I believe it's globular and open are the main types.
The main reason, which I have read about in some books, is that they do not permit industrial building on those islands, so who would want to live there? It is a very bare bones society.
Distance of two points can be calculaetd using formula:
![d= \sqrt{ ( x_{2}- x_{1} )^{2}+ ( y_{2}- y_{1} )^{2} }](https://tex.z-dn.net/?f=d%3D%20%5Csqrt%7B%20%28%20x_%7B2%7D-%20x_%7B1%7D%20%20%29%5E%7B2%7D%2B%20%28%20y_%7B2%7D-%20y_%7B1%7D%20%20%29%5E%7B2%7D%20%7D%20)
Here x1 and y1 are coordinates of point A and x2 and y2 are coordinates of point B.
Now we insert numbers into formula:
It is continent cause there is no term for many continents because continent is the biggest landmass.