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geojson-stream
Advanced tools
Stream features into and out of GeoJSON objects and Feature Collections. Little more than JSONStream with pre-filled settings.
npm install --save geojson-stream
geojsonStream.stringify()
Returns a transform stream that accepts GeoJSON Feature objects and emits a stringified FeatureCollection.
geojsonStream.parse(mapFunc)
Returns a transform stream that accepts a GeoJSON FeatureCollection as a stream and emits Feature objects.
mapFunc(feature, index)
is an optional function which takes a Feature
, and its zero-based index in the FeatureCollection
and returns either a Feature
, or null/undefined
if the feature should be omitted from output.
const geojsonStream = require('geojson-stream');
const fs = require('fs');
const out = fs.createWriteStream('buildings-with-id.geojson');
fs
.createReadStream(`buildings.geojson`)
.pipe(geojsonStream.parse((building, index) => {
if (building.geometry.coordinates === null) {
return null;
}
building.id = index;
return building;
}))
.pipe(geojsonStream.stringify())
.pipe(out);
FAQs
stream features into and out of geojson
We found that geojson-stream demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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