MyLocation Class Reference

#include <Gps.h>

Public Member Functions
void	clear ()
double	latitude ()
double	longitude ()
String	longitudeString ()
String	latitudeString ()
double	distanceTo (MyLocation &location)
double	courseTo (MyLocation &location)

Static Public Member Functions
static double	distanceBetween (double lat1, double long1, double lat2, double long2)
static double	courseTo (double lat1, double long1, double lat2, double long2)

Protected Attributes
MyDegrees	latitude_
	Latitude.
MyDegrees	longitude_
	Longitude.

Friends
class	MyGps

Detailed Description

Class to store the two gps positions

Definition at line 46 of file Gps.h.

Member Function Documentation

void MyLocation::clear

(

)

Reset the values.

Definition at line 241 of file Gps.h.

References MyDegrees::clear(), latitude_, and longitude_.

Referenced by MyGps::clear().

{
   latitude_.clear();
   longitude_.clear();
}

double MyLocation::courseTo ( double  lat1, double  long1, double  lat2, double  long2  )

static

Calculate the course between two gps positions

Definition at line 274 of file Gps.h.

Referenced by courseTo().

{
   // returns course in degrees (North=0, West=270) from position 1 to position 2,
   // both specified as signed decimal-degrees latitude and longitude.
   // Because Earth is no exact sphere, calculated course may be off by a tiny fraction.
   // Courtesy of Maarten Lamers
   double dlon = radians(long2 - long1);
   lat1 = radians(lat1);
   lat2 = radians(lat2);
   double a1 = sin(dlon) * cos(lat2);
   double a2 = sin(lat1) * cos(lat2) * cos(dlon);
   a2 = cos(lat1) * sin(lat2) - a2;
   a2 = atan2(a1, a2);
   if (a2 < 0.0)
   {
      a2 += TWO_PI;
   }
   return degrees(a2);
}

double MyLocation::courseTo

(

MyLocation &

to

)

Calculate the course to another gps location

Definition at line 325 of file Gps.h.

References courseTo(), latitude(), and longitude().

{
   return courseTo(latitude(), longitude(), to.latitude(), to.longitude());
}

double MyLocation::distanceBetween ( double  lat1, double  long1, double  lat2, double  long2  )

static

Calculate the distance between two gps positions in meter

Definition at line 248 of file Gps.h.

Referenced by distanceTo().

{
   // returns distance in meters between two positions, both specified
   // as signed decimal-degrees latitude and longitude. Uses great-circle
   // distance computation for hypothetical sphere of radius 6372795 meters.
   // Because Earth is no exact sphere, rounding errors may be up to 0.5%.
   // Courtesy of Maarten Lamers
   double delta = radians(long1 - long2);
   double sdlong = sin(delta);
   double cdlong = cos(delta);
   lat1 = radians(lat1);
   lat2 = radians(lat2);
   double slat1 = sin(lat1);
   double clat1 = cos(lat1);
   double slat2 = sin(lat2);
   double clat2 = cos(lat2);
   delta = (clat1 * slat2) - (slat1 * clat2 * cdlong);
   delta = sq(delta);
   delta += sq(clat2 * sdlong);
   delta = sqrt(delta);
   double denom = (slat1 * slat2) + (clat1 * clat2 * cdlong);
   delta = atan2(delta, denom);
   return delta * 6372795;
}

double MyLocation::distanceTo

(

MyLocation &

to

)

Calculate the distance between to another gps location

Definition at line 319 of file Gps.h.

References distanceBetween(), latitude(), and longitude().

Referenced by MyGsmGps::getGps(), and MyGsmGps::getGpsFromGsm().

{
   return distanceBetween(latitude(), longitude(), to.latitude(), to.longitude());
}

double MyLocation::latitude

(

)

Gets the latitude

Definition at line 295 of file Gps.h.

References latitude_, and MyDegrees::value().

Referenced by courseTo(), distanceTo(), MyGsmGps::getGps(), MyGsmGps::getGpsFromGsm(), and latitudeString().

{
   return latitude_.value();
}

String MyLocation::latitudeString

(

)

Returns the latitude as a string

Definition at line 313 of file Gps.h.

References latitude().

Referenced by MyGps::latitudeString().

{
   return String(latitude(), 6);
}

double MyLocation::longitude

(

)

Gets the Longitude

Definition at line 301 of file Gps.h.

References longitude_, and MyDegrees::value().

Referenced by courseTo(), distanceTo(), and longitudeString().

{
   return longitude_.value();
}

String MyLocation::longitudeString

(

)

Returns the longitude as a string

Definition at line 307 of file Gps.h.

References longitude().

Referenced by MyGps::longitudeString().

{
   return String(longitude(), 6);
}

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The documentation for this class was generated from the following file:

• tracker/Gps.h