Comparisons of Road Networks

 The goal of the accuracy assessment is to determine the completeness of two road networks—TIGER roads and county center lines—in Jackson County by comparing the total lengths of roads for each network. This is a key indicator of the data quality and coverage of the road networks, similar to methodologies used in Haklay (2010). By assessing the completeness of these datasets, the study aims to identify which road network provides a more comprehensive representation of the county's road infrastructure.
The analysis methodology involves several steps:

• Both road network shapefiles (TIGER roads and Street Centerlines) are added to a map in ArcGIS Pro. To ensure accurate comparison, the TIGER roads shapefile is projected to match the coordinate system of the county centerlines.

• Using the attribute tables, the total length of roads for both networks is calculated.

• The road networks are clipped to a grid of polygons covering the county. This ensures that only road segments within the grid boundaries are counted. The Split tool is used to break up the road segments by grid, followed by calculating the geometry of each segment for both networks.

• The road lengths for both networks are compared within each grid polygon. For each grid, the percent difference in road length between the TIGER roads and the county centerlines is calculated to determine which dataset is more complete.