Almost a fifth of NYC’s officially published collision data is ambiguous or wrong

“The success rate was much less than the combined ArcGIS/Google approach: almost 18% of the intersections could not be associated with lon/lats. However, the Geoclient’s error messages are great. Instead of pulling the wrong lon/lat or nothing at all, it identifies exactly what’s going wrong: in almost 1 in 10 intersections in the reports, the identified streets don’t even intersect.”