Converting GeoJSON response to FeatureCollection
//Steps to Converting GeoJSON response to FeatureCollection
//1. Add NetTopologySuite.IO.GeoJson package from Nuget Package Manager.
//2. Write Following Code Snap:
string Filepath = "Your filepath here";
var josnData = File.ReadAllText(Filepath);
var reader = new NetTopologySuite.IO.GeoJsonReader();
var featureCollection =
reader.Read<GeoJSON.Net.Feature.FeatureCollection>(josnData);
//in my case i did it like this
for (int fIndex = 0; fIndex < featureCollection.Features.Count; fIndex++)
{
var AreaDetails =
featureCollection.Features[fIndex].Properties;
for (int AIndex = 0; AIndex < AreaDetails.Count;
AIndex++)
{
var element = AreaDetails.ElementAt(AIndex);
var Key = element.Key;
var Value = element.Value;
if (Key == "GML_ID")
{
areaDetails.StateCode = Value.ToString();
}
else if (Key == "STNAME")
{
areaDetails.State = Value.ToString();
}
else if (Key == "DISTFULL")
{
areaDetails.DistrictCode = Value.ToString();
}
else if (Key == "DTNAME")
{
areaDetails.District = Value.ToString();
}
else if (Key == "IPCODE")
{
areaDetails.TalukaCode = Value.ToString();
}
else if (Key == "IPNAME")
{
areaDetails.Taluka = Value.ToString();
}
else if (Key == "VLGCD2001")
{
areaDetails.AreaCode = Value.ToString();
}
else if (Key == "VILLNAME")
{
areaDetails.AreaName = Value.ToString();
}
}
var AreaCoords = featureCollection.Features[fIndex].Geometry;
var Type = AreaCoords.Type;
LocationDetails locationDetails = new LocationDetails();
if (Type == GeoJSONObjectType.Polygon)
{
var polygon = AreaCoords as GeoJSON.Net.Geometry.Polygon;
var polygonCoords = polygon.Coordinates[0].Coordinates;
for (int AIndex = 0; AIndex < polygonCoords.Count; AIndex++)
{
locationDetails.lat = Convert.ToDecimal(polygonCoords[AIndex].Latitude);
locationDetails.lng = Convert.ToDecimal(polygonCoords[AIndex].Longitude);
locationDetailsList.Add(locationDetails);
}
}
I hate to answer my I question but after two days of hit & trial I get it working with both NetTopology and GeoJson
// get the JSON file content
var josnData = File.ReadAllText(destinationFileName);
// create NetTopology JSON reader
var reader = new NetTopologySuite.IO.GeoJsonReader();
// pass geoJson's FeatureCollection to read all the features
var featureCollection = reader.Read<GeoJSON.Net.Feature.FeatureCollection>(josnData);
// if feature collection is null then return
if (featureCollection == null)
{
return;
}
// loop through all the parsed featurd
for (int featureIndex = 0;
featureIndex < featureCollection.Features.Count;
featureIndex++)
{
// get json feature
var jsonFeature = featureCollection.Features[featureIndex];
Geometry geom = null;
// get geometry type to create appropriate geometry
switch (jsonFeature.Geometry.Type)
{
case GeoJSONObjectType.Point:
break;
case GeoJSONObjectType.MultiPoint:
break;
case GeoJSONObjectType.LineString:
break;
case GeoJSONObjectType.MultiLineString:
break;
case GeoJSONObjectType.Polygon:
{
var polygon = jsonFeature.Geometry as GeoJSON.Net.Geometry.Polygon;
var coordinates = new List <Point3D>();
foreach (var ring in polygon.Coordinates)
{
if (ring.IsLinearRing())
{
foreach (var coordinate in ring.Coordinates)
{
var location = coordinate as GeographicPosition;
if (location == null)
{
continue;
}
coordinates.Add(new Point3D(location.Longitude,
location.Latitude,
location.Altitude.HasValue ? location.Altitude.Value : 0 ));
}
}
}
geom = new Polygon(new LinearRing(new CoordinateSequence(coordinates.ToArray())),
null);
}
break;
case GeoJSONObjectType.MultiPolygon:
break;
case GeoJSONObjectType.GeometryCollection:
break;
case GeoJSONObjectType.Feature:
break;
case GeoJSONObjectType.FeatureCollection:
break;
default:
throw new ArgumentOutOfRangeException();
}
}