collections - GeoTools:创建一个点并将其添加到 featureCollection

Question

我正在实现轨迹点的插值。所以，基本上，我需要沿着从起点到终点的方位角创建几个点。问题是，我无法将创建的点添加到集合中:

SimpleFeatureType featureType = featureSource.getSchema(); 

GeometryFactory geometryFactory = JTSFactoryFinder.getGeometryFactory(null); 
SimpleFeatureBuilder featureBuilder = new SimpleFeatureBuilder(featureType); 

SimpleFeatureCollection collection = featureSource.getFeatures(); 

/* Irrelevant code here 
----------------------- 
*/ 

Point2D newPt = setPointByAzimuth(startingPointCoords, azimuth, distance_to_next_point); 

Point pointToCollection = geometryFactory.createPoint(new Coordinate(newPt.getX(), newPt.getY())); 

featureBuilder.add(pointToCollection); //not quite sure what this does 

SimpleFeature feature = featureBuilder.buildFeature(null);       

collection.add(feature); 

但是，当我运行它时，集合大小不会改变，也不会向该集合添加任何内容。
我不确定这里有什么问题。

谢谢，

Answer 1

Not every implementation of SimpleFeatureCollection is mutable .

尝试另一种方式:

创建 new DefaultFeatureCollection 并添加您的积分；

然后将其添加到 MapContent与 addLayer .