Other pictures of sundials are on the Cambridgeshire sundial trail , the East Sussex sundial page, and the Toronto sundial page. A picture of many portable dials is shown on the Sundials in Poland page. Horizontal This is the type found commonly on pedestals in gardens. The dial plate is horizontal. This is the type found on the walls of churches and other buildings.
Equatorial dials have the dial plate fixed in the plane of the equator.
The gnomon is perpendicular to the dial plate. The hour lines are spaced equally at 15 degree intervals. The armillary sphere is a development of this idea, and consists of a series of rings in the planes of the equator and the meridian, and a rod parallel to the earth's axis and passing through the center of the rings. Polar dials have the dial plate fixed parallel with the earths axis. The gnomon is parallel to the dial plate, typically the edge of a rectangular plate fixed to the dial plate.