Sometimes the geocoder returns coordinates that don't seem right. Unfortunately, there's no way to get Yahoo's precision information using this form -- but you can see Yahoo's precision estimate for individual addresses if you run them through the Quick Geocoder.
One common source of errors (aside from missing, misspelled, or poorly-aligned header rows) is non-street addresses that look like addresses, like P.O. Boxes or named buildings. For example, "200 Jackson Building, 333 2nd Street" might be interpreted as "200 Jackson Street" by Yahoo. There's really no way to get around this, other than ensuring that your "address" column contains actual street addresses.
|©2003-2012 Adam Schneider, . E-mail: adam gpsvisualizer com.|