Projection.java

// License: GPL. Copyright 2007 by Immanuel Scholz and others
package org.openstreetmap.josm.data.projection;

import org.openstreetmap.josm.data.Bounds;
import org.openstreetmap.josm.data.coor.EastNorth;
import org.openstreetmap.josm.data.coor.LatLon;

/**
 * GWT
 *
 * note
 *  for now support one projection only, so most
 *  methods are not needed
 */

/**
 * Classes implementing this are able to convert lat/lon values to
 * planar screen coordinates.
 *
 * @author imi
 */
public interface Projection {
    /**
     * Returns the default zoom scale in pixel per degree ({@see #NavigatableComponent#scale}))
     */
    double getDefaultZoomInPPD();

    /**
     * Convert from lat/lon to northing/easting.
     *
     * @param p     The geo point to convert. x/y members of the point are filled.
     */
    EastNorth latlon2eastNorth(LatLon p);

    /**
     * Convert from norting/easting to lat/lon.
     *
     * @param p     The geo point to convert. lat/lon members of the point are filled.
     */
    LatLon eastNorth2latlon(EastNorth p);

//    /**
//     * Describe the projection converter in one or two words.
//     */
//    String toString();
//
//    /**
//     * Return projection code.
//     */
//    String toCode();
//
//    /**
//     * Get a filename compatible string (for the cache directory)
//     */
//    String getCacheDirectoryName();

    /**
     * Get the bounds of the world
     */
    Bounds getWorldBoundsLatLon();
}