Interface IGeometryRef

Defines a geometry instance

Namespace: OSGeo.MapGuide.MaestroAPI.Geometry

Assembly: OSGeo.MapGuide.MaestroAPI.dll

Syntax

public interface IGeometryRef

Properties

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Area

Gets the area of this instance

Declaration

double Area { get; }

Property Value

Type	Description
System.Double

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IsEmpty

Gets whether this instance is empty

Declaration

bool IsEmpty { get; }

Property Value

Type	Description
System.Boolean

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IsSimple

Gets whether this entity is simple or not. Simple entities do not contain any points of self-tangency or self intersection.

Declaration

bool IsSimple { get; }

Property Value

Type	Description
System.Boolean

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IsValid

Gets whether the coordinates given to construct the entity represent a valid Geometry

Declaration

bool IsValid { get; }

Property Value

Type	Description
System.Boolean

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Length

Gets the length of this instance

Declaration

double Length { get; }

Property Value

Type	Description
System.Double

Methods

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AsText()

Gets the well-known text representation of this geometry

Declaration

string AsText()

Returns

Type	Description
System.String

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Contains(IGeometryRef)

Returns true if and only if no points of B lie in the exterior of A, and at least one point of the interior of B lies in the interior of A

Declaration

bool Contains(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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ConvexHull()

Gets the minimum convex geometry that encloses all geometries within the set

Declaration

IGeometryRef ConvexHull()

Returns

Type	Description
IGeometryRef

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Crosses(IGeometryRef)

Returns true if the supplied geometries have some, but not all, interior points in common

Declaration

bool Crosses(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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Difference(IGeometryRef)

Returns a geometry that represents that part of geometry A that does not intersect with geometry B

Declaration

IGeometryRef Difference(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
IGeometryRef

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Disjoint(IGeometryRef)

Returns true if the Geometries do not "spatially intersect" - if they do not share any space together

Declaration

bool Disjoint(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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Equals(IGeometryRef)

Returns true if the given geometries represent the same geometry. Directionality is ignored

Declaration

bool Equals(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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GetCentroid(Boolean)

Gets the centroid of the geometry instance

Declaration

IPoint2D GetCentroid(bool envelope)

Parameters

Type	Name	Description
System.Boolean	envelope	If true, will return the center of the geometry's envelope instead. This is faster for really complex geometries and you only require an approximate center (eg. A point to zoom to)

Returns

Type	Description
IPoint2D

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GetEnvelope()

Gets the envelope of this geometry

Declaration

IEnvelope GetEnvelope()

Returns

Type	Description
IEnvelope

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Intersection(IGeometryRef)

Returns a geometry that represents the point set intersection of this geometry and another

Declaration

IGeometryRef Intersection(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
IGeometryRef

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Intersects(IGeometryRef)

This is a convenience method. Given 2 geometries a and b, a.Intersects(b) is true if and only if a.Disjoint (b) is false.

Declaration

bool Intersects(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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Overlaps(IGeometryRef)

Given 2 geometries a and b, a.Overlaps(b) is true if and only if the dimension of the interior of a equals the dimension of the interior of b equals the dimension of the intersection of the interior of a and the interior of b and the intersection of a and b is neither a nor b

Declaration

bool Overlaps(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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SymmetricDifference(IGeometryRef)

Returns a geometry that represents the point set symmetric difference of this geometry with another

Declaration

IGeometryRef SymmetricDifference(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
IGeometryRef

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Touches(IGeometryRef)

Returns true if the geometries have at least one point in common, but their interiors do not intersect

Declaration

bool Touches(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean

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Union(IGeometryRef)

Returns a geometry that represents the point set union of the Geometries

Declaration

IGeometryRef Union(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
IGeometryRef

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Within(IGeometryRef)

Returns true if the geometry A is completely inside geometry B

Declaration

bool Within(IGeometryRef other)

Parameters

Type	Name	Description
IGeometryRef	other

Returns

Type	Description
System.Boolean