Here we find not only the five linguistic similarity matrices mentioned above (under "Similarity Matrix A"), but also the matrix of "geographical (Euclidean) similarity" whose values have been calculated using the Pythagorasâ€™ theorem (*a² + b² = c²*) taking into account the geographical coordinates x and y of the N inquiry points.

Warning: if you correlate two identical similarity matrices, you get completely blue maps (based on N rBP scores of +1), which obviously have no linguistic meaning.