Class GeohashPrefixTree

A SpatialPrefixTree based on Geohashes. Uses Spatial4n.Util.GeohashUtils to do all the geohash work.

Note

This API is experimental and might change in incompatible ways in the next release.

Inheritance
System.Object
SpatialPrefixTree
GeohashPrefixTree
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
Namespace: Lucene.Net.Spatial.Prefix.Tree
Assembly: Lucene.Net.Spatial.dll
Syntax
public class GeohashPrefixTree : SpatialPrefixTree

Constructors

| Improve this Doc View Source

GeohashPrefixTree(SpatialContext, Int32)

Initializes a new instance of GeohashPrefixTree with the specified spatial context (ctx) and maxLevels.

Declaration
public GeohashPrefixTree(SpatialContext ctx, int maxLevels)
Parameters
Type Name Description
Spatial4n.Context.SpatialContext ctx

The spatial context.
System.Int32 maxLevels

The maximum number of levels in the tree.
Exceptions
Type Condition
System.ArgumentNullException

ctx is null.
System.ArgumentOutOfRangeException

maxLevels is less than or equal to 0 or greater than MaxLevelsPossible.

Properties

| Improve this Doc View Source

MaxLevelsPossible

Any more than this and there's no point (double lat & lon are the same).

Declaration
public static int MaxLevelsPossible { get; }
Property Value
Type Description
System.Int32

Methods

| Improve this Doc View Source

GetCell(IPoint, Int32)

Declaration
protected override Cell GetCell(IPoint p, int level)
Parameters
Type Name Description
Spatial4n.Shapes.IPoint p
System.Int32 level
Returns
Type Description
Cell
Overrides
| Improve this Doc View Source

GetCell(Byte[], Int32, Int32)

Declaration
public override Cell GetCell(byte[] bytes, int offset, int len)
Parameters
Type Name Description
System.Byte[] bytes
System.Int32 offset
System.Int32 len
Returns
Type Description
Cell
Overrides
| Improve this Doc View Source

GetCell(String)

Declaration
public override Cell GetCell(string token)
Parameters
Type Name Description
System.String token
Returns
Type Description
Cell
Overrides
| Improve this Doc View Source

GetLevelForDistance(Double)

Declaration
public override int GetLevelForDistance(double dist)
Parameters
Type Name Description
System.Double dist
Returns
Type Description
System.Int32
Overrides