Class LazyGeoJsonIter

A lazy GeoJSON FeatureCollection iterator.

Parses features one at a time using a manual JSON state machine, without building the full DOM. Memory peak is O(single feature) instead of O(all features).

Usage (JS)

const iter = parseGeoJsonLazy(hugeGeoJsonStr);
let feature;
while ((feature = iter.nextFeature()) !== null) {
  // feature is a Float64Array of [lng0, lat0, lng1, lat1, ...]
  gl.bufferSubData(gl.ARRAY_BUFFER, offset, feature);
  offset += feature.byteLength;
}
console.log(`Processed ${iter.remaining()} features`);
iter.free();
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