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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 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.
package org.apache.lucene.spatial.tier.projections;

Based on Sinusoidal Projections Project a latitude / longitude on a 2D cartesian map

NOTE: This API is still in flux and might change in incompatible ways in the next release.

public class SinusoidalProjector implements IProjector {
  public String coordsAsString(double latitudedouble longitude) {
    return null;
  public double[] coords(double latitudedouble longitude) {
    double rlat = Math.toRadians(latitude);
    double rlong = Math.toRadians(longitude);
    double nlat = rlong * Math.cos(rlat);
    double r[] = {nlatrlong};
    return r;
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