Spatial Datatype (geometry) to GeoJSON

Question

I want to convert geom (geometry) datatype to GeoJSON. How could I do that?

For example, the geometry in WKT:

    POLYGON((4552         


        

Answer 1

I think, you can produce geojson at server side when you get data from Sql Server.

You should examine GeoJSON.Net and similar question

var modelF = new List();
foreach (DataRow dr in ds.Tables[0].Rows)
     {
       var point = new GeoJSON.Net.Geometry.Point(new GeoJSON.Net.Geometry.GeographicPosition(Convert.ToDouble(dr["latitude"].ToString()), Convert.ToDouble(dr["longitude"].ToString())));
       var featureProperties = new Dictionary { };
       foreach (DataColumn dataColumn in ds.Tables[0].Columns)
            {
              featureProperties.Add(dataColumn.ColumnName, dr[dataColumn].ToString());
            }
       modelF.Add(new GeoJSON.Net.Feature.Feature(point, featureProperties));
     }
var fcol = new FeatureCollection(modelF);
var serializedData = JsonConvert.SerializeObject(fcol, Formatting.Indented, new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver(), NullValueHandling = NullValueHandling.Ignore });
return serializedData;

have a goo day.