An implementation of GeoJSON written in .NET Core 2.0. The library complies with the requirements of RFC 7946 (https://tools.ietf.org/html/rfc7946). Can be found on nuget https://www.nuget.org/packages/geojson.
The library does not support section 6 of RFC 7946, extending GeoJSON with Foreign Members. You would need to extend the existing Geometries, Feature, and FeatureCollection classes with the additional properties included in the serialized JSON.
Given some GeoJSON data, such as:
{
"type": "Feature",
"geometry": {
"type": "Point",
"coordinates": [ 102.0, 0.5 ]
},
"properties": {
"prop0": "value0"
}
}
You can receive the text and deserialize it to a GeoJSON object
GeoJson data = JsonConvert.DeserializeObject<GeoJson>(jsonString);
Once the data is deserialized, you can cast it to its actual type
switch (data.Type)
{
case GeoJsonType.Feature:
{
Feature feature = (Feature)data;
break;
}
...
}
If you know what kind of GeoJSON you're receiving, you can deserialize to it directly:
FeatureCollection Col = FeatureCollection.FromJson(data);
And also go back to JSON data:
string Json = Col.ToJson(Formatting.Idented);
Or you can create a GeoJSON object and serialize it:
Position Pos1 = new Position(100.0, 0.5);
Position Pos2 = new Position(101.0, 1.0);
MultiPoint Mp = new MultiPoint(new Position[] {Pos1, Pos2});
string Json = JsonConvert.Serialize(Mp);
Each of the 9 GeoJSON types: Feature, FeatureCollection, GeometryCollection, LineString, MultiLineString, MultiPoint, MultiPolygon, Point, and Polygon all have convenience methods ToJson() and FromJson() to make serialization and deserialization easy.
There are two additional types that can be used. A LinearRing is a LineString that is connected as the start and end and forms the basis of a polygon. You can also use the abstract Geometry class that encompasses LineString, MultiLineString, MultiPoint, MultiPolygon, Point, and Polygon.
The Feature 'Properties' property implements an IDictionary<string, dynamic> in order to accomodate any type of property structure that may
be sent.
Added a method to remove interior linear rings from a Polygon object.
Fixed bug for MultiLineString with less than 2 coordinates.
Bug fix for NULL geometry JSON token in a Feature, which is allowed by the RFC.
Changed JSON serialized property names to proper camel case by default to be RFC compliant. Added strong-named assembly signing.
Fixed sequence comparison null value handling.
Enabled the use of the bounding box property on all GeoJSON types.
Actually fixed targeting netstandard1.6 instead of v1.6.1.
Fixed targetting of netstandard1.6, dropped JSON.NET to 9.0.1. Added netstandard2.0 and net45 as target frameworks.
Retargetted library to netstandard1.6.
Initial release of the library.