1. You should assume that Tuusula is completely cache-free area
2. You don' t have to worry about lakes , rivers, houses, private areas : all locations inside Tuusula borders are allowed as long as the GC- minimum-distance-rule is obeyed (use exact metric conversion for the distance D= 0.1 miles)
3. Data for Tuusula borders is given
4. You don' t need to construct e.g. Leech lattice - just find out the form for the optimal 2D circle packing grid, and align this optimal grid in assumingly orthogonal (E,N) coordinates : this is easy to prove NOT to be the absolutely optimal solution for the task - but for solving this mystery it certainly is
5. One of your caches must be inside a 50 meter radius circle drawn around Bogus.
6. Write down and remember the number Z = maximum amount of caches Tuusula can hold
7. Calculate P= C/A , where A (km^2) is the area of Tuusula :
the area (AAA.aaa km^2 => Checker hot point: N AA A.aaa E 0 0.000) should be calculated with given borders, and you need only exactly 3 decimals in the calculations to come.
C is the total area of the circles (radius D/2) centered in your optimal set of cache-points with : if your P>1 you might want to check your calculations , but if it is just slightly bigger than the optimal packing ratio, no need to worry
8. Find the cache:
Calculate : ABCDEFGHIJKLMNO = INT ( Z^3*A)
Distance from bogus: JEHJ.D (m)
Direction : BDC.FF (deg)