DbGeography Class

  • Reference

Definition

Namespace:
System.Data.Entity.Spatial
Assembly:
EntityFramework.dll

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

[System.Runtime.Serialization.DataContract]
[System.Serializable]
public class DbGeography
type DbGeography = class
Public Class DbGeography
Inheritance
Object
DbGeography
Attributes
DataContractAttribute SerializableAttribute

Properties

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 null.</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 null.</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 null.</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 null.</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 null.</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 null.</returns>
Provider

Gets the spatial provider that will be used for operations on this spatial type.
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.

Methods

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(Nullable<Double>)

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(DbGeography)

Computes the difference of this DbGeography value and another DbGeography value.
Disjoint(DbGeography)

Determines whether this DbGeography is spatially disjoint from the specified DbGeography argument.
Distance(DbGeography)

Computes the distance between the closest points in this DbGeography value and another DbGeography value.
ElementAt(Int32)

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 null.</returns>
FromBinary(Byte[], Int32)

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

Creates a new DbGeography value based on the specified well known binary value.
FromGml(String, Int32)

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

Creates a new DbGeography value based on the specified Geography Markup Language (GML) value.
FromText(String, Int32)

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

Creates a new DbGeography value based on the specified well known text value.
GeographyCollectionFromBinary(Byte[], Int32)

Creates a new DbGeography collection value based on the specified well known binary value and coordinate system identifier (SRID).
GeographyCollectionFromText(String, Int32)

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

Computes the intersection of this DbGeography value and another DbGeography value.
Intersects(DbGeography)

Determines whether this DbGeography value spatially intersects the specified DbGeography argument.
LineFromBinary(Byte[], Int32)

Creates a new DbGeography line value based on the specified well known binary value and coordinate system identifier (SRID).
LineFromText(String, Int32)

Creates a new DbGeography line value based on the specified well known text value and coordinate system identifier (SRID).
MultiLineFromBinary(Byte[], Int32)

Returns the multiline value from a binary value.
MultiLineFromText(String, Int32)

Returns the multiline value from a well-known text value.
MultiPointFromBinary(Byte[], Int32)

Returns the multipoint value from a well-known binary value.
MultiPointFromText(String, Int32)

Returns the multipoint value from a well-known text value.
MultiPolygonFromBinary(Byte[], Int32)

Returns the multi polygon value from a well-known binary value.
MultiPolygonFromText(String, Int32)

Returns the multi polygon value from a well-known text value.
PointAt(Int32)

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 null.</returns>
PointFromBinary(Byte[], Int32)

Creates a new DbGeography point value based on the specified well known binary value and coordinate system identifier (SRID).
PointFromText(String, Int32)

Creates a new DbGeography point value based on the specified well known text value and coordinate system identifier (SRID).
PolygonFromBinary(Byte[], Int32)

Creates a new DbGeography polygon value based on the specified well known binary value and coordinate system identifier (SRID).
PolygonFromText(String, Int32)

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

Determines whether this DbGeography is spatially equal to the specified DbGeography argument.
SymmetricDifference(DbGeography)

Computes the symmetric difference of this DbGeography value and another DbGeography value.
ToString()

Returns a string representation of the geography value.
Union(DbGeography)

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

Applies to