public final class GeoPointDistanceQuery extends GeoPointInBBoxQuery
GeoPointInBBoxQuery
and is implemented using a two phase approach. First,
like GeoPointInBBoxQueryImpl
candidate terms are queried using the numeric ranges based on
the morton codes of the min and max lat/lon pairs that intersect the boundary of the point-radius
circle (see GeoUtils.lineCrossesSphere(double, double, double, double, double, double, double, double, double, double)
. Terms
passing this initial filter are then passed to a secondary postFilter
method that verifies whether the
decoded lat/lon point fall within the specified query distance (see SloppyMath.haversin(double, double, double, double)
.
All morton value comparisons are subject to the same precision tolerance defined in
1.0E-6 and distance comparisons are subject to the accuracy of the
haversine formula (from R.W. Sinnott, "Virtues of the Haversine", Sky and Telescope, vol. 68, no. 2, 1984, p. 159)
Note: This query currently uses haversine which is a sloppy distance calculation (see above reference). For large
queries one can expect upwards of 400m error. Vincenty shrinks this to ~40m error but pays a penalty for computing
using the spheroidModifier and Type | Field and Description |
---|---|
protected double |
centerLat |
protected double |
centerLon |
protected double |
radius |
Constructor and Description |
---|
GeoPointDistanceQuery(String field,
double centerLon,
double centerLat,
double radius)
NOTE: radius is in meters.
|
Modifier and Type | Method and Description |
---|---|
boolean |
equals(Object o) |
double |
getCenterLat() |
double |
getCenterLon() |
double |
getRadius() |
int |
hashCode() |
Query |
rewrite(IndexReader reader) |
String |
toString(String field) |
getField, getMaxLat, getMaxLon, getMinLat, getMinLon
protected final double centerLon
protected final double centerLat
protected final double radius
public GeoPointDistanceQuery(String field, double centerLon, double centerLat, double radius)
public Query rewrite(IndexReader reader)
rewrite
in class GeoPointInBBoxQuery
public boolean equals(Object o)
equals
in class GeoPointInBBoxQuery
public int hashCode()
hashCode
in class GeoPointInBBoxQuery
public String toString(String field)
toString
in class GeoPointInBBoxQuery
public double getCenterLon()
public double getCenterLat()
public double getRadius()
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