I am not able to convert the daily NIFC GeoJSON data into KML file using GeoTools lib. I am pretty new to GIS data.

Sample GeoJSON data : https://opendata.arcgis.com/datasets/5da472c6d27b4b67970acc7b5044c862_0.geojson

I have tried the below code so far:

URL url = URLs.fileToUrl(new 
HashMap<String, Object> params = new HashMap<>();
params.put("url", url);
DataStore in = DataStoreFinder.getDataStore(params);

if(in == null) {
  throw new IOException("couldn't open datastore from "+url);
SimpleFeatureCollection features = in.getFeatureSource(in.getTypeNames()[0]).getFeatures();
Encoder encoder = new Encoder(new KMLConfiguration());
ByteArrayOutputStream os = new ByteArrayOutputStream();
try {
  encoder.encode(features, KML.kml, os);
  String out = os.toString().replaceAll("kml:", "");
} catch (Exception e) {

The above code DataStore in = DataStoreFinder.getDataStore(params); is not able to find dataStore and is always returning null.

  • did you make sure your maven file has a dependency to the gt-geojsonstore module?
    – Ian Turton
    Commented Sep 15, 2020 at 7:38

1 Answer 1


Looks like there might be an issue with the current version of the GeoJSONStore handling URLs but your code works if I use the GeoJSONDataStoreFactory.FILE_PARAM.key and a file.

The fix will be in the nightly (25.x) build tonight and will make the 24.0, 23.3 releases in the coming weeks.

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