Simple Features GeoJSON Java

Simple Features GeoJSON Lib

The Simple Features Libraries were developed at the National Geospatial-Intelligence Agency (NGA) in collaboration with BIT Systems. The government has "unlimited rights" and is releasing this software to increase the impact of government investments by providing developers with the opportunity to take things in new directions. The software use, modification, and distribution rights are stipulated within the MIT license.

Pull Requests

If you'd like to contribute to this project, please make a pull request. We'll review the pull request and discuss the changes. All pull request contributions to this project will be released under the MIT license.

Software source code previously released under an open source license and then modified by NGA staff is considered a "joint work" (see 17 USC § 101); it is partially copyrighted, partially public domain, and as a whole is protected by the copyrights of the non-government authors and must be released according to the terms of the original open source license.

About

Simple Features GeoJSON is a Java library for writing and reading Simple Feature Geometries to and from GeoJSON.

Usage

View the latest Javadoc

Read

//String content = ...    

Geometry geometry = FeatureConverter.toGeometry(content);
mil.nga.sf.Geometry simpleGeometry = geometry.getGeometry();

/* Read as a generic GeoJSON object, Feature, or Feature Collection */
//GeoJsonObject geoJsonObject = FeatureConverter.toGeoJsonObject(content);
//Feature feature = FeatureConverter.toFeature(content);
//FeatureCollection featureCollection = FeatureConverter.toFeatureCollection(content);

Write

//Geometry geometry = ...

String content = FeatureConverter.toStringValue(geometry);

Feature feature = FeatureConverter.toFeature(geometry);
String featureContent = FeatureConverter.toStringValue(feature);

FeatureCollection featureCollection = FeatureConverter.toFeatureCollection(geometry);
String featureCollectionContent = FeatureConverter.toStringValue(featureCollection);

Map<String, Object> contentMap = FeatureConverter.toMap(geometry);

Installation

Pull from the Maven Central Repository (JAR, POM, Source, Javadoc)

<dependency>
    <groupId>mil.nga.sf</groupId>
    <artifactId>sf-geojson</artifactId>
    <version>3.3.3</version>
</dependency>

Build

Build this repository using Eclipse and/or Maven:

mvn clean install

Remote Dependencies

Simple Features (The MIT License (MIT)) - Simple Features Lib
Jackson Data Processor (Apache License, Version 2.0) - Jackson data-binding functionality and tree-model

mil.nga.sf.geojson.Position.additionalElements: lost additional when FeatureConverter.toStringValue()

Please fill out as much known and relevant information as possible.

Version Information:

SF GeoJSON Java Version: mil.nga.sf:sf-geojson:2.0.4
SF GeoJSON Java Source: Central Repository
IDE Name & Version: Android Studio
Maven Version: Gradle
Java Version: 8
Platform & OS: Android 10
Other Relevant Libraries: -

Expected Results:

What did you expect to happen?

two additional element after FeatureConverter.toStringValue().

Observed Results:

What happened instead?
only one additional element.
How often does this occur?

        List<Position> pointList = new ArrayList<>();
        for (DbTrackPoint tp : t.getPoints()) {
          pointList.add(
              new Position(
                  tp.getLon(), tp.getLat(), tp.getAlt(),
                  1d,
                  2d
              )
          );
        }
        LineString line = new LineString();
        line.setCoordinates(pointList);

        Map<String, Object> propertyMap = new LinkedHashMap<>();
        propertyMap.put("source", SOURCE);

        Feature lineFeature = new Feature(line);
        lineFeature.setProperties(propertyMap);
        featureCollection.addFeature(lineFeature);

      FileUtils.writeStringToFile(
          file,
          FeatureConverter.toStringValue(featureCollection),
          "UTF-8"
      );

But 2 lost, only 1 keep:

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "LineString",
        "coordinates": [
          [
            114.41760627,
            30.47035912,
            14.82720947265625,
            1.0
          ],
          [
            114.41777497,
            30.47037775,
            17.23809814453125,
            1.0
          ]
...

Additional Information:

Can i add more than one additionalElements? Why only one?

ngageoint / simple-features-geojson-java Goto Github PK