Example usage for com.google.common.geometry S2LatLngRect S2LatLngRect

Introduction

In this page you can find the example usage for com.google.common.geometry S2LatLngRect S2LatLngRect.

Prototype

public S2LatLngRect(R1Interval lat, S1Interval lng) 

Source Link

Document

Construct a rectangle from latitude and longitude intervals.

Usage

From source file:com.grublr.geo.s2.internal.S2Util.java

/**
 * An utility method to get a bounding box of latitude and longitude from a given GeoQueryRequest.
 * /* w w  w .ja  v a  2 s. co  m*/
 * @param geoQueryRequest
 *            It contains all of the necessary information to form a latitude and longitude box.
 * 
 * */
public static S2LatLngRect getBoundingLatLngRect(GeoQueryRequest geoQueryRequest) {
    if (geoQueryRequest instanceof QueryRectangleRequest) {
        QueryRectangleRequest queryRectangleRequest = (QueryRectangleRequest) geoQueryRequest;

        GeoPoint minPoint = queryRectangleRequest.getMinPoint();
        GeoPoint maxPoint = queryRectangleRequest.getMaxPoint();

        S2LatLngRect latLngRect = null;

        if (minPoint != null && maxPoint != null) {
            S2LatLng minLatLng = S2LatLng.fromDegrees(minPoint.getLatitude(), minPoint.getLongitude());
            S2LatLng maxLatLng = S2LatLng.fromDegrees(maxPoint.getLatitude(), maxPoint.getLongitude());

            latLngRect = new S2LatLngRect(minLatLng, maxLatLng);
        }

        return latLngRect;
    } else if (geoQueryRequest instanceof QueryRadiusRequest) {
        QueryRadiusRequest queryRadiusRequest = (QueryRadiusRequest) geoQueryRequest;

        GeoPoint centerPoint = queryRadiusRequest.getCenterPoint();
        double radiusInMeter = queryRadiusRequest.getRadiusInMeter();

        S2LatLng centerLatLng = S2LatLng.fromDegrees(centerPoint.getLatitude(), centerPoint.getLongitude());

        double latReferenceUnit = centerPoint.getLatitude() > 0.0 ? -1.0 : 1.0;
        S2LatLng latReferenceLatLng = S2LatLng.fromDegrees(centerPoint.getLatitude() + latReferenceUnit,
                centerPoint.getLongitude());
        double lngReferenceUnit = centerPoint.getLongitude() > 0.0 ? -1.0 : 1.0;
        S2LatLng lngReferenceLatLng = S2LatLng.fromDegrees(centerPoint.getLatitude(),
                centerPoint.getLongitude() + lngReferenceUnit);

        double latForRadius = radiusInMeter / centerLatLng.getEarthDistance(latReferenceLatLng);
        double lngForRadius = radiusInMeter / centerLatLng.getEarthDistance(lngReferenceLatLng);

        S2LatLng minLatLng = S2LatLng.fromDegrees(centerPoint.getLatitude() - latForRadius,
                centerPoint.getLongitude() - lngForRadius);
        S2LatLng maxLatLng = S2LatLng.fromDegrees(centerPoint.getLatitude() + latForRadius,
                centerPoint.getLongitude() + lngForRadius);

        return new S2LatLngRect(minLatLng, maxLatLng);
    }

    return null;
}

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