An accuracy assessment method for geographical line data sets based on buffering

Abstract

A method for quantitative assessments of spatial accuracy and complet eness for line data sets is suggested and explored. Data sets of high er accuracy are used for the assessments. The method utilizes only ge nerally available GIS operations. It works by establishing a number o f buffers of increasing width around the lines. For each width, the m aps are overlaid, and statistics are computed. By plotting the result s in graphs, the usefulness of the method is demonstrated. The meth od is explored using the Digital Chart of the World (DCW), with the N orwegian mapping authority's national N250 map series as reference da ta set.