1. A method for calculating a multi-trace geometric attribute of a surface at multiple scales, the surface regularly gridded with grid points, comprising the steps of: selecting a window size; selecting a set of the grid points defining grid cells of the selected window size; calculating the geometric attribute using the traces at the set of the grid points; repeating selecting and calculating steps for sets of the grid points defining grid cells of different window sizes; and determining the window size whose calculations best represent the geometric attribute.