Diagram 5B information
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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