The goal of the accuracy assessment is to determine the completeness of the roads compared to each other in each gridcode in the study area. Specifically how different the Centerline shapefile is from the Tiger shapefile in the grided area. In order tot do this I had to clip the two shapefiles by the grid to only calculate the roads in that area. Then I used the intersect tool between the grid layer with each of the road layers. Then after that I used the percent difference formula in excel with the centerline as the base line to calculate the difference in length within each grid between the two road shapefiles.
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