Package org.apache.sedona.core.spatialPartitioning

Class HilbertPartitioning

java.lang.Object

org.apache.sedona.core.spatialPartitioning.HilbertPartitioning

All Implemented Interfaces:

Serializable

public class HilbertPartitioning
extends Object
implements Serializable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected int[]	splits	The splits.

Constructor Summary

Constructors

Constructor	Description
HilbertPartitioning(List<org.locationtech.jts.geom.Envelope> samples, org.locationtech.jts.geom.Envelope boundary, int partitions)	Instantiates a new hilbert partitioning.

Method Summary

Modifier and Type	Method	Description
static int	computeHValue(int n, int x, int y)	Compute H value.
protected void	createFromHValues(int[] hValues, int partitions)	Creates the from H values.
List<org.locationtech.jts.geom.Envelope>	getGrids()	Gets the grids.
int[]	getPartitionBounds()	Gets the partition bounds.
static int	gridID(org.locationtech.jts.geom.Envelope boundary, org.locationtech.jts.geom.Envelope spatialObject, int[] partitionBounds)	Grid ID.
static int	locationMapping(double axisMin, double axisLocation, double axisMax)	Location mapping.
static org.locationtech.jts.geom.Envelope	updateEnvelope(org.locationtech.jts.geom.Envelope envelope, org.locationtech.jts.geom.Envelope spatialObject)	Update envelope.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

splits

protected int[] splits

The splits.

Constructor Detail

HilbertPartitioning

public HilbertPartitioning(List<org.locationtech.jts.geom.Envelope> samples,
                           org.locationtech.jts.geom.Envelope boundary,
                           int partitions)
                    throws Exception

Instantiates a new hilbert partitioning.

Parameters:

samples - the sample list

boundary - the boundary

partitions - the partitions

Throws:

Exception - the exception

Method Detail

computeHValue

public static int computeHValue(int n,
                                int x,
                                int y)

Compute H value.

Parameters:

n - the n

x - the x

y - the y

Returns:

the int

locationMapping

public static int locationMapping(double axisMin,
                                  double axisLocation,
                                  double axisMax)

Location mapping.

Parameters:

axisMin - the axis min

axisLocation - the axis location

axisMax - the axis max

Returns:

the int

gridID

public static int gridID(org.locationtech.jts.geom.Envelope boundary,
                         org.locationtech.jts.geom.Envelope spatialObject,
                         int[] partitionBounds)
                  throws Exception

Grid ID.

Parameters:

boundary - the boundary

spatialObject - the spatial object

partitionBounds - the partition bounds

Returns:

the int

Throws:

Exception - the exception

updateEnvelope

public static org.locationtech.jts.geom.Envelope updateEnvelope(org.locationtech.jts.geom.Envelope envelope,
                                                                org.locationtech.jts.geom.Envelope spatialObject)
                                                         throws Exception

Update envelope.

Parameters:

envelope - the envelope

spatialObject - the spatial object

Returns:

the envelope

Throws:

Exception - the exception

createFromHValues

protected void createFromHValues(int[] hValues,
                                 int partitions)

Creates the from H values.

Parameters:

hValues - the h values

partitions - the partitions

getPartitionBounds

public int[] getPartitionBounds()

Gets the partition bounds.

Returns:

the partition bounds

getGrids

public List<org.locationtech.jts.geom.Envelope> getGrids()

Gets the grids.

Returns:

the grids