/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* The Spatial Prefix package supports spatial indexing by index-time tokens
* where adding characters to a string gives greater resolution.
*
* Potential Implementations include:
* * http://en.wikipedia.org/wiki/Quadtree
* * http://en.wikipedia.org/wiki/Geohash
* * http://healpix.jpl.nasa.gov/
*/
package org.apache.lucene.spatial.prefix.tree;