In the absence of a formally agreed, worldwide dictionary definition of 'Quotography' (in 2016), here are my two cents worth: 'Quotography is the art of pairing unique quotations with complementary images in order to express thought-provoking ideas, challenging concepts, profound sentiments'.
Mark Twain cannot be defined.
Engineers are often defined by their output.
Andy Warhol defined Pop Art.
As a schoolboy, poetry seemed defined by preciousness. It was all very rarefied.
If the end of the twentieth century can be characterized by futurism, the twenty-first can be defined by presentism.