"Networks were created with dendrochronological material as nodes and the edges defined by a combination of noverlap, r, SGC and p of the pair-wise comparison of the dendrochronological material. These were stored in the database and selected for network creation. Since all relations are reciprocal the network is undirected, and duplicate edges have been removed. The networks were created using various levels of testing (as defined by Daly 2007b), resulting in nodes as: Site chronologies, Site chronologies and trees, Trees"

"In this paper I will focus on the network of the first level of testing, with each node representing a single site chronology. The edges are based on the comparison of both the C and M chronologies. The other levels are often needed for the (archaeological) interpretation of the network. Initially the edges were selected from the database using r ≥ 0,5, SGC ≥ 70% with p ≤ 0,0001 and noverlap ≥ 50 for each pair-wise comparison. Previous research has shown that wood from the same region often show similarities well above these values (Visser 2006; Vorst 2005). To test these values the combination of thresholds for creating edges was varied, leading to four network-types:

r ≥ 0,5, SGC ≥ 70% with p ≤ 0,0001 and noverlap ≥ 50;

r ≥ 0,5, SGC ≥ 70% and noverlap ≥ 50;

r ≥ 0,5, any SGC with p ≤ 0,0001 and noverlap ≥ 50;

A merged network of 2 and 3.

The resulting networks are described using standard variables, such as the number of nodes (N), the number of edges (E), the number of components and the diameter of the network (δ). The average degree (K) describes the degree to which the nodes in the network are connected"