Fast and storage-efficient spatial database engine for OpenStreetMap data

The Amazon S3 Tables catalog is a client library that bridges control plane operations provided by S3 Tables to engines like Apache Spark, Flink and others, when used with the Iceberg Table format

Example program that writes Parquet formatted data to plain files (i.e., not Hadoop hdfs); Parquet is a columnar storage format.

Java read and write example for Apache Arrow

Java Native Interface for PROJ

Experimental micro-service for implementing the Zarr spec over HTTP

OSM Route Manager and History Viewer

A prototype Java implementation of reading Parquet files into Stata.

MathML parser to produce valid MathSpeak text

Java program that reads a Parquet input file and writes its data to a CSV output file

A code dump of an old Java Applet that displayed a graph of hikers temperatures while walking the PCT in 2005 and 2006