Module 1.3: Data Quality - Assessment

For this lab the goal of the accuracy assessment was to determine the percentage difference between 2 road shapefiles put up against a grid overlay in Jackson County, Oregon. The analysis methodology utilized the readings from Haklay 2010 for the most part, and that entailed using the Clip tool, determining lengths within each grid for each road shapefile and then comparing them to get the difference. Tools also used were Intersect and Summarize Within, along with an Excel spreadsheet to compare the data visually easier. Once I had my two data sets I was able to Intersect them and calculate the percentages in ArcGIS Pro. The layout was created using this combined data set in a graduated color symbology to show where the differences between the -103 and 80 percentage data were the most and least extreme. See layout image below.

Comments: I wanted to showcase the grid symbology, but not leave out the roads. Finding a color combination that did not crowd or take over was difficult, but I am happy with the results.