Class RawCoordinateSequence

An implementation of CoordinateSequence that packs its contents in a way that can be customized by the creator.

Inheritance
object
CoordinateSequence
RawCoordinateSequence
Implements
Inherited Members
Namespace: NetTopologySuite.Geometries.Implementation
Assembly: NetTopologySuite.dll
Syntax
[Serializable]
public sealed class RawCoordinateSequence : CoordinateSequence, ISerializable

Constructors

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RawCoordinateSequence(Memory<double>[], (int RawDataIndex, int DimensionIndex)[], int)

Initializes a new instance of the RawCoordinateSequence class.

Declaration
public RawCoordinateSequence(Memory<double>[] rawData, (int RawDataIndex, int DimensionIndex)[] dimensionMap, int measures)
Parameters
Type Name Description
Memory<double>[] rawData

Contains the raw data for this sequence.
(int RawDataIndex, int DimensionIndex)[] dimensionMap

Contains a pair of indexes to tell us, for each dimension, where to find its data in rawData.
int measures

The value for Measures.

Methods

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Copy()

Returns a deep copy of this collection.

Declaration
public override CoordinateSequence Copy()
Returns
Type Description
CoordinateSequence

A copy of the coordinate sequence containing copies of all points
Overrides
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ExpandEnvelope(Envelope)

Expands the given Envelope to include the coordinates in the sequence. Allows implementing classes to optimize access to coordinate values.

Declaration
public override Envelope ExpandEnvelope(Envelope env)
Parameters
Type Name Description
Envelope env

The envelope to expand.
Returns
Type Description
Envelope

A reference to the expanded envelope.
Overrides
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GetOrdinate(int, int)

Returns the ordinate of a coordinate in this sequence. Ordinate indices 0 and 1 are assumed to be X and Y.

Ordinate indices greater than 1 have user-defined semantics (for instance, they may contain other dimensions or measure values as described by Dimension and Measures.
Declaration
public override double GetOrdinate(int index, int ordinateIndex)
Parameters
Type Name Description
int index

The coordinate index in the sequence.
int ordinateIndex

The ordinate index in the coordinate (in range [0, dimension-1]).
Returns
Type Description
double

The ordinate value, or NullOrdinate if the sequence does not provide values for ordinateIndex"/>
Overrides
Remarks

If the sequence does not provide value for the required ordinate, the implementation must not throw an exception, it should return NullOrdinate.

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GetRawCoordinatesAndStride(int)

Gets the underlying Memory<T> for the ordinates at the given index, along with a "stride" value that represents how many slots there are between elements.

Declaration
public (Memory<double> Array, int Stride) GetRawCoordinatesAndStride(int ordinateIndex)
Parameters
Type Name Description
int ordinateIndex

The index of the ordinate whose values to get, from TryGetOrdinateIndex(Ordinate, out int).
Returns
Type Description
(Memory<double> Array, int Stride)

The underlying Memory<T> and stride.
Remarks

Assuming Count is nonzero, the first element of the returned array holds the first coordinate's value for the requested ordinate, and the last element of the returned array holds the last coordinate's value for the requested ordinate.

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Reversed()

Returns a reversed copy of this CoordinateSequence.

Declaration
public override CoordinateSequence Reversed()
Returns
Type Description
CoordinateSequence

A reversed copy of this CoordinateSequence.
Overrides
Exceptions
Type Condition
InvalidOperationException

Thrown when Copy() returned null.
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SetOrdinate(int, int, double)

Sets the value for a given ordinate of a coordinate in this sequence.

Declaration
public override void SetOrdinate(int index, int ordinateIndex, double value)
Parameters
Type Name Description
int index

The coordinate index in the sequence.
int ordinateIndex

The ordinate index in the coordinate (in range [0, dimension-1]).
double value

The new ordinate value.
Overrides
Remarks

If the sequence can't store the ordinate value, the implementation must not throw an exception, it should simply ignore the call.

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ToCoordinateArray()

Returns (possibly copies of) the Coordinates in this collection. Whether or not the Coordinates returned are the actual underlying Coordinates or merely copies depends on the implementation. Note that if this implementation does not store its data as an array of Coordinates, this method will incur a performance penalty because the array needs to be built from scratch.

Declaration
public override Coordinate[] ToCoordinateArray()
Returns
Type Description
Coordinate[]
Overrides

Implements

Extension Methods