Diagram 5B information [Poster 5b]
Diagram 5B: Comparison of range charts obtained by five different methods applied to Palmer's (1955) database. Modified RASC and normal RASC results were added to ranges previously plotted by Edwards (1982). First and last occurrences were ranked for each method and these ranks were used to display the ranges. The modified RASC, Shaw (1964) and Edwards (1978) results are similar. The Hay (1972) and RASC ranges were based on average first and last occurrences. These generally are shorter than the other (conservative) ranges (from Agterberg, 1990).

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