# DbGeography Class

**.NET Framework 4.5**

Represents data in a geodetic (round earth) coordinate system.

**Namespace:**System.Data.Spatial

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

The DbGeography type exposes the following members.

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

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

CoordinateSystemId | Gets the identifier associated with the coordinate system. | |

DefaultCoordinateSystemId | Gets the default coordinate system id (SRID) for geography values (WGS 84). | |

Dimension | Gets the dimension of the given DbGeography value or, if the value is a collections, the largest element dimension. | |

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

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

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

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

IsEmpty | Gets a nullable Boolean value indicating whether this DbGeography value is empty. | |

Latitude | Gets the Latitude coordinate of this DbGeography value, if it represents a point. <returns>The Latitude coordinate value of this geography value, if it represents a point; otherwise nullptr.</returns> | |

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

Longitude | Gets the Longitude coordinate of this DbGeography value, if it represents a point. <returns>The Longitude coordinate value of this geography value, if it represents a point; otherwise nullptr.</returns> | |

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

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

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

SpatialTypeName | Gets the spatial type name of the DBGeography. | |

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

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

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

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

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

AsText | Generates the well known text representation of this DbGeography value. Includes only Longitude and Latitude for points. | |

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

Difference | Computes the difference of this DbGeography value and another DbGeography value. | |

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

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

ElementAt | Returns an element of this DbGeography value from a specific position, if it represents a geography collection. <param name="index">The position within this geography value from which the element should be taken.</param><returns>The element in this geography value at the specified position, if it represents a collection of other geography values; otherwise nullptr.</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(array<Byte>) | Creates a new DbGeography value based on the specified well known binary value. | |

FromBinary(array<Byte>, Int32) | Creates a new DbGeography value based on the specified well known binary value and coordinate system identifier (SRID). | |

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

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

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

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

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

GeographyCollectionFromText | Creates a new DbGeography 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.) | |

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

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

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

LineFromText | Creates a new DbGeography 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 text value. | |

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

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

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

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

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

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

SymmetricDifference | Computes the symmetric difference of this DbGeography value and another DbGeography value. | |

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

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

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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