ArcGIS Maps SDK for JavaScript · Open data
MeteoSwiss × ParquetLayer
Swiss weather forecasts loaded from Apache Parquet files and explored directly in the browser.
ArcGISPythonParquetOpen data
Python downloads MeteoSwiss E4 local forecasts and produces Parquet files for points, square cells and hexagons. GitHub Actions refreshes them every six hours.
ArcGIS Maps SDK for JavaScript loads these files directly with ParquetLayer. The app steps through forecast hours with definitionExpression and switches between geometry types.
- Around 6,000 locations and 48 hours of forecasts
- Points, square cells and hexagons with GeoParquet
- Python pipeline with pyarrow and shapely