Kanahiro Iguchi

GeoParquet is a file format based on Apache Parquet for efficient storage of large geospatial datasets. Well-sorted Parquet achieves better compression and better query performance. However, it is not enough for streaming features with acceptable performance.

As one of the sponsors, and as CTO of MIERUNE, I'll introduce our company by focusing on the technologies we work with. Founded in 2016, MIERUNE has grown into a technology company specialized in geospatial technology and modern web architecture.

MapboxVectorTiles have changed the geospatial ecosystem. Vector data distribution has become more efficient, map rendering has moved from server-side to client-side, map styling has become more common. But does that mean we no longer need raster tiles? No.

MIERUNE is a geospatial tech company in Japan. We set FOSS4G as a foundation of us and continuously join the communities as an user, a developer or a contributor. Thesedays we have been committing our new service - MIERUNE BASE.

Vectortile ecosystem have made big changes in Web Mapping, especially in terms of Client-side map rendering. Thesedays, costs of producing and streaming tiles have been dramatically reduced by some techniques - tippecanoe, PMTiles… and so on.

GTFS is stands for General Transit Feed Specification, which is developed by Google and used for describing schedules of public transpotation. A bunch of dataset is distributed in the world and GTFS includes geospatial information - stops and routes.

PythonとQGIS（オープンソースのGISソフトウェア）を用いて、「GTFS」と呼ばれる公共交通機関の路線・時刻表データを容易に可視化するツール「GTFS-GO」を開発・公開しました。当初よりアップデートを重ね、「GTFSの可視化」だけではなく「運行頻度集計機能」や「GTFSデータリポジトリ（試験運用中）との連携機能」が追加され、GTFS活用の幅が大きく広がっています。 本トラックでは、「GTFS-GO」とその開発の背景を紹介します。