CHOOSING THE CORRECT SUNDIAL
Horizontal sundials need to have the angle between the gnomon (which casts the shadow) and the dialplate appropriate to the latitude where they are to be used. If you do not know the latitude of your location, you can find it out from the links on our latitude page. The Original Spot-On Sundial is made in seven models, and the Large Spot On Sundials come in the London latitude.
Model Latitude deg. Suitable for use between latitudes:
A: Newcastle on Tyne. 55° N 53.25 to 58° N
B: London 51° 30' N 49.75 to 53.25° N
C: Vienna 48° N 45.5 to 49.75°N
D: Milwaukee 43° N 40.5 to 45.5° N
E: San Francisco 37° 45N 36 to 40.5° N
F: Los Angeles 34° N 32 to 36° N
G: New Orleans 30° N 26 to 32° N
S: Cape Town 34° S 27 to 41° S (see notes below)
The different models of sundials can also be adjusted at installation to compensate for latitudes outside the exact bounds above using the advanced setup instructions.
If you are looking for a sundial plinth, please see our plinth page for some of the manufacturers we work with.
The table below shows some of the places located on the latitudes dividing two models, so that you can identify the model you need from your atlas if you prefer. (If your location is exactly on one of these latitudes, you can use either of the two models either side equally successfully)
Northern Hemisphere Models:
Model Latitude. Places on Latitude Places on Latitude
(Europe) (North America)
Model A North of 53° 15'. Lincoln, Chester (UK),
(Newcastle-on-Tyne) Dublin (IRL) Bremen (D)
Model B 49° 45'. Luxembourg (L) Wurzburg (D) Vancouver(BC)
(London) Plzen(CZ) Winnipeg(MN)
Model C 45° 30'. St. Etienne, Chambery (F) Montreal (PQ)
(Vienna) Milano, Venezia (I)Aberdeen (SD)
Model D 40° 30'. Madrid(E) Taranto(I) Eureka(CA) Salt Lake City(UT)
(Milwaukee) Thessaloniki (GR) Pittsburgh (PA) New York (NY)
Model E 36° Algeciras (E) Kettleman City (CA)
(San Francisco). Malta, Rhodes (GR) Nashville (TN) Tulsa (OK)
Model F 32° Ensenada(MEX), El Paso (TX)
(Los Angeles) Jackson (MI), Savannah (GA)
Model G South of 32°N
Southern Hemisphere Models:
Model Latitude Places on Latitude Places on Latitude Places on Latitude
(South America) (Africa) (Australasia)
available North of 27 ° S Itaji, Brasil Standerton, Transvaal Kilcoy, Qld.
(see note A)
(Cape Town) 32 ° S Cordoba, Argentina Queenstown, Broken Hill, NSW.
(see note B) Cape Province
Model CT 36 ° S Talca, Chile Cape of Good Hope Brisbane, Qld.
(Cape Town) (34 ° 25' S)
(Cape Town) 41 ° S Oromo, Chile Devonport (TAS) (see note B) Masterton, NZ
available south of
41 ° S(see note A)
Note A: but it is possible to use the Cape Town sundial north of 27 ° S or south of 41 ° S using the techniques described in advanced set-up, though the angle of tilt required will be in excess of 7 deg
Note B: Between these latitudes, you need to use the techniques described in advanced set-up for complete accuracy