C# ArcGIS Geometry JSON to WKT

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08-09-2013 12:38 PM
GeorgeSimpson
Occasional Contributor
Anyone have a converter in .NET to go from ArcGIS Geometry JSON to WKT Geometry?  I need to use query geometry from a javascript application in SQL.
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GeorgeSimpson
Occasional Contributor
Here's what I ended up writing.  It could use some cleanup, but seems to work well.

 using System; using System.Collections.Generic; using System.Linq; using System.Web; using Microsoft.SqlServer.Types; using Newtonsoft.Json;   namespace api.AGS {            public abstract class Geometry     {         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public SpatialReference spatialReference { get; set; }          //add methods to convert the geometry to/from WKT           abstract public string ToWKT();               }      public class Point : Geometry     {         public double x { get; set; }         public double y { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? z { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? m { get; set; }          override public string ToWKT()         {             return "POINT(" + this.x.ToString() + " " + this.y.ToString() + ")";         }     }      public abstract class MultiplePointGeometry : Geometry     {         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public bool? hasZ { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public bool? hasM { get; set; }     }      public class Multipoint : MultiplePointGeometry     {         public List<List<double>> points { get; set; }          public override string ToWKT()         {             string WKT = "MULTIPOINT(";             for (int i = 0; i < this.points.Count; i++)             {                 for (int j = 0; j < this.points.Count; j++)                 {                     WKT += this.points.ToString();                     if (j < this.points.Count - 1)                     {                         WKT += " ";                     }                 }                  if (i < this.points.Count - 1)                 {                     WKT += ",";                 }             }             WKT += ")";              return WKT;         }     }      public class Polyline : MultiplePointGeometry     {         public List<List<List<double>>> paths { get; set; }          public override string ToWKT()         {             string points = "";              for (int i = 0; i < this.paths.Count; i++)             {                 points += "(";                 for (int j = 0; j < this.paths.Count; j++)                 {                     for (int k = 0; k < this.paths.Count; k++)                     {                         points += this.paths.ToString();                         if (k < this.paths.Count - 1)                         {                             points += " ";                         }                     }                     if (j < this.paths.Count - 1)                     {                         points += ",";                     }                 }                 points += ")";                  if (i < this.paths.Count - 1)                 {                     points += ",";                 }             }              if (this.paths.Count > 1)             {                 return "MULTILINESTRING" + points;             }             else             {                 return "LINESTRING" + points;             }         }     }      public class Polygon : MultiplePointGeometry     {         public List<List<List<double>>> rings { get; set; }         public override string ToWKT()         {             string ringpts = "";              for (int i = 0; i < this.rings.Count; i++)             {                 ringpts += "(";                 for (int j = 0; j < this.rings.Count; j++)                 {                     for (int k = 0; k < this.rings.Count; k++)                     {                         ringpts += this.rings.ToString();                         if (k < this.rings.Count - 1)                         {                             ringpts += " ";                         }                     }                     if (j < this.rings.Count - 1)                     {                         ringpts += ",";                     }                 }                 ringpts += ")";                  if (i < this.rings.Count - 1)                 {                     ringpts += ",";                 }             }              if (this.rings.Count > 1)             {                 return "MULTIPOLYGON" + ringpts;             }             else             {                 return "POLYGON" + ringpts;             }         }     }      public class Envelope : Geometry     {         public double xmin { get; set; }         public double ymin { get; set; }         public double xmax { get; set; }         public double ymax { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? zmin { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? zmax { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? mmin { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? mmax { get; set; }          override public string ToWKT()         {             return "POLYGON((" + this.xmin.ToString() + " " + this.ymin.ToString() + "," + this.xmin.ToString() + " " + this.ymax.ToString() + "," +                         this.xmax.ToString() + " " + this.ymax.ToString() + "," + this.xmax.ToString() + " " + this.ymin.ToString() + "," +                         this.xmin.ToString() + " " + this.ymin.ToString() + "))";         }     }      public static class GeometryTypes     {         public const String Point = "esriGeometryPoint";         public const String MultiPoint = "esriGeometryMultipoint";         public const String Polyline = "esriGeometryPolyline";         public const String Polygon = "esriGeometryPolygon";         public const String Envelope = "esriGeometryEnvelope";     }  }   

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GeorgeSimpson
Occasional Contributor
Here's what I ended up writing.  It could use some cleanup, but seems to work well.

 using System; using System.Collections.Generic; using System.Linq; using System.Web; using Microsoft.SqlServer.Types; using Newtonsoft.Json;   namespace api.AGS {            public abstract class Geometry     {         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public SpatialReference spatialReference { get; set; }          //add methods to convert the geometry to/from WKT           abstract public string ToWKT();               }      public class Point : Geometry     {         public double x { get; set; }         public double y { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? z { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? m { get; set; }          override public string ToWKT()         {             return "POINT(" + this.x.ToString() + " " + this.y.ToString() + ")";         }     }      public abstract class MultiplePointGeometry : Geometry     {         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public bool? hasZ { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public bool? hasM { get; set; }     }      public class Multipoint : MultiplePointGeometry     {         public List<List<double>> points { get; set; }          public override string ToWKT()         {             string WKT = "MULTIPOINT(";             for (int i = 0; i < this.points.Count; i++)             {                 for (int j = 0; j < this.points.Count; j++)                 {                     WKT += this.points.ToString();                     if (j < this.points.Count - 1)                     {                         WKT += " ";                     }                 }                  if (i < this.points.Count - 1)                 {                     WKT += ",";                 }             }             WKT += ")";              return WKT;         }     }      public class Polyline : MultiplePointGeometry     {         public List<List<List<double>>> paths { get; set; }          public override string ToWKT()         {             string points = "";              for (int i = 0; i < this.paths.Count; i++)             {                 points += "(";                 for (int j = 0; j < this.paths.Count; j++)                 {                     for (int k = 0; k < this.paths.Count; k++)                     {                         points += this.paths.ToString();                         if (k < this.paths.Count - 1)                         {                             points += " ";                         }                     }                     if (j < this.paths.Count - 1)                     {                         points += ",";                     }                 }                 points += ")";                  if (i < this.paths.Count - 1)                 {                     points += ",";                 }             }              if (this.paths.Count > 1)             {                 return "MULTILINESTRING" + points;             }             else             {                 return "LINESTRING" + points;             }         }     }      public class Polygon : MultiplePointGeometry     {         public List<List<List<double>>> rings { get; set; }         public override string ToWKT()         {             string ringpts = "";              for (int i = 0; i < this.rings.Count; i++)             {                 ringpts += "(";                 for (int j = 0; j < this.rings.Count; j++)                 {                     for (int k = 0; k < this.rings.Count; k++)                     {                         ringpts += this.rings.ToString();                         if (k < this.rings.Count - 1)                         {                             ringpts += " ";                         }                     }                     if (j < this.rings.Count - 1)                     {                         ringpts += ",";                     }                 }                 ringpts += ")";                  if (i < this.rings.Count - 1)                 {                     ringpts += ",";                 }             }              if (this.rings.Count > 1)             {                 return "MULTIPOLYGON" + ringpts;             }             else             {                 return "POLYGON" + ringpts;             }         }     }      public class Envelope : Geometry     {         public double xmin { get; set; }         public double ymin { get; set; }         public double xmax { get; set; }         public double ymax { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? zmin { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? zmax { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? mmin { get; set; }         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]         public double? mmax { get; set; }          override public string ToWKT()         {             return "POLYGON((" + this.xmin.ToString() + " " + this.ymin.ToString() + "," + this.xmin.ToString() + " " + this.ymax.ToString() + "," +                         this.xmax.ToString() + " " + this.ymax.ToString() + "," + this.xmax.ToString() + " " + this.ymin.ToString() + "," +                         this.xmin.ToString() + " " + this.ymin.ToString() + "))";         }     }      public static class GeometryTypes     {         public const String Point = "esriGeometryPoint";         public const String MultiPoint = "esriGeometryMultipoint";         public const String Polyline = "esriGeometryPolyline";         public const String Polygon = "esriGeometryPolygon";         public const String Envelope = "esriGeometryEnvelope";     }  }   

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nicogis
MVP Frequent Contributor
if you want use arcobjects:

convert json to igeometry


            string jsonGeometryPoint = "{\"x\" : -118.15, \"y\" : 33.80, \"spatialReference\" : {\"wkid\" : 4326}}";
            IJSONReader jsonReader = new JSONReaderClass();
            jsonReader.ReadFromString(jsonGeometryPoint);
            IJSONDeserializer jsonDeserializer = new JSONDeserializerGdbClass();
            jsonDeserializer.InitDeserializer(jsonReader, null);
            IGeometry geometry = ((IExternalDeserializerGdb)jsonDeserializer).ReadGeometry(esriGeometryType.esriGeometryPoint);
            IPoint point = (IPoint)geometry;




for geometry to wkb you can use CreateWkbVariantFromGeometry of geometryFactory


          IGeometryFactory3 factory = new GeometryEnvironment() as IGeometryFactory3;
          byte[] polygonWKB = geometryFactory.CreateWkbVariantFromGeometry(polygon) as byte[];
          System.Data.SqlTypes.SqlBytes polygonWKB = new System.Data.SqlTypes.SqlBytes(PolygonWKB);
          SqlGeometry sqlGeometry = SqlGeometry.STGeomFromWKB(polygonWKB, 4326);
          SqlGeography sqlGeography = Functions.MakeValidGeographyFromGeometry(sqlGeometry);

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