My English is little so sorry
Step 1: Finding
Find or make a panorama picture
Step 2: Resizing
And to square width size (for example: from 2000x650 to 2000x2000) "Image>Image size"
Step 3: Rotating
Rotate 180° "Image>Rotate Canvas>180°"
Step 4: Polaring
And use polar coordinates filter "Filter>Distort>Polar Coordinates" Select "Rectangular to polar" and click OK
Step 5: ActionThis is 2000x2000 Photoshop action. Click PLAY and enjoy