Lucene example source code file (SinusoidalProjector.java)

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Java - Lucene tags/keywords

deprecated, deprecated, iprojector, iprojector, sinusoidalprojector, sinusoidalprojector, string, string

The Lucene SinusoidalProjector.java source code

/**
 * 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.
 */

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

/**
 * Based on Sinusoidal Projections
 * Project a latitude / longitude on a 2D cartesian map
 * <p/>
 * THIS PROJECTION IS WRONG, but it's not going to be fixed b/c it will break a lot of existing tests, plus we are deprecating
 * most of the existing spatial and replacing with a more reliable approach.
 *
 * <p>NOTE: This API is still in
 * flux and might change in incompatible ways in the next
 * release.</font>
 *
 * @deprecated Until we can put in place proper tests and a proper fix. 
 */
@Deprecated
public class SinusoidalProjector implements IProjector {


  public String coordsAsString(double latitude, double longitude) {
    return null;
  }

  public double[] coords(double latitude, double longitude) {
    double rlat = Math.toRadians(latitude);
    double rlong = Math.toRadians(longitude);
    double nlat = rlong * Math.cos(rlat);
    double r[] = {nlat, rlong};
    return r;
    
  }
  
}

/*
This whole file should really be:*/

/**
 * Based on Sinusoidal Projections
 * Project a latitude / longitude on a 2D cartesian map using the Prime Meridian as the "central meridian"
 *
 * See http://en.wikipedia.org/wiki/Sinusoidal_projection
 *
 * <p>NOTE: This API is still in
 * flux and might change in incompatible ways in the next
 * release.</font>
 */
/*
public class SinusoidalProjector implements IProjector {


  public String coordsAsString(double latitude, double longitude) {
    double [] coords = coords(latitude, longitude);
    return coords[0] + "," + coords[1];
  }

  public double[] coords(double latitude, double longitude) {
    double rlat = latitude * DistanceUtils.DEGREES_TO_RADIANS;
    double rlong = longitude * DistanceUtils.DEGREES_TO_RADIANS;
    double x = rlong * Math.cos(rlat);
    return new double[]{x, rlat};

  }

}
*/