Latitude and longitude for calcHorizontalCoordinates() precision

[Macintosh-Fan]

Of what decimal precision works for the void calcHorizontalCoordinates(unsigned long utc, double latitude, double longitude, double &azimuth, double &elevation) function?

[jpb10]

For the input values of latitude and longitude, use 2 to 4 decimals.

double latitude = 45.55;     // Observer's latitude 
double longitude = -73.633;  // Observer's longitude

[Macintosh-Fan]

Great, thank you! Would 5 decimals still work, or does it only work reliably for up to 4?

[Macintosh-Fan]

Cool, thanks!

[jpb10]

Yes, you can use more decimals and it won't change the results.