Trying to enter From and To addresses, geocode them, and display on a Google Map

Hello,
I am a newbie, and was also looking to present a location on a map, this thread was great for a starting point.
I am still not sure if I need to save the address into the database in order to show it an a map, or can use the text fields to generate a marker.
Any help will be great.

how did you make both “to latitude field” and “to longitude field” appear?

EDIT: Nevermind, I figured it out. The Thing has to have 2 number fields