Elevation Analysis using the National Elevation Dataset
Isolation Limit Points
The Isolation of a summit is defined as the distance from that summit to the next nearest higher ground. The location of the nearest higher ground, usually a point on a slope, is called the Isolation Limit Point(ILP). Due to the difficulty in finding the exact location of the ILP, isolation is often reported as the distance from a given summit to its closest higher summit, which provides a good approximate value.
With the right algorithm and accurate digital data it is possible the find ILP locations without tedious mapwork. Below is a listing of isolation values(in miles) along with isolation limit points for summits in Colorado(west of 104.5W longitude) and utah. Error range for ILP locations is 30m. Any summits whose isolation is within 30m of its nearest higher summit retains the original summit to summit isolation value. The list below are not final - some summits were not calculated due to unknown issues with the digital elevation model - see lists below.
Click on the adjusted isolation figure for a map representation of isolation. Click on the coordinates for a map of the isolation limit point, with a circle enclosing the geographic error range.
Summit to Summit isolation values taken with permission from John Kirk, listsofjohn.com. Isolation and Isolation Limit Point concepts by Greg Slayden, peakbagger.com.
The lists below are preliminary, and still contain some errors.