# DbGeometry Class

**.NET Framework 4.5**

Provides a base class for objects that define geometric shapes.

**Namespace:**System.Data.Spatial

**Assembly:**System.Data.Entity (in System.Data.Entity.dll)

The DbGeometry type exposes the following members.

Name | Description | |
---|---|---|

Area | Gets a nullable double value that indicates the area of this DbGeometry value, which may be null if this value does not represent a surface. | |

Boundary | Gets the boundary of the DbGeometry objects. | |

Centroid | Gets the DbGeometry value that represents the centroid of this DbGeometry value, which may be null if this value does not represent a surface. | |

ConvexHull | Gets the convex hull of this DbGeometry value as another DbGeometry value. | |

CoordinateSystemId | Gets the coordinate system identifier of the DbGeometry object. | |

DefaultCoordinateSystemId | Gets the default coordinate system id (SRID) for geometry values. | |

Dimension | Gets the dimension of the given DbGeometry value or, if the value is a collection, the dimension of its largest element. | |

ElementCount | Gets the number of elements in this DbGeometry value, if it represents a geometry collection. <returns>The number of elements in this geometry value, if it represents a collection of other geometry values; otherwise null.</returns> | |

Elevation | Gets the elevation (Z coordinate) of this DbGeometry value, if it represents a point. <returns>The elevation (Z coordinate) of this geometry value, if it represents a point; otherwise null.</returns> | |

EndPoint | Gets a DbGeometry value representing the start point of this value, which may be null if this DbGeometry value does not represent a curve. | |

Envelope | Gets the envelope (minimum bounding box) of this DbGeometry value, as a geometry value. | |

ExteriorRing | Gets the DbGeometry value that represents the exterior ring of this DbGeometry value, which may be null if this value does not represent a polygon. | |

InteriorRingCount | Gets the number of interior rings in this DbGeometry value, if it represents a polygon. <returns>The number of elements in this geometry value, if it represents a polygon; otherwise null.</returns> | |

IsClosed | Gets a nullable Boolean value indicating whether this DbGeometry value is closed, which may be null if this value does not represent a curve. | |

IsEmpty | Gets a nullable Boolean value indicating whether this DbGeometry value is empty, which may be null if this value does not represent a curve. | |

IsRing | Gets a nullable Boolean value indicating whether this DbGeometry value is a ring, which may be null if this value does not represent a curve. | |

IsSimple | Gets a nullable Boolean value indicating whether this DbGeometry value is simple. | |

IsValid | Gets a nullable Boolean value indicating whether this DbGeometry value is valid. | |

Length | Gets a nullable double value that indicates the length of this DbGeometry value, which may be null if this value does not represent a curve. | |

Measure | Gets the Measure (M coordinate) of this DbGeometry value, if it represents a point. <returns>The Measure (M coordinate) value of this geometry value, if it represents a point; otherwise null.</returns> | |

PointCount | Gets the number of points in this DbGeometry value, if it represents a linestring or linear ring. <returns>The number of elements in this geometry value, if it represents a linestring or linear ring; otherwise null.</returns> | |

PointOnSurface | Gets a point on the surface of this DbGeometry value, which may be null if this value does not represent a surface. | |

ProviderValue | Gets a representation of this DbGeometry value that is specific to the underlying provider that constructed it. | |

SpatialTypeName | Gets a spatial type name representation of this DbGeometry value. | |

StartPoint | Gets a DbGeometry value representing the start point of this value, which may be null if this DbGeometry value does not represent a curve. | |

WellKnownValue | Gets or sets a data contract serializable well known representation of this DbGeometry value. | |

XCoordinate | Gets the X coordinate of this DbGeometry value, if it represents a point. <returns>The X coordinate value of this geometry value, if it represents a point; otherwise null.</returns> | |

YCoordinate | Gets the Y coordinate of this DbGeometry value, if it represents a point. <returns>The Y coordinate value of this geometry value, if it represents a point; otherwise null.</returns> |

Name | Description | |
---|---|---|

AsBinary | Generates the well known binary representation of this DbGeometry value. | |

AsGml | Generates the Geography Markup Language (GML) representation of this DbGeometry value. | |

AsText | Generates the well known text representation of this DbGeometry value. Includes only X and Y coordinates for points. | |

Buffer | Returns a geometry object that represents the union of all points whose distance from a geometry instance is less than or equal to a specified value. | |

Contains | Determines whether this DbGeometry value spatially contains the specified DbGeometry argument. | |

Crosses | Determines whether this DbGeometry value spatially crosses the specified DbGeometry argument. | |

Difference | Computes the difference between this DbGeometry value and another DbGeometry value. | |

Disjoint | Determines whether this DbGeometry is spatially disjoint from the specified DbGeometry argument. | |

Distance | Computes the distance between the closest points in this DbGeometry value and another DbGeometry value. | |

ElementAt | Returns an element of this DbGeometry value from a specific position, if it represents a geometry collection. <param name="index">The position within this geometry value from which the element should be taken.</param><returns>The element in this geometry value at the specified position, if it represents a collection of other geometry values; otherwise null.</returns> | |

Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object.) | |

Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) | |

FromBinary(Byte[]) | Creates a new DbGeometry value based on the specified well known binary value. | |

FromBinary(Byte[], Int32) | Creates a new DbGeometry value based on the specified well known binary value and coordinate system identifier (SRID). | |

FromGml(String) | Creates a new DbGeometry value based on the specified Geography Markup Language (GML) value. | |

FromGml(String, Int32) | Creates a new DbGeometry value based on the specified Geography Markup Language (GML) value and coordinate system identifier (SRID). | |

FromText(String) | Creates a new DbGeometry value based on the specified well known text value. | |

FromText(String, Int32) | Creates a new DbGeometry value based on the specified well known text value and coordinate system identifier (SRID). | |

GeometryCollectionFromBinary | Creates a new DbGeometry collection value based on the specified well known binary value and coordinate system identifier (SRID). | |

GeometryCollectionFromText | Creates a new DbGeometry collection value based on the specified well known text value and coordinate system identifier (SRID). | |

GetHashCode | Serves as the default hash function. (Inherited from Object.) | |

GetType | Gets the Type of the current instance. (Inherited from Object.) | |

InteriorRingAt | Returns an interior ring from this DbGeometry value at a specific position, if it represents a polygon. <param name="index">The position within this geometry value from which the interior ring should be taken.</param><returns>The interior ring in this geometry value at the specified position, if it represents a polygon; otherwise null.</returns> | |

Intersection | Computes the intersection of this DbGeometry value and another DbGeometry value. | |

Intersects | Determines whether this DbGeometry value spatially intersects the specified DbGeometry argument. | |

LineFromBinary | Creates a new DbGeometry line value based on the specified well known binary value and coordinate system identifier (SRID). | |

LineFromText | Creates a new DbGeometry line value based on the specified well known text value and coordinate system identifier (SRID). | |

MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) | |

MultiLineFromBinary | Returns the multiline value from a binary value. | |

MultiLineFromText | Returns the multiline value from a well-known text value. | |

MultiPointFromBinary | Returns the multipoint value from a well-known binary value. | |

MultiPointFromText | Returns the multipoint value from a well-known text value. | |

MultiPolygonFromBinary | Returns the multi polygon value from a well-known binary value. | |

MultiPolygonFromText | Returns the multi polygon value from a well-known binary value. | |

Overlaps | Determines whether this DbGeometry value spatially overlaps the specified DbGeometry argument. | |

PointAt | Returns an element of this DbGeometry value from a specific position, if it represents a linestring or linear ring. <param name="index">The position within this geometry value from which the element should be taken.</param><returns>The element in this geometry value at the specified position, if it represents a linestring or linear ring; otherwise null.</returns> | |

PointFromBinary | Creates a new DbGeometry point value based on the specified well known binary value and coordinate system identifier (SRID). | |

PointFromText | Creates a new DbGeometry point value based on the specified well known text value and coordinate system identifier (SRID). | |

PolygonFromBinary | Creates a new DbGeometry polygon value based on the specified well known binary value and coordinate system identifier (SRID). | |

PolygonFromText | Creates a new DbGeometry polygon value based on the specified well known text value and coordinate system identifier (SRID). | |

Relate | Determines whether this DbGeometry value spatially relates to the specified DbGeometry argument according to the given Dimensionally Extended Nine-Intersection Model (DE-9IM) intersection pattern. | |

SpatialEquals | Determines whether this DbGeometry is spatially equal to the specified DbGeometry argument. | |

SymmetricDifference | Computes the symmetric difference between this DbGeometry value and another DbGeometry value. | |

ToString | Returns a string representation of the geometry value. (Overrides Object.ToString().) | |

Touches | Determines whether this DbGeometry value spatially touches the specified DbGeometry argument. | |

Union | Computes the union of this DbGeometry value and another DbGeometry value. | |

Within | Determines whether this DbGeometry value is spatially within the specified DbGeometry argument. |

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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