The Collaborative International Dictionary
Districting
District \Dis"trict\, v. t. [imp. & p. p. Districted; p. pr. & vb. n. Districting.] To divide into districts or limited portions of territory; as, legislatures district States for the choice of representatives.
Wiktionary
districting
vb. (present participle of district English)
Usage examples of "districting".
I made a surface check this afternoon, based on Manolo's districting pattern.