BACKSTORY: I need to collect 500 plant samples for strontium analysis. The samples are randomly distributed across a circular area with a radius of 300 kilometers. I have to do this in 30 days, so I want to be methodical.
REQUEST: Divide the circle into 30 regions of equal area using lines and/or arcs, NONE OF WHICH pass through the center of the circle. One wrinkle: I'd like each of the regions to have the highest compactness possible. That is, I'd like the average ratio of the area of the regions to the area of a circle having the same perimeter to be as close to 1:1 as possible.
DESIRED RESULT: An explanation of how to do this myself is good; a jpg of the solution is better!
Here's a possible, simple solution. The four circles have radii of $10\sqrt{30}$, $50\sqrt6$, $20\sqrt{105}$ and $300$ km. The first annulus is divided into 4 regions, the second one into 9 regions and the third one into 16. All regions have the same area.