Lab 3: M1.3: Assessment

Lab 3: M1.3: Assessment

Our 3rd and final lab in Data Quality was on Assessment. 

We compared the Jackson County road network to the US Census TIGER road network data. 

Before confining the roads to 1 km by 1 km grids for analysis the difference in street length between the two networks was about 576 kilometers, with the TIGER data seeming more complete. 

After clipping the roads to the grids the difference between the two networks rose by approximately 6300 kilometers. 

I then used the Pairwise intersect tool at the suggestion from a classmate. I had to do some trial and error with the summarize tool to get all the required information. There was 1 grid that had zero roads and 1 grid with only TIGER road data. 

I ended up with percentages in the high negatives. The highest being in negative 500 to 1000. A visual inspection shows that the TIGER road data may be roads that were planned and had not been developed yet or trails. I redid things a few times and kept getting the same results.