It

Pronoun

  is

Auxiliary

  northwest

Adverb

  of

Adposition

  Wellington

Proper noun

,  the

Determiner

  county seat

,  and

Coordinating conjunction

  east

Adverb

  of

Adposition

  Hedley

Proper noun

.

It is northwest of Wellington, the county seat, and east of Hedley.

It is northwest of Wellington, the county seat, and east of Hedley.