 The concept of imagined geographies originated from an author who defined them as the West's patronizing representations of what?
The East
Title: Spin representation
Passage: In mathematics, the spin representations are particular projective representations of the orthogonal or special orthogonal groups in arbitrary dimension and signature (i.e., including indefinite orthogonal groups).  More precisely, they are representations of the spin groups, which are double covers of the special orthogonal groups.  They are usually studied over the real or complex numbers, but they can be defined over other fields.
Title: Orientalism (book)
Passage: Orientalism is a 1978 book by Edward W. Said, about the cultural representations that are the bases of Orientalism, defined as the West's patronizing representations of "The East"—the societies and peoples who inhabit the places of Asia, North Africa, and the Middle East.  According to Said, orientalism (the Western scholarship about the Eastern World) is inextricably tied to the imperialist societies who produced it, which makes much Orientalist work inherently political and servile to power.
Title: Imagined geographies
Passage: The concept of imagined (also referred as imaginative) geographies originated from Edward Said, particularly his work on critique on Orientalism.  In this context, "imagined" does not mean to be “false” or “made-up”, but rather is used synonymous with “perceived”.  Imagined geographies refers to the perception of a space created through certain imagery, texts, and/or discourses.
Orientalism (book) Imagined geographies