Lab 3: Determining the Quality of Road Networks

The goal of this lab was to get more experience with accuracy assessment. The TIGER 2000 data had 258 grid squares that were more complete than Jackson County GIS. Jackson County GIS had 38.
The map above shows the percent difference in completeness between a set of road data from Jackson County GIS and one from TIGER 2000. The blue areas show grid sections that differ by less than 100%. White to brown are the more extreme values. One grid section had a difference of over 1700%! The negatives show percent difference in favor of TIGER 2000 having more data in that grid section. The positives favor Jackson County GIS.