string GetGeoJsonText(FeatureCollection feature)
{
var writer = new NetTopologySuite.IO.GeoJsonWriter();
string geoJson = writer.Write(feature);
return(geoJson);
}
private Geometry MapGeometry(NetTopologySuite.Geometries.Geometry geometry)
{
var writer = new NetTopologySuite.IO.GeoJsonWriter();
var geometryJson = writer.Write(geometry);
var geometryObj = JObject.Parse(geometryJson);
var coordinatesJson = geometryObj["coordinates"].ToString(Formatting.None);
var typeJson = geometryObj["type"].ToString(Formatting.None).Replace("\"", "");
return(new Geometry(typeJson, coordinatesJson));
}
public static Geometry MapFromNTSGeometry(NetTopologySuite.Geometries.Geometry geometry)
{
if (geometry == null)
{
return(null);
}
var writer = new NetTopologySuite.IO.GeoJsonWriter();
var geometryJson = writer.Write(geometry);
var geometryObj = JObject.Parse(geometryJson);
var coordinatesJson = geometryObj["coordinates"].ToString(Formatting.None);
var typeJson = geometryObj["type"].ToString(Formatting.None).Replace("\"", "");
return(new Geometry(typeJson, coordinatesJson));
}
static void Main(string[] args)
{
var points = System.Text.Json.JsonSerializer.Deserialize <Point[]>(File.ReadAllText("track_1.json"));
var features = new FeatureCollection();
features.Add(new Feature(new LineString(points.Select(x => new Coordinate(x.Longitude, x.Latitude)).ToArray()),
new AttributesTable()));
var pointsConverted = points.Select <Point, (double longitude, double latitude, double accuracy, long timeOffset)>(p => (p.Longitude, p.Latitude, p.Accuracy, 0)).ToList();
var filtered = pointsConverted.Filter(toleranceInMeter: 20);
var coordinates = filtered.Select(x => new Coordinate(x.longitude, x.latitude)).ToArray();
features.Add(new Feature(new LineString(coordinates), new AttributesTable()));
var geojsonWriter = new NetTopologySuite.IO.GeoJsonWriter();
File.WriteAllText("track_1.json.geojson", geojsonWriter.Write(features));
}
public void Export(string fileName)
{
var writer = new NetTopologySuite.IO.GeoJsonWriter();
StreamWriter geoJsonFile = new StreamWriter(fileName, false, Encoding.UTF8);
// Start geojson feature collection
geoJsonFile.WriteLine("{ \"type\": \"FeatureCollection\", \"features\": [");
bool first = true;
foreach (var diagramObject in _diagram.DiagramObjects)
{
if (!first)
{
geoJsonFile.Write(",");
}
var geometryJson = writer.Write(diagramObject.Geometry);
var propertyJson = writer.Write(CreatePropertiesJsonObject(diagramObject));
string line = "{ \"type\": \"Feature\", \"geometry\":" + geometryJson + ",\"properties\":" + propertyJson + "}";
geoJsonFile.WriteLine(line);
if (first)
{
first = false;
}
}
// End geojson feature collection
geoJsonFile.WriteLine(" ] }");
geoJsonFile.Close();
}
