format-preserving encryption, HMAC tokenization & redaction for DuckDB (Rust)