For this lab, we had to assess the completeness of a network of roads from Jackson County, Oregon, comparing the County's data to that of TIGER data from the US Census. Because we're always building more in this country, it's assumed that more roads mean more complete data. As such, the datasets were compared by the metric of total road length.
For the analysis, we first looked at the county as a whole. The TIGER total length was 11382.7km while the County dataset was 10805.8km. By our metrics, the TIGER dataset appears to be more complete and more accurate.
To get a better look at different parts of the county, we used a 5x5km grid, clipping each dataset to this and comparing individual grids. To accomplish this, I used the split tool on each road network and then used Python script to calculate and sum the road segments for each grid. Finally, I calculated the percentage difference for each grid using the County data as the base and created a map to visualize this information.
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