Pole of inaccessibility

In geography, a pole of inaccessibility is the farthest and most difficult to access location in a given landmass, sea, or topographical feature, category, or criterion, relative to a given origin point. A geographical criterion of inaccessibility marks a location that is the most challenging to reach according to that criterion. Often it refers to the most distant point from the coastline, implying the farthest point into a landmass from touching the shore (continentality), or the farthest point into the ocean from any landmass (oceanity). In these cases, a pole of inaccessibility can be defined as the center of the largest circle that can be drawn within an area of interest without encountering a coast. Where a coast is imprecisely defined, the pole will be similarly imprecise.