Types of Sundials

Sundial home page

Sundials are divided into two main groups:

  1. Altitude dials determine the time from the sun's altitude (the sun's height above the horizon). These dials either have to be correctly oriented to the compass directions or they have to be aligned to the sun.
  2. Azimuth dials determine the time from the hour angle of the sun (the sun's angle on its daily arc). These dials have to be correctly oriented and therefore a magnetic compass is often incorporated in the instrument.

Altitude dials

Azimuth dials

Other Dials

 
 
© Helga Nordhoff
2001-2003