- Open shapefile in QGIS
- Open attributes table
- Select features using an expression "WHERE snow IS NOT NULL"
- Select all
- Save Selection as new layer
- Save layer as snow-priority-specified.geojson
TopoJSON is an extension of GeoJSON that encodes topology so the dataset loads more quickly over a network.
topojson -o snow-plan-specified.topo.json --simplify-proportion .5 --properties snow snow-priority-specified.geojson
Big thanks to Chris Doerge and the GIS team at LFUCG for providing the data and helping to understand it.