SCSA: The Pole-to-Dial Converter-Calculator
Use the SCSA "Pole-to-Dial Converter-Calculator" to convert any vertical pole (e.g., a flagpole, utility pole, etc.) into a fully functional sundial featuring "date curves" (declination lines) for the equinoxes and solstices.
Enter your latitude and gnomon height (pole height) below, then click on the "Calculate!" button. The Pole-to-Dial Converter-Calculator will calculate all of the hour angles and distances that you need to construct the date curves on your sundial.
To find your latitude and longitude, consult a good map or visit:
Entire world: http://www.getty.edu/research/conducting_research/vocabularies/tgn/
Entire world except USA: http://www.calle.com/world/index.html
USA Only: http://www.census.gov/cgi-bin/gazetteer
CAUTION: This table will not work well for latitudes smaller than 4 degrees.