// node coordinates
var coord3D = node.Coordinate3D;
var mapPoint = node.ToMapPoint();
// is the node "inside"
var isInsideNode = node.IsInsideDataArea;
// get all other nodes connected to "node"
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinNode> adjNodes = node.GetAdjacentNodes();
// get all edges that share "node" as a from node.
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinEdge> edges = node.GetIncidentEdges();
// get all triangles that share "node"
IReadOnlyList<ArcGIS.Core.Data.Analyst3D.TinTriangle> triangles = node.GetIncidentTriangles();