To the discrete candidate set construction method(division of the continuous geographic district) for distribution
center location problem, ??-growth multi-scale gridding model is proposed to discrete the continuous geographic district, in
which gridding scale varies according to location sensitivity. Furthermore, projection and dilation algorithm for multi-scale
grid is given to identify the restriction regions and adjacent grid set within user-defined distance parameter. Finally, numerical
experiments on real dataset show the effectiveness of the proposed method.