VGI (Vector Gateway Interface) — DuckDB extension for extending DuckDB in any language over Apache Arrow IPC. No C++/compilation required.
The image classifier api for OpenGeoResearch.
Option pricing+Greeks, bond pricing/yield & day-counts for DuckDB (Python, QuantLib)
The web portal for OpenGeoResearch.
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…
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.
Correction of maps(location data) using check-in data(VGI) data, NU 302 R&D Project
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.
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
Query Elasticsearch/OpenSearch as tables with search_after+PIT in DuckDB (Go)
Classical NLP — NER, sentiment, language detection & lemmatization for DuckDB (Python, spaCy)
Constraint solving & optimization in DuckDB with SQL — CP-SAT, vehicle routing (VRP/TSP), assignment, scheduling, flows, knapsack and bin-packing via Google OR-Tools. A VGI worker.
PII detection, redaction & anonymization for DuckDB (Python, Microsoft Presidio)
Audio features — tempo, MFCC, spectral, key & beats for DuckDB (Python, librosa)
Parse User-Agent strings to browser/OS/device for DuckDB (Rust, uap-core)
Rich Excel read (formulas/types) and write query to .xlsx for DuckDB (Java, Apache POI)
Detect text encoding & transcode to UTF-8 / fix mojibake for DuckDB (Rust)
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