Archeofrag

S. Plutniak / Github

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Welcome to archeofrag

This is the companion application of the archeofrag R package, a package for the analysis of refitting pieces and stratigraphy in archaeology. Its main purpose is to measure the cohesion of two layers and their admixture, from the distribution of the refitting relationships between fragments and their topology.

This application demonstrates some of the features of the package, which can be applied either to the example data set (refitting data from the Liang Abu rock shelter, Borneo) or to your data.

Use the two buttons on the left to upload your csv files. The edges table must have a row for each a refit, with two columns containing the identifiers of the two fragments; the nodes table must have a row for each fragment, the first column contains the fragments identifiers and the second column contains their layer.

The code and more information are available on github.

Several parameters (number of fragments, relations, etc.) are extracted from the input graph and used to generate a set of similar artificial graphs. The values observed on the artificial graphs are reported in the figures below as density distributions. This enables to compare them to the value of the input graph (indicated by the vertical bar). Artificial graphs are generated for two hypotheses about the formation of the layers:

  1. assuming that the objects were buried in a single initial layer and subsequently moved;
  2. assuming that the objects were buried in two initial layers and subsequently moved.