On the occasion of day 7 of the #30DayMapChallenge (topic: Accessibility), Dominic Weckmüller released the GeoParquet Visualizer. The GeoParquet Visualizer is a free and open-source (MIT license) online tool to quickly view one or several GeoParquet files. It is based on MapLibre and parquet-wasm, a set of WebAssembly bindings to read and write the Apache Parquet format, by Kyle Barron.
Among others, the GeoParquet Visualizer offers the following features:
- The GeoParquet files can be uploaded from your machine or be imported from a remote URL.
- Plain Parquet support: Automatic detection of latitude / longitude columns if no WKB1 geometry column is found
- Dynamic styling: Each layer can be assigned contour and fill color and opacity
- View modes: You can toggle between the standard Web Mercator projection and a 3D globe view
- Stateful URLs: The map’s view, projection, loaded GeoParquets, basemap style, and background color are stored in URL parameters so that the session can be shared
Try out the tool (link with an example GeoParquet file pre-loaded) and inspect the GitHub repository. Or check the demo video:
Footnotes
Well-Known Binary↩︎