DK11 for .NET | TatukGIS.NDK.TGIS_Utils.GisSunPosition | Overloads | Methods | Properties
Calculate sun's position based on time, date, and location on Earth
// C# public static void GisSunPosition( TGIS_Point _ptg, TDateTime _local_time, double _utc_offset, ref double _altitude, ref double _azimuth );
' VisualBasic Public Shared Sub GisSunPosition( ByVal _ptg As TGIS_Point, ByVal _local_time As TDateTime, ByVal _utc_offset As Double, ByRef _altitude As Double, ByRef _azimuth As Double )
// Oxygene public class procedure GisSunPosition( _ptg : TGIS_Point; _local_time : TDateTime; _utc_offset : Double; var _altitude : Double; var _azimuth : Double );
Name | Type | Description |
---|---|---|
_ptg | TGIS_Point | observer's location in geographic coordinate system expressed in radians |
_local_time | TDateTime | observer's local time |
_utc_offset | double Double | time difference in hours between UTC and local time for a particular place and date; Daylight Saving Time must be taken into account. |
_altitude | double Double | angular height in radians of the sun in the sky measured from the horizontal; values from 0 at sunrise and sunset to 90 at solar noon (also known as an elevation angle) |
_azimuth | double Double | angle in radians in the horizontal plane measured clockwise from north to the horizontal projection of the sun's rays; values from 0 to 2*Pi |