The tag, "prominence=*" has been in use for a number of years, but the proposal was abandoned before a vote back in 2009. I have revived the proposal and now request your comments and suggestions before bringing it to a vote: https://wiki.openstreetmap.org/wiki/Proposed_features/key:prominence
"Use the tag prominence=* to specify the Topographic prominence of a natural=peak in meters" "Topographic prominence is a objective measurement of how significant a peak is. For example, lists of tallest mountains use a minimum prominence cutoff of 100, 200 or 300 meters to define an independent peak. In general, all peaks with very high prominence (over 1500 meters) are important mountains. But not all important peaks have high prominence." "Prominence might be used to select peaks for rendering, or to select significant peaks for analysis by database users. A scheme which can work both for Denmark and Switzerland, would be: If too many peaks are present within a particular area of the map at a certain zoom level, select the ones with highest prominence. Different thresholds might be used for when to render a peak symbol only, versus render the peak with a name label or elevation." "The prominence of a peak is the same as its elevation if it is the highest point on a continent or island. All other peaks on the same landmass have a prominence that is lower than their elevation, found by subtracting the elevation of the lowest saddle (also called the "key col") along the ridge that connects to the next higher mountain." Wikipedia: http://en.wikipedia.org/wiki/Topographic_prominence An introduction to Topographic Prominence http://www.peaklist.org/theory/orometry/article/Orometry_1.html -Joseph _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
