A matches sample points within the originating database. Test Set B examines the accuracy with which coordinates alone can identify the correct link in another database. The transfer is made using coordinates only, and confirmed by checking cross street names. As documented above, names are unreliable as a means of judging success. Therefore hits are scored on a scale of likelihood of matching, with some tolerance of blank fields.
Results are far better for field-sampled points, which generally lie on named streets. .
Obviously, transfers are always apparently successful. This count is termed Bin 9, a reference to Bin 9 on the name processing flowchart . The name match could in some cases point to the wrong street, or if the destination database does not contain the road referenced in the source, transfer by coordinate may erroneously snap to the nearest available entity. These problems are addressed in Test Set D below. All Streets Major Streets only .