ST_Curve type

Syntax

ST_Curve type

Members

All members of the ST_Curve type, including all inherited members.

Members of ST_Curve:

• ST_CurveToLine() – Returns the ST_LineString interpolation of an ST_Curve value.
• ST_EndPoint() – Returns an ST_Point value that is the end point of the ST_Curve value.
• ST_IsClosed() – Test if the ST_Curve value is closed. A curve is closed if the start and end points are coincident.
• ST_IsRing() – Tests if the ST_Curve value is a ring. A curve is a ring if it is closed and simple (no self intersections).
• ST_Length(VARCHAR(128)) – Returns the length measurement of the ST_Curve value. The result is measured in the units specified by the unit-name parameter.
• ST_StartPoint() – Returns an ST_Point value that is the start point of the ST_Curve value.

Members of ST_Geometry:

• ST_Affine(DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE, DOUBLE) – Returns a new geometry that is the result of applying the specified 3-D affine transformation.
• ST_AsBinary(VARCHAR(128)) – Returns the WKB representation of an ST_Geometry value.
• ST_AsBitmap(INT, INT, ST_Point , ST_Point , VARCHAR(128)) – Returns a LONG VARBIT that is a bitmap representing a geometry value.
• ST_AsGeoJSON(VARCHAR(128)) – Returns a string representing a geometry in JSON format.
• ST_AsGML(VARCHAR(128)) – Returns the GML representation of an ST_Geometry value.
• ST_AsKML(VARCHAR(128)) – Returns the KML representation of an ST_Geometry value.
• ST_AsSVG(VARCHAR(128)) – Returns an SVG figure representing a geometry value.
• ST_AsSVGAggr( ST_Geometry , VARCHAR(128)) – Returns a complete or partial SVG document which renders the geometries in a group.
• ST_AsText(VARCHAR(128)) – Returns the text representation of an ST_Geometry value.
• ST_AsWKB(VARCHAR(128)) – Returns the WKB representation of an ST_Geometry value.
• ST_AsWKT(VARCHAR(128)) – Returns the WKT representation of an ST_Geometry value.
• ST_AsXML(VARCHAR(128)) – Returns the XML representation of an ST_Geometry value.
• ST_Boundary() – Returns the boundary of the geometry value.
• ST_Buffer(DOUBLE, VARCHAR(128)) – Returns the ST_Geometry value that represents all points whose distance from any point of an ST_Geometry value is less than or equal to a specified distance in the given units.
• ST_Contains( ST_Geometry ) – Tests if a geometry value spatially contains another geometry value.
• ST_ContainsFilter( ST_Geometry ) – An inexpensive test if a geometry might contain another.
• ST_ConvexHull() – Returns the convex hull of the geometry value.
• ST_ConvexHullAggr( ST_Geometry ) – Returns the convex hull for all of the geometries in a group
• ST_CoordDim() – Returns the number of coordinate dimensions stored with each point of the ST_Geometry value.
• ST_CoveredBy( ST_Geometry ) – Tests if a geometry value is spatially covered by another geometry value.
• ST_CoveredByFilter( ST_Geometry ) – An inexpensive test if a geometry might be covered by another.
• ST_Covers( ST_Geometry ) – Tests if a geometry value spatially covers another geometry value.
• ST_CoversFilter( ST_Geometry ) – An inexpensive test if a geometry might cover another.
• ST_Crosses( ST_Geometry ) – Tests if a geometry value crosses another geometry value.
• ST_Debug(VARCHAR(128)) – Returns a LONG BINARY that is debug information for the object.
• ST_Difference( ST_Geometry ) – Returns the geometry value that represents the point set difference of two geometries.
• ST_Dimension() – Returns the dimension of the ST_Geometry value. Points have dimension 0, lines have dimension 1, and surfaces have dimension 2. Any empty geometry has dimension -1.
• ST_Disjoint( ST_Geometry ) – Test if a geometry value is spatially disjoint from another value.
• ST_Distance( ST_Geometry , VARCHAR(128)) – Returns the smallest distance between the geometry-expression and the specified geometry value.
• ST_Distance_Spheroid( ST_Geometry , VARCHAR(128)) – Calculates the linear distance between geometries on the surface of the Earth.
• ST_Envelope() – Returns the bounding rectangle for the geometry value.
• ST_EnvelopeAggr( ST_Geometry ) – Returns the bounding rectangle for all of the geometries in a group
• ST_Equals( ST_Geometry ) – Tests if an ST_Geometry value is spatially equal to another ST_Geometry value.
• ST_EqualsFilter( ST_Geometry ) – An inexpensive test if a geometry is equal to another.
• ST_GeometryType() – Returns the name of the type of the ST_Geometry value.
• ST_GeometryTypeFromBaseType(VARCHAR(128)) – Parses a string defining the type string.
• ST_GeomFromBinary(LONG BINARY, INT) – Constructs a geometry from a binary string representation.
• ST_GeomFromShape(LONG BINARY[, INT]) – Parses a string containing an ESRI shape record and creates a geometry value of the appropriate type.
• ST_GeomFromText(LONG VARCHAR, INT) – Constructs a geometry from a character string representation.
• ST_GeomFromWKB(LONG BINARY, INT) – Parse a string containing a WKB or EWKB representation of a geometry and creates a geometry value of the appropriate type.
• ST_GeomFromWKT(LONG VARCHAR, INT) – Parses a string containing the WKT or EWKT representation of a geometry and create a geometry value of the appropriate type.
• ST_Intersection( ST_Geometry ) – Returns the geometry value that represents the point set intersection of two geometries.
• ST_IntersectionAggr( ST_Geometry ) – Returns the spatial intersection of all of the geometries in a group
• ST_Intersects( ST_Geometry ) – Test if a geometry value spatially intersects another value.
• ST_IntersectsFilter( ST_Geometry ) – An inexpensive test if the two geometries might intersect.
• ST_IntersectsRect( ST_Point , ST_Point ) – Test if a geometry intersects a rectangle.
• ST_Is3D() – Determines if the geometry value has Z coordinate values.
• ST_IsEmpty() – Determines whether the geometry value represents an empty set.
• ST_IsMeasured() – Determines if the geometry value has associated measure values.
• ST_IsSimple() – Determines whether the geometry value is simple (containing no self intersections or other irregularities).
• ST_IsValid() – Determines whether the geometry is a valid spatial object.
• ST_LatNorth() – Retrieves the northernmost latitude of a geometry.
• ST_LatSouth() – Retrieves the southernmost latitude of a geometry.
• ST_Length_Spheroid(VARCHAR(128)) – Calculates the linear length of a curve/multicurve on the surface of the Earth.
• ST_LinearHash() – Returns a binary string that is a linear hash of the geometry.
• ST_LinearUnHash(BINARY(32)[, INT]) – Returns a geometry representing the index hash.
• ST_LoadConfigurationData(VARCHAR(128)) – Returns binary configuration data. For internal use only.
• ST_LocateAlong(DOUBLE) – Returns the subset of the geometry value that is associated with the given measure value.
• ST_LocateBetween(DOUBLE, DOUBLE) – Returns the subset of the geometry value that is between the specified start measure and end measure.
• ST_LongEast() – Retrieves the longitude of the eastern boundary of a geometry.
• ST_LongWest() – Retrieves the longitude of the western boundary of a geometry.
• ST_MMax() – Retrieves the maximum M coordinate value of a geometry.
• ST_MMin() – Retrieves the minimum M coordinate value of a geometry.
• ST_OrderingEquals( ST_Geometry ) – Tests if a geometry is identical to another geometry.
• ST_Overlaps( ST_Geometry ) – Tests if a geometry value overlaps another geometry value.
• ST_Relate( ST_Geometry ) – Determines how a geometry value is spatially related to another geometry value by returning an intersection matrix. The ST_Relate method returns a 9-character string from the Dimensionally Extended 9 Intersection Model (DE-9IM) to describe the pair-wise relationship between two spatial data items. For example, the ST_Relate method determines if an intersection occurs between the geometries, and the geometry of the resulting intersection, if it exists.
• ST_Reverse() – Returns the geometry with the element order reversed.
• ST_Segmentize(DOUBLE) – Add points so that no line segment is longer than a specified distance.
• ST_Simplify(DOUBLE) – Remove points from curves so long as the maximum introduced error is less than a specified tolerance.
• ST_SnapToGrid( ST_Point , DOUBLE, DOUBLE, DOUBLE, DOUBLE) – Returns a copy of the geometry with all points snapped to the specified grid.
• ST_SRID(INT) – Changes the spatial reference system associated with the geometry without modifying any of the values.
• ST_SRIDFromBaseType(VARCHAR(128)) – Parses a string defining the type string.
• ST_SymDifference( ST_Geometry ) – Returns the geometry value that represents the point set symmetric difference of two geometries.
• ST_ToCircular() – Convert the geometry to a circularstring
• ST_ToCompound() – Converts the geometry to a compound curve.
• ST_ToCurve() – Converts the geometry to a curve.
• ST_ToCurvePoly() – Converts the geometry to a curve polygon.
• ST_ToGeomColl() – Converts the geometry to a geometry collection.
• ST_ToLineString() – Converts the geometry to a linestring.
• ST_ToMultiCurve() – Converts the geometry to a multicurve value.
• ST_ToMultiLine() – Converts the geometry to a multilinestring value.
• ST_ToMultiPoint() – Converts the geometry to a multi-point value.
• ST_ToMultiPolygon() – Converts the geometry to a multi-polygon value.
• ST_ToMultiSurface() – Converts the geometry to a multi-surface value.
• ST_ToPoint() – Converts the geometry to a point.
• ST_ToPolygon() – Converts the geometry to a polygon.
• ST_ToSurface() – Converts the geometry to a surface.
• ST_Touches( ST_Geometry ) – Tests if a geometry value spatially touches another geometry value.
• ST_Transform(INT) – Creates a copy of the geometry value transformed into the specified spatial reference system.
• ST_Union( ST_Geometry ) – Returns the geometry value that represents the point set union of two geometries.
• ST_UnionAggr( ST_Geometry ) – Returns the spatial union of all of the geometries in a group
• ST_Within( ST_Geometry ) – Tests if a geometry value is spatially contained within another geometry value.
• ST_WithinDistance( ST_Geometry , DOUBLE, VARCHAR(128)) – Test if two geometries are within a specified distance of each other.
• ST_WithinDistanceFilter( ST_Geometry , DOUBLE, VARCHAR(128)) – An inexpensive of whether two geometries might be within a specified distance of each other.
• ST_WithinFilter( ST_Geometry ) – An inexpensive test if a geometry might be within another.
• ST_XMax() – Retrieves the maximum X coordinate value of a geometry.
• ST_XMin() – Retrieves the minimum X coordinate value of a geometry.
• ST_YMax() – Retrieves the maximum Y coordinate value of a geometry.
• ST_YMin() – Retrieves the minimum Y coordinate value of a geometry.
• ST_ZMax() – Retrieves the maximum Z coordinate value of a geometry.
• ST_ZMin() – Retrieves the minimum Z coordinate value of a geometry.

Remarks

The ST_Curve type is a supertype for types representing lines using a sequence of points. Subtypes specify whether the control points are joined using straight segments (ST_LineString), circular segments (ST_CircularString) or a combination (ST_CompoundCurve).The ST_Curve type is not instantiable.An ST_Curve value is simple if it does not intersect itself (except possibly at the end points). If an ST_Curve value does intersect at its endpoints, it is closed. An ST_Curve value that is both simple and closed is called a ring.

Standards and compatibility

SQL/MM (ISO/IEC 13249-3: 2006) 7.1