pass down the same SpatialReference

Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/Raw/MultipatchFeatureToSpeckleConverter.cs

@@ -37,7 +37,13 @@ public class MultipatchFeatureToSpeckleConverter : ITypedConverter<ACG.Multipatc
       int ptCount = target.GetPatchPointCount(idx);
       for (int ptIdx = ptStartIndex; ptIdx < ptStartIndex + ptCount; ptIdx++)
       {
-        pointList.Add(_pointConverter.Convert(target.Points[ptIdx]));
+        ACG.MapPoint newPt = new ACG.MapPointBuilderEx(
+          target.Points[ptIdx].X,
+          target.Points[ptIdx].Y,
+          target.Points[ptIdx].Z,
+          target.SpatialReference
+        ).ToGeometry();
+        pointList.Add(_pointConverter.Convert(newPt));
       }
       allPoints.Add(pointList);
     }

Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/Raw/MultipointFeatureToSpeckleConverter.cs

@@ -16,7 +16,8 @@ public class MultipointFeatureToSpeckleConverter : ITypedConverter<ACG.Multipoin
     List<SOG.Point> multipoint = new();
     foreach (ACG.MapPoint point in target.Points)
     {
-      multipoint.Add(_pointConverter.Convert(point));
+      ACG.MapPoint newPt = new ACG.MapPointBuilderEx(point.X, point.Y, point.Z, target.SpatialReference).ToGeometry();
+      multipoint.Add(_pointConverter.Convert(newPt));
     }
 
     return multipoint;

Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/Raw/PolygonFeatureToSpeckleConverter.cs

@@ -30,6 +30,7 @@ public class PolygonFeatureToSpeckleConverter : ITypedConverter<ACG.Polygon, IRe
     for (int idx = 0; idx < partCount; idx++)
     {
       ACG.ReadOnlySegmentCollection segmentCollection = target.Parts[idx];
+      segmentCollection.SpatialReference = target.SpatialReference;
       SOG.Polyline polyline = _segmentConverter.Convert(segmentCollection);
 
       bool isExteriorRing = target.IsExteriorRing(idx);

Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/Raw/PolylineFeatureToSpeckleConverter.cs

@@ -48,6 +48,7 @@ public class PolyineFeatureToSpeckleConverter : ITypedConverter<ACG.Polyline, IR
 
     foreach (var segmentCollection in polylineToConvert.Parts)
     {
+      segmentCollection.SpatialReference = target.SpatialReference;
       polylineList.Add(_segmentConverter.Convert(segmentCollection));
     }
     return polylineList;

Converters/ArcGIS/Speckle.Converters.ArcGIS3/ToSpeckle/Raw/SegmentCollectionToSpeckleConverter.cs

@@ -60,13 +60,22 @@ public class SegmentCollectionToSpeckleConverter : ITypedConverter<ACG.ReadOnlyS
         {
           foreach (ACG.Segment? subSegment in subSegments)
           {
+            ACG.MapPoint startPt = new ACG.MapPointBuilderEx(
+              subSegment.StartPoint.X,
+              subSegment.StartPoint.Y,
+              subSegment.StartPoint.Z,
+              target.SpatialReference
+            ).ToGeometry();
+            ACG.MapPoint endPt = new ACG.MapPointBuilderEx(
+              subSegment.EndPoint.X,
+              subSegment.EndPoint.Y,
+              subSegment.EndPoint.Z,
+              target.SpatialReference
+            ).ToGeometry();
+
             AddPtsToPolylinePts(
               points,
-              new List<SOG.Point>()
-              {
-                _pointConverter.Convert(subSegment.StartPoint),
-                _pointConverter.Convert(subSegment.EndPoint)
-              }
+              new List<SOG.Point>() { _pointConverter.Convert(startPt), _pointConverter.Convert(endPt) }
             );
           }
         }
@@ -85,14 +94,12 @@ public class SegmentCollectionToSpeckleConverter : ITypedConverter<ACG.ReadOnlyS
     }
 
     // check the last point, remove if coincides with the first. Assign as Closed instead
-    bool closed = false;
     if (
       Math.Round(points[^1].x, 6) == Math.Round(points[0].x, 6)
       && Math.Round(points[^1].y, 6) == Math.Round(points[0].y, 6)
       && Math.Round(points[^1].z, 6) == Math.Round(points[0].z, 6)
     )
     {
-      closed = true;
       points.RemoveAt(points.Count - 1);
     }
 
@@ -100,7 +107,7 @@ public class SegmentCollectionToSpeckleConverter : ITypedConverter<ACG.ReadOnlyS
       new()
       {
         value = points.SelectMany(pt => new[] { pt.x, pt.y, pt.z, }).ToList(),
-        closed = closed,
+        closed = true,
         units = _contextStack.Current.SpeckleUnits
       };