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…
Option pricing+Greeks, bond pricing/yield & day-counts for DuckDB (Python, QuantLib)
The web portal for OpenGeoResearch.
The image classifier api 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.
Detecting and Correcting Spatial Bias in VGI Using Remote Sensing — OSM evaluated against USGS 3DEP LiDAR (DGCNN segmentation) and NAIP over the UIUC campus, scaling to an urban→rural gradient.
The smartphone app for OpenGeoResearch.
Model, method and tools for building a knowledge base from the OpenStreetMap folksonomy: the OF4OSM ontology.
Physical unit conversion & dimensional analysis (14 dimensions) for DuckDB (Rust)
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)
XSLT 3.0 / XQuery 3.1 / XPath 3.1 over XML for DuckDB (Python, SaxonC-HE)
LightGBM for DuckDB/SQL — train/predict model registry, hyperparameter search, native categoricals, feature importance and SHAP, exposed as a VGI worker
Decode BGP MRT routing dumps in DuckDB with SQL — RouteViews/RIPE RIB and updates with AS-path and community helpers. A VGI worker.
Color science — RGB/HSL/LAB, CIEDE2000 ΔE & WCAG contrast for DuckDB (Rust)
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