SqlGeography 類別

The SqlGeography type represents data in a geodetic (round earth) coordinate system.

繼承階層

System.Object
  Microsoft.SqlServer.Types.SqlGeography

命名空間：  Microsoft.SqlServer.Types
組件：  Microsoft.SqlServer.Types (在 Microsoft.SqlServer.Types.dll 中)

語法

'宣告
<SerializableAttribute> _
<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered := False,  _
    MaxByteSize := , IsFixedLength := False)> _
<CLSCompliantAttribute(True)> _
Public NotInheritable Class SqlGeography _
    Implements INullable, IBinarySerialize, ISqlSpatialGridIndexable
'用途
Dim instance As SqlGeography

[SerializableAttribute]
[SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)]
[CLSCompliantAttribute(true)]
public sealed class SqlGeography : INullable, 
    IBinarySerialize, ISqlSpatialGridIndexable

[SerializableAttribute]
[SqlUserDefinedTypeAttribute(Format::UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)]
[CLSCompliantAttribute(true)]
public ref class SqlGeography sealed : INullable, 
    IBinarySerialize, ISqlSpatialGridIndexable

[<SealedAttribute>]
[<SerializableAttribute>]
[<SqlUserDefinedTypeAttribute(Format.UserDefined, IsByteOrdered = false, 
    MaxByteSize = , IsFixedLength = false)>]
[<CLSCompliantAttribute(true)>]
type SqlGeography =  
    class 
        interface INullable 
        interface IBinarySerialize 
        interface ISqlSpatialGridIndexable 
    end

public final class SqlGeography implements INullable, IBinarySerialize, ISqlSpatialGridIndexable

SqlGeography 型別公開下列成員。

建構函式

	名稱	說明
	SqlGeography	Initializes a new instance of the SqlGeography class.

上層

屬性

	名稱	說明
	HasM	Returns true if at least one point in a spatial object contains value M; otherwise returns false. This property is read-only.
	HasZ	Returns true if at least one point in a spatial object contains value Z; otherwise returns false. This property is read-only.
	IsNull	Determines whether the SqlGeography instance is null.
	Lat	Returns the latitude property of the geography instance.
	Long	Returns the longitude property of the geography instance.
	M	Returns the M (measure) value of the geography instance.
	Null	Returns a read-only property providing a null instance of the SqlGeography type.
	STSrid	Gets or sets id is an integer representing the Spatial Reference Identifier (SRID) of the instance.
	Z	Gets the Z (elevation) value of the instance. The semantics of the elevation value are user-defined.

上層

方法

	名稱	說明
	AsBinaryZM	Returns the Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation of a SqlGeography instance augmented with any Z (elevation) and M (measure) values carried by the instance.
	AsGml	Returns the Geography Markup Language (GML) representation of a SqlGeography instance.
	AsTextZM	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeography instance augmented with any Z (elevation) and M (measure) values carried by the instance.
	BufferWithCurves	Returns a SqlGeography instance that represents the set of all points whose distance from the calling SqlGeography instance is less than or equal to the distance parameter.
	BufferWithTolerance	Returns a geometric object representing the union of all point values whose distance from a SqlGeography instance is less than or equal to a specified value, allowing for a specified tolerance.
	CurveToLineWithTolerance	Returns a polygonal approximation of a SqlGeography instance that contains circular arc segments.
	Deserialize	Returns a constructed SqlGeometry from an internal SQL Server format for spatial data. Can be used for sending spatial data over the network or reading them from files.
	EnvelopeAngle	Returns the maximum angle between the point returned by EnvelopeCenter() and a point in the SqlGeography instance in degrees.
	EnvelopeCenter	Returns a point that can be used as the center of a bounding circle for the geography instance.
	Equals	(繼承自 Object。)
	Filter	Offers a fast, index-only intersection method to determine if a geography instance intersects another SqlGeography instance, assuming an index is available.
	GeomFromGml	Constructs a SqlGeography instance given a representation in the SQL Server subset of the Geography Markup Language (GML).
	GetHashCode	(繼承自 Object。)
	GetType	(繼承自 Object。)
	InstanceOf	Tests if the SqlGeography instance is the same as the specified type.
	IsValidDetailed	Returns a message to help identify validity issues with a spatial object.
	MakeValid	Converts a geography instance that is not valid into a valid geography instance with a valid Open Geospatial Consortium (OGC) type.
	MinDbCompatibilityLevel	Returns the minimum database compatibility that accepts the SqlGeography type.
	NumRings	Returns the total number of rings in a Polygon instance.
	Parse	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation.
	Point	Constructs a SqlGeography instance representing a Point instance from its x and y values and a spatial reference ID (SRID).
	Populate(IGeographySink)	已經過時。Applies a geography type call sequence to IGeographySink object. The call sequence is a set of figures, lines, and points for geography types.
	Populate(IGeographySink110)	Applies a geography type call sequence to IGeographySink object.
	Read	Reads a binary representation of a geography type into a SqlGeometry object.
	Reduce	Returns an approximation of the given geography instance produced by running the Douglas-Peucker algorithm on the instance with the given tolerance.
	ReorientObject	Returns a geography instance with interchanged interior regions and exterior regions.
	RingN	Returns the specified ring of the SqlGeography instance: 1 ≤ n ≤ NumRings().
	Serialize	Used for sending spatial data across the network.
	ShortestLineTo	Returns the shortest distance between the two SqlGeographyinstances.
	STArea	Returns the total surface area of a SqlGeography instance.
	STAsBinary	Returns the Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation of a SqlGeography instance.
	STAsText	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeography instance.
	STBuffer	Returns a geography object that represents the union of all points whose distance from a SqlGeography instance is less than or equal to a specified value.
	STContains	Specifies whether the calling SqlGeography instance spatially contains the SqlGeography instance passed to the method.
	STConvexHull	Returns an object that represents the convex hull of a SqlGeography instance.
	STCurveN	Returns the curve specified from a SqlGeography instance that is a LineString, CircularString, or CompoundCurve.
	STCurveToLine	Returns a polygonal approximation of a SqlGeography instance that contains circular arc segments.
	STDifference	Returns an object representing the points from one SqlGeography instance that do not lie within another SqlGeography instance.
	STDimension	Returns the maximum dimension of a SqlGeography instance
	STDisjoint	Determines whether the calling SqlGeography instance is spatially disjoint from the specified SqlGeography instance.
	STDistance	Returns the shortest distance between a point in a SqlGeography instance and a point in another SqlGeography instance.
	STEndPoint	Returns the end point of a SqlGeography instance.
	STEquals	Determines whether the specified SqlGeography instance has the same point set as the calling SqlGeography instance.
	STGeomCollFromText	Returns a geography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STGeomCollFromWKB	Returns a GeometryCollection instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STGeometryN	Returns a specified geography element in a GeometryCollection or one of its subtypes.
	STGeometryType	Returns the Open Geospatial Consortium (OGC) type name represented by a geography instance.
	STGeomFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STGeomFromWKB	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STIntersection	Returns an object representing the points where a SqlGeography instance intersects another SqlGeography instance.
	STIntersects	Determines whether the current SqlGeography instance intersects with the specified SqlGeography.
	STIsClosed	Determines whether the calling SqlGeography instance is closed.
	STIsEmpty	Determines whether the SqlGeography instance is empty.
	STIsValid	Specifies whether a geography instance is well-formed and recognized as a valid geography object based on its Open Geospatial Consortium (OGC) type.
	STLength	Returns the total length of the elements in a SqlGeography instance or the SqlGeography instances within a GeometryCollection.
	STLineFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STLineFromWKB	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMLineFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMLineFromWKB	Returns a SqlGeography MultiLineString instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STMPointFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMPointFromWKB	Returns a SqlGeography MultiPoint instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STMPolyFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STMPolyFromWKB	Returns a SqlGeography MultiPolygon instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STNumCurves	Returns the number of curves in a one-dimensional SqlGeography instance.
	STNumGeometries	Returns the number of geometries that make up a SqlGeography instance.
	STNumPoints	Returns the total number of points in each of the figures in a SqlGeography instance
	STOverlaps	Returns 1 if a SqlGeography instance spatially overlaps another SqlGeography instance, or 0 if it does not.
	STPointFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation, augmented with any Z (elevation) and M (measure) values carried by the instance.
	STPointFromWKB	Returns a SqlGeography Point instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STPointN	Returns the specified point in a SqlGeography instance.
	STPolyFromText	Returns a SqlGeography instance from an Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation augmented with any Z (elevation) and M (measure) values carried by the instance.
	STPolyFromWKB	Returns a SqlGeography Polygon instance from an Open Geospatial Consortium (OGC) Well-Known Binary (WKB) representation.
	STStartPoint	Returns the start point of a SqlGeography instance.
	STSymDifference	Returns an object representing all points that are either in one SqlGeography instance or another SqlGeography instance, but not those points that lie in both instances.
	STUnion	Returns an object representing the union of a SqlGeography instance with another SqlGeography instance.
	STWithin	Returns 1 if a SqlGeography instance is spatially within another SqlGeography instance; otherwise, returns 0.
	ToString	Returns the Open Geospatial Consortium (OGC) Well-Known Text (WKT) representation of a SqlGeography instance augmented with any Z (elevation) and M (measure) values carried by the instance. (覆寫 Object.ToString()。)
	Write	Writes a SqlGeography object to a binary stream.

上層

明確 繼承 實作

	名稱	說明
	ISqlSpatialGridIndexable.BufferForDistanceQuery	Returns the buffer for distance query for the SQL Geography.
	ISqlSpatialGridIndexable.GetBoundingBoxCorners	Returns a value for the bounding box corners for the SQL Geography.
	ISqlSpatialGridIndexable.GetGridCoverage	Returns the grid coverage of the SQL Geography.
	ISqlSpatialGridIndexable.InteriorBufferForDistanceQuery	Gets the interior buffer for distance query for the SQL Geography.

上層

備註

SQL Server supports a set of methods for the geography spatial data type. These methods include methods on geography that are defined by the Open Geospatial Consortium (OGC) standard and a set of Microsoft extensions to that standard.

執行緒安全性

這個型別的任何公用 static (在 Visual Basic 中為 Shared) 成員都是執行緒安全的。並不是所有的執行個體成員都保證可以用於所有的執行緒。

請參閱

參考

Microsoft.SqlServer.Types 命名空間