The fingerboard has been around for almost a millenium, and harmony has been well established for nearly 400 years.  The harmonic structure of the fingerboard has given us all the guitar music we have ever heard.  The following is not subjective, it is simple music theory demonstrated visually on the fingerboard, and applies to all guitars with twelve or more frets and six strings in standard tuning.
Most guitar students will find the introduction  helpful.   Advanced players can go directly to the interval maps by choosing one of the four chord shapes.

INTRODUCTION
TO FINGERBOARD INTERVALS


CHOOSE A FINGERBOARD INTERVAL MAP

E G A C&D
Knowing where the intervals appear on the fingerboard is not much use if you dont know what they are or what they can do. Take your time. Learn to hear and identify the effect of every note in a chord. Examine your favourite chords, see what they have that makes you like them. and experiment with new voicings and inversions. These maps are to help you understand, and then expand your existing chord vocabulary.