2. The computer-implemented method of claim 1 , wherein the index is a grid index comprised of a plurality of grid cells, the first and second objects are geometric shapes, and the second objects are larger than the first objects.
2. The computer-implemented method of claim 1 , wherein the index is a grid index comprised of a plurality of grid cells, the first and second objects are geometric shapes, and the second objects are larger than the first objects. 3. The computer-implemented method of claim 2 , wherein all geometric shapes from the pool are added to said group of candidates to produce the interim group of candidates.