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filtering and converting geojson to shapefiles and back
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| // data from geojson lines file from https://mapzen.com/data/metro-extracts/ | |
| cat portland_oregon_osm_line.geojson | jsonfilter features.* > lines.ndjson | |
| cat lines.ndjson | jsonfilter --match="this.properties.bicycle && this.properties.bicycle !== 'no'" > sharedpaths.json | |
| cat lines.ndjson | grep "cycleway" >> sharedpaths.json | |
| cat sharedpaths.json | sort | uniq > dedupe.json | |
| mv dedupe.json sharedpaths.json | |
| cat sharedpaths.json | ndjson-reduce | ndjson-map '{type: "FeatureCollection", features: d}' > sharedpaths.geojson | |
| mkdir shp | |
| cd shp | |
| ogr2ogr -f "ESRI Shapefile" sharedpaths.shp ../sharedpaths.geojson OGRGeoJSON | |
| // then drag drop the shapefile on mapshaper.org, or use the geojson on geojson.io if it's under 5MB or so |
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