ArcObjects Library Reference (Geometry)

IPoint Interface

Provides access to members that define two dimensional points.

Product Availability

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

Description

A Point is a zero-dimensional object that represents a specific (X, Y) location in a the two-dimensional XY-Plane. A Point may also have Z, M, and ID attributes associated with it. Existence of attributes does not alter the dimensionality of a Point nor does it alter geometric calculations performed on the Point. Attributes are only considered for attribute calculations when the Point is ZAware, MAware, or PointIDAware. Points may be constructed using PutCoords, individually setting the X and Y properties, or using the IConstructPoint interface.

Members

		Description
	Compare	Compares X, Y, M, Z, ID of this point (in that order) with that of the other point. Returns -1 if this point's value is less, 1 if greater, and 0 otherwise. Useful for sorting a group of points.
	ConstrainAngle	Projects this point to the point on the infinite line defined by anchor and angle (in radians). If allowOpposite is true, then the point can also snap to angle + pi radians.
	ConstrainDistance	Projects this point to the perimeter of the circle defined by radius and anchor.
	Dimension	The topological dimension of this geometry.
	Envelope	Creates a copy of this geometry's envelope and returns it.
	GeometryType	The type of this geometry.
	GeoNormalize	Shifts longitudes, if need be, into a continuous range of 360 degrees.
	GeoNormalizeFromLongitude	Normalizes longitudes into a continuous range containing the longitude. This method is obsolete.
	ID	The Point ID attribute.
	IsEmpty	Indicates whether this geometry contains any points.
	M	The measure attribute.
	Project	Projects this geometry into a new spatial reference.
	PutCoords	Sets the X and Y coordinates.
	QueryCoords	Returns the X and Y coordinates.
	QueryEnvelope	Copies this geometry's envelope properties into the specified envelope.
	SetEmpty	Removes all points from this geometry.
	SnapToSpatialReference	Moves points of this geometry so that they can be represented in the precision of the geometry's associated spatial reference system.
	SpatialReference	The spatial reference associated with this geometry.
	X	The X coordinate.
	Y	The Y coordinate.
	Z	The Z attribute.

Inherited Interfaces

Interfaces	Description
IGeometry	Provides access to members that describe properties and behavior of all geometric objects.

CoClasses that implement IPoint

CoClasses and Classes	Description
MapPoint (esriDataSourcesRaster)	Implements interface IMapPoint (a point in map space).
Point	A two dimensional point, optionally with measure, height, and ID attributes.

Remarks

Point Example

.NET Snippets

.NET Samples

Export any network analysis class to a text file (Code Files: NAClassToTextfileCmd) | Curve conversion add-in (Code Files: CurveConversionDockWin) | 3D multipatch examples (Code Files: CompositeExamples DrawUtilities ExtrusionExamples GeometryUtilities Transform3DExamples Vector3DExamples) | Custom map navigation commands (Code Files: Pan PanDown PanLeft PanRight PanUp ZoomIn ZoomOut) | Dynamic logo (Code Files: DynamicLogo) | Dynamic display animated zoom (Code Files: AnimatedZoomInTool AnimatedZoomOutTool) | Dynamic biking (Code Files: DynamicBikingCmd) | 3D dynamic element tracking (Code Files: TrackDynamicObject) | Find an address (Code Files: AddressForm) | Visualizing the camera path while animating (Code Files: VisualizeCameraPath) | Globe Fly tool (Code Files: Fly) | Dynamic display layer (Code Files: MyDynamicLayerClass) | Points along line construction tool (Code Files: PointsAlongLineForm PointsAlongLineTool) | ViperPin tool (Code Files: ViperPinForm ViperPinTool) | Custom map selection commands (Code Files: SelectFeatures) | Tabbed feature inspector (Code Files: TabbedInspector) | Implementing a schematic digitizing tool (Code Files: DigitTool) | Implementing an XML builder external component (Code Files: XMLDocImpl) | Dynamic display—tracking dynamic object (Code Files: TrackObject) | Find the closest intersection from a point (Code Files: FindClosestIntersection) | Edit event listener (Code Files: EventListener) | GraphicTracker with the map (Code Files: AddGT GTMapForm) | Navigating around the GlobeControl (Code Files: Navigation) | Control text symbols using the SymbologyControl (Code Files: TextSymbols) | Angle Angle shape constructor (Code Files: AngleAngleCstr) | Custom vertex editing commands (Code Files: CustomVertexCommands) | Simple dynamic display application (Code Files: MyDynamicLayer) | RSS weather GraphicTracker (Code Files: RSSWeather) | Geoevents in a MapControl (Code Files: GeoEvents) | Move a graphic along a path in ArcMap (Code Files: AnimationUtils MapGraphicKeyframe) | Create custom move, rotate, and scale GeometricEffects within a single project (Code Files: clsGE_Transform_Rotate clsGE_Transform_Scale) | Creating a toolbar of globe tools (Code Files: PointGeometry PolygonGeometry PolylineGeometry) | Buffer snap agent (Code Files: BufferSnap) | Custom scene navigation commands (Code Files: Fly Navigate Pan SelectFeatures SelectGraphics SetObserver TargetCenter TargetZoom ZoomIn ZoomOut) | Building a MapViewer application using the ArcGIS Engine controls (Code Files: AddDateTool) | Custom subtyped command and tool (Code Files: PolyFeedbackTools) | StreetMap routing (Code Files: RoutingForm) | Implementing the ISchematicRulesHelper to easily develop a custom schematic rule (Code Files: BisectorRule) | RSS weather layer (Code Files: AddRSSWeatherLayer AddWeatherItemTool RSSWeatherLayerClass) | Triangle graphic element (Code Files: TriangleElementClass TriangleElementTool) | Clonable object (Code Files: ClonableObjClass) | Custom selection extension (Code Files: SelectByLineTool) | Single line address geocoding (Code Files: SingleLineGeocodingForm) | Create a custom selection extension by extending ArcObjects (Code Files: SelectByLineTool) | Add map surrounds using the SymbologyControl (Code Files: NorthArrows ScaleBars ScaleText) | Create a custom marker placement for placing markers around a point (Code Files: AroundPoint) | Controls commands environment (Code Files: CommandsEnvironment) | Reducing schematic nodes and computing a cumulative attribute via a schematic rule (Code Files: NodeReductionRule) | Draw text on a MapControl (Code Files: DrawText) | Tabbed feature inspector (Code Files: ObjectInspector) | Configure a command for a specific locale (Code Files: CultureTool)

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