TableĀ 1.

Quantization and topological errors for 10 different combinations of X and Y dimensions with c. 200 node

X dimY dimNodesQuantization errorTopological error
*6331981.137.49
8252001.147.81
10202001.138.00
12172041.138.20
14141961.158.48
16121921.148.28
18111981.148.20
20102001.147.96
2291981.147.93
2481921.148.00

Optimal SOM map dimensions (6 by 33) indicated by *.