Geographic Information Systems Asked on July 28, 2021
I’m loving the ndjson-cli tools for working with newline-delimited GeoJSON files. But I can’t seem to find a tool that converts a standard GeoJSON (whether minified or prettified) ond converts it to newline-delimited. Is there one?
I wrote a dedicated command-line tool on NPM to do this, now:
https://www.npmjs.com/package/geojson2ndjson
Usage
npm install -g geojson2ndjsongeojson2ndjson myfile.geojson | ...Or read from standard input:
cat myfile.geojson | geojson2ndjson | ...Examples
List the properties of every feature, without the geometries:
geojson2ndjson myfile.geojson | ndjson-map d.properties
Correct answer by Steve Bennett on July 28, 2021
Borrowing from this StackOverflow answer and using the jq command line tool you can filter GeoJSON feture objects and dump them as new-line delimiter with:
cat my.geojson | jq -c ".features[]" > nld_features.json
The important parts here are the -c flag which prints compact JSON objects on a single line, and the filter ".features[]" which selects the features object from the top level of the object, and then calls an Array/Object iterator over the values to break the features into separate JSON objects.
If you want to extract coordinates as well, you can use the different filters in jq to extract the values as well.
Answered by om_henners on July 28, 2021
Tippecanoe also has this functionality built in:
tippecanoe-json-tool source.json > out.nd.json
I've only tested with small examples, but given that tippecanoe is blazing fast and built for giant geojsons, this should be a robust option. Source here.
Answered by Charlie Lefrak on July 28, 2021
You can use ogr2ogr:
ogr2ogr -f GeoJSONSeq ~/Downloads/yuba.geojson.ld ~/Downloads/yuba.geojson
Answered by dsummersl on July 28, 2021
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