Package org.h2gis.functions.spatial.earth

Class SunCalc

java.lang.Object

org.h2gis.functions.spatial.earth.SunCalc

public class SunCalc
extends Object

This class is a partial Java port of SunCalc. A BSD-licensed JavaScript library for calculating sun position, sunlight phases (times for sunrise, sunset, dusk, etc.), moon position and lunar phase for the given location and time, created by Vladimir Agafonkin (@mourner) as a part of the SunCalc.net project.

Author:

Erwan Bocher

Method Summary

Modifier and Type	Method	Description
static org.locationtech.jts.geom.Coordinate	getPosition(Date date, double lat, double lng)	Returns the sun position as a coordinate with the following properties x: sun azimuth in radians (direction along the horizon, measured from south to west), e.g.
static boolean	isGeographic(double latitude, double longitude)	Test if the point has valid latitude and longitude coordinates.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getPosition

public static org.locationtech.jts.geom.Coordinate getPosition(Date date,
                                                               double lat,
                                                               double lng)

Returns the sun position as a coordinate with the following properties x: sun azimuth in radians (direction along the horizon, measured from south to west), e.g. 0 is south and Math.PI * 3/4 is northwest. y: sun altitude above the horizon in radians, e.g. 0 at the horizon and PI/2 at the zenith (straight over your head).

Parameters:

date -

lat -

lng -

Returns:

isGeographic

public static boolean isGeographic(double latitude,
                                   double longitude)

Test if the point has valid latitude and longitude coordinates.

Parameters:

latitude -

longitude -

Returns: