The greatest prominence in most states has also been found with certainty or to a high degree of confidence. The most prominent peak in every county in Arizona and Nevada, California, and Utah has been determined. Because the data available have some inaccuracies, it is necessary to verify the results by hand on a topographic map before placing confidence in them. Nevertheless, this is a useful tool for ensuring that all peaks in a given area have been accounted for. A manual analysis is likely to miss a few.
Similar lists are pending for more states and the contiguous United States.
Remove these before using. John Roper , Jeff Howbert , and Steve Fry - determined the prominence of 2000 peaks in Washington and Oregon. Also determined the most prominent peak in each county in Arizona and Nevada. Edward Earl - developed computer program to find the prominence of all peaks in a given area using digital elevation data. The results have been used by other prominence pioneers to assist in their work.