Reconstruction of digitized contour lines
Charles Glen Swenson · Montana State University ScholarWorks (Montana State University) · 1991
A method is proposed for the understanding and reconstruction of raster images of paper-based topographical maps.Topographical maps of mountainous regions can exhibit certain inherent problems.Among these is the confluence of contour lines when spacing between the contours becomes too confined for the resolution of the map.A method to automatically detect and resolve such junctions in raster images is proposed and tested.In this method, contours are efficiently thinned as they are extracted, without thinning cliff areas or other map symbols.This results in end points in the extracted contour lines at the junction points.The Breakpoint Method is shown to be effective for resolving these end points.