GeoTileUtils (elasticsearch-extend 3.2 API)

java.lang.Object
- org.elasticsearch.search.aggregations.bucket.geogrid.GeoTileUtils

```
public final class GeoTileUtils
extends Object
```
Implements geotile key hashing, same as used by many map tile implementations. The string key is formatted as "zoom/x/y" The hash value (long) contains all three of those values compacted into a single 64bit value: bits 58..63 -- zoom (0..29) bits 29..57 -- X tile index (0..2^zoom) bits 0..28 -- Y tile index (0..2^zoom)

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`checkPrecisionRange(int precision)`	Assert the precision value is within the allowed range, and return it if ok, or throw.
`static long`	`longEncode(double longitude, double latitude, int precision)`	Encode lon/lat to the geotile based long format.
`static long`	`longEncode(String hashAsString)`	Encode a geotile hash style string to a long.
`static String`	`stringEncode(long hash)`	Encode to a geotile string from the geotile based long format

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - checkPrecisionRange
```
public static int checkPrecisionRange(int precision)
```
    Assert the precision value is within the allowed range, and return it if ok, or throw.
  - longEncode
```
public static long longEncode(double longitude,
                              double latitude,
                              int precision)
```
    Encode lon/lat to the geotile based long format. The resulting hash contains interleaved tile X and Y coordinates. The precision itself is also encoded as a few high bits.
  - longEncode
```
public static long longEncode(String hashAsString)
```
    Encode a geotile hash style string to a long.
    
    Parameters:
    
    hashAsString - String in format "zoom/x/y"
    
    Returns:
    
    long encoded value of the given string hash
  - stringEncode
```
public static String stringEncode(long hash)
```
    Encode to a geotile string from the geotile based long format