Step 1
Create a circle and fill it with a light gray color.
Step 2
Goto Filter>>Render>>Difference Clouds. It is okay if it doesn't show up that well.
Step 3
Next goto Image>>Adjustments>>Levels and move the handles toward the area with a lot of "Spikes".
Step 4
Your image should start looking like a globe. Finally goto Filter>>Sketch>>Note Paper.
Final Result:
