Visualizing the shapes (using charts in Mac Numbers)
A spiral gore is the first or second half of a miter gore, conversely, a miter gore has 2 consecutive spiral gores, knit in a mirror image. 
GOING ROUND: numbers 1-12 represent knitting sequence for wedges, thicker lines at segment edges = rows across knit width at end of each sequence, 2 rows or many more depending on planned design shape
Previous posts on related topics:
2011/06/18/knitting-math-and-pies1/
2011/06/24/taking-it-to-a-garment/
2011/03/29/the-doilies/
2013/12/28/short-rows_-balls-tams-3d-rounds/