Special Topics Standards Lab 2

 

This lab focused on positional accuracy and used procedures given by the National Standard for Spatial Data Accuracy (NSSDA) to assess the data. Within this lab two sets of street data (ABQ cities and StreetMap USA) were given and an accuracy assessment was conducted on both. Using NSSDA guidelines 20 test points of intersections were made as shown above. From these test points reference points of the "true" location of the intersection was determined. Using the statistics from the points made a NSSDA horizontal accuracy statistic worksheet was created for each street data set. Using the NSSDA worksheet the Root Mean Square Error (RMSE) and the NSSDA statistic was found.

These are the NSSDA accuracy statements for each data set:

Tested 176.28 feet horizontal accuracy at 95% confidence level. (StreetMap USA)

Tested 25.56 feet horizontal accuracy at 95% confidence level. (ABQ Cities)