Introduction

Objectives

Methodology

Analysis

Error Issues

Results

The southern and central map coverages were first completed before the digitizing of the northern coverage commenced so that base map repositioning would occur only once.  A new field called soiltype was created so that new label id’s represented and corresponded to the attribute features shown on the base map.

Clear acetate was overlain over the base map in which digitizing was done over.  Arcs that had been digitized were penciled over and polygons that were labeled were marked over with an X.

Arcs were extended past the outside of the digitizing map borders so that intersections could be easily made and the overshoots could be deleted once the topology building CLEAN operation was implemented.   On each coverage, the first CLEAN operation was performed after all of the map border arcs and most of the digitizing on each was completed, so that all of the border overshoots and most of the coverage topology could be built at one time. This was also to reduce the number of CLEAN operations to a minimum – avoiding if possible the creation of unnecessary and unwanted polygons - so that BUILD could be implemented for future topology updates.