 geo_point field does not support GeoJson which can be a PITA if your data is in such a format. Indexing it as a geo_shape is an option but very wasteful.
server/src/main/java/org/elasticsearch/common/geo/GeoUtils.java
* <p>
     * Note: A shift of 180&deg; is applied in the longitude if necessary,
     * in order to normalize properly the latitude.
     *
     * @param point The point to normalize in-place.
     */
    public static void normalizePoint(GeoPoint point) {
        normalizePoint(point, true, true);
    }
    /**
     * Normalize the geo {@code Point} for the given coordinates to lie within
     * their respective normalized ranges.
     * <p>
     * You can control which coordinate gets normalized with the two flags.
     * <p>
     * Note: A shift of 180&deg; is applied in the longitude if necessary,
     * in order to normalize properly the latitude.
     * If normalizing latitude but not longitude, it is assumed that
     * the longitude is in the form x+k*360, with x in ]-180;180],
     * and k is meaningful to the application.
     * Therefore x will be adjusted while keeping k preserved.
     *
     * @param point   The point to normalize in-place.
     * @param normLat Whether to normalize latitude or leave it as is.
     * @param normLon Whether to normalize longitude.
     */
    public static void normalizePoint(GeoPoint point, boolean normLat, boolean normLon) {
        double[] pt = { point.lon(), point.lat() };
        normalizePoint(pt, normLon, normLat);
        point.reset(pt[1], pt[0]);