DK11 for Delphi | GisUtils.TGIS_Utils.GisSunPosition | Overloads | Methods | Properties
Calculate sun's position based on time, date, and location on Earth
// Delphi public class procedure GisSunPosition( const _ptg : TGIS_Point; const _local_time : TDateTime; const _utc_offset : Double; var _altitude : Double; var _azimuth : Double ); overload;
// C++ Builder public: __classmethod void GisSunPosition( TGIS_Point* const _ptg, TDateTime* const _local_time, const double _utc_offset, double &_altitude, double &_azimuth ) /* overload */;
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 | 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 | 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 | 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 |