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ndjson2geojson.js
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ndjson2geojson.js
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#! /usr/bin/env node
/* jshint esnext:true */
const LineInputStream = require('line-input-stream'),
fs = require('fs'),
argv = require('yargs')
.usage('ndjson2geojson [filename.json]\n\nConverts newline-delimited GeoJSON file to regular GeoJSON.')
.argv;
let filename = argv._[0];
let source;
if (filename) {
source = fs.createReadStream(filename).on('error', ()=>{
console.error("Couldn't open file.");
process.exit(1);
});
} else {
source = process.stdin;
}
let prev;
const stream = LineInputStream(source)
.setEncoding("utf8")
.on("error", console.error)
.on("line", function(line) {
if (prev !== undefined) {
console.log(' ', prev + ',');
}
prev = line;
}).on("end", function() {
console.log(' ', prev);
console.log(' ]');
console.log('}');
});
if(stream.readable) {
console.log(
`{
"type": "FeatureCollection",
"features": [`);
}