Builds a layer of the landscape with a shortest-splitline algorithm to assign landscape cells among owners
owner_land_ssa(dim_x, dim_y, owners, public_land, land_var)
The number of cells on the X dimension of the landscape
The number of cells on the Y dimension of the landscape
Number of owners among which landscape cells will be divided
The amount of land that will not be owned
Does distribution of land vary among users? >=0, <1
A two dimensional array of cells with ownership values