ArcObjects Library Reference  (Geometry)    

Point CoClass

A two dimensional point, optionally with measure, height, and ID attributes.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Extended Error Information

Use the ISupportErrorInfo method InterfaceSupportsErrorInfo to determine if the object supports extended error information. If the object supports extended error info, VC++ developers should use the OLE/COM IErrorInfo interface to access the ErrorInfo object. Visual Basic developers should use the global error object Err to retrieve this extended error information.

Interfaces

Interfaces Description
IClone (esriSystem) Provides access to members that control cloning of objects.
IConstructPoint Provides access to members that construct a point using other geometries and measures.
IConstructPoint2 Provides access to additional point construction methods.
IConversionMGRS Provides access to members that allow the use of MGRS.
IGeometry Provides access to members that describe properties and behavior of all geometric objects.
IGeometry2 Provides access to members that extend the IGeometry interface with a more sophisticated projection method.
IGeometry3 Provides rapid access to a geometry's extent in the x-y plane.
IGeometry4 Provides access to methods that indicate if a geometry has been changed (edited, projected, etc).
IGeometry5 Provides access to members that extend the IGeometry interface with a more sophisticated projection method.
IHitTest Provides access to members that locate a part of a geometry closest to a point.
IMAware Indicator interface that identifies geometric objects that can have persistent M values attached to their vertices.
IMSnap Provides access to a method that snaps ms of the geometry to the precision of the spatial reference associated with the geometry.
IPersist Defines the single method GetClassID, which is designed to supply the CLSID of an object that can be stored persistently in the system. IPersist is the base interface for three other interfaces: IPersistStorage, IPersistStream, and IPersistFile.
IPersistStream (esriSystem)
IPoint Provides access to members that define two dimensional points.
IPointIDAware Indicator interface that identifies geometries that can have persistent point ID values attached to coordinates.
IProximityOperator Provides access to members that find the distance between two geometries. Not currently implemented for geometries containing elliptic arcs.
IProximityOperator3D Provides access to members that find the distance between two geometries with Zs.
IRelationalOperator Provides access to members that determine if a certain spatial relationship exists between two geometries.
IRelationalOperator3D Provides access to members that determine if a certain spatial relationship exists between two geometries with Zs.
ISupportErrorInfo Indicates whether a specific interface can return Automation error objects.
ITopologicalOperator Provides access to members for constructing new geometries based upon topological relationships between existing geometries.
ITransform2D Provides access to methods for transforming geometries using either specific parameters or arbitrary transformation objects (affine transformations, geographic transformations, etc.).
ITransform3D Provides access to methods for transforming 3D geometries using either specific parameters or arbitrary transformation objects.
IXMLSerialize (esriSystem) Provides access to members that XML serialize and deserialize an object to/from XML.
IZAware Indicator interface that identifies geometries that can have persistent Z values attached to their vertices.
[C#]

 

        public static IGeometry GetPointGeometry()

        {

            const double Min = -10;

            const double Max = 10;

 

            Random random = new Random();

 

            double x = Min + (Max - Min) * random.NextDouble();

            double y = Min + (Max - Min) * random.NextDouble();

            double z = Min + (Max - Min) * random.NextDouble();

 

            IPoint point = ConstructPoint3D(x, y, z);

 

            MakeZAware(point as IGeometry);

 

            return point as IGeometry;

        }

 

        private static IPoint ConstructPoint3D(double x, double y, double z)

        {

            IPoint point = ConstructPoint2D(x, y);

            point.Z = z;

           
return point;

        }


        private static IPoint ConstructPoint2D(double x, double y)

        {

            IPoint point = new PointClass();

            point.PutCoords(x, y);
 

            return point;

        }

        private static void MakeZAware(IGeometry geometry)

        {

            IZAware zAware = geometry as IZAware;

            zAware.ZAware = true;

        }