Structuralist anthropology had reduced some aspects of culture to equations (Levi-Strauss, updated by James Harrod, discussed in my paper Blueprint). The spatial layer of nature and culture includes a subconsciously compulsive axial grid between eyes in artworks, or focal points in built sites (the mindprint or stoneprint or blueprint model of archetypal structure). I have reduced recurrent features in the cultural record, to a set of innate rules and fixed average frequencies. I need relevant applications of cluster analysis to quantify and compare variant re-expressions of the spatial grid.