public static string ToGeoJson(FeatureCollection featureCollection)
{
var stringWriter = new StringWriter();
using (var writer = new GeoJsonWriter(stringWriter))
{
writer.WriteStartObject();
writer.WritePropertyName("features");
writer.WriteStartArray();
if (featureCollection.Features.Count < 100000)
{
writer.WriteFeatures(featureCollection);
}
else
{
writer.WriteFeaturesMultithreaded(featureCollection);
}
writer.WriteEndArray();
if (featureCollection.CRS != null)
{
writer.WriteCrs((CRSBase)featureCollection.CRS);
}
writer.WritePropertyName("type");
writer.WriteValue("FeatureCollection");
writer.WriteEndObject();
stringWriter.Flush();
return(stringWriter.ToString());
}
}
private static string AddFeatures(IReadOnlyList <Feature> features, int fromIndex, int toIndex)
{
StringWriter stringWriter = new StringWriter();
using (GeoJsonWriter writer = new GeoJsonWriter(stringWriter))
{
writer.WriteFeatures(features, fromIndex, toIndex);
stringWriter.Flush();
return(stringWriter.ToString());
}
}
