Eric, You need to physically evaluate each output. If all restrictions are relaxed and you have a multiple match selection, the georesult may show a high match level, but be completely erroneous. ie:
Your address is 1234 Frost Street, Chicago, IL. With match restrictions you might have a choice of 1200-1300 Frost, Chicago, IL. along with some other options. Without match restrictions you might get an automatic match to 1234 Frost Street, Columbus, OH, and the georesult would show an exact match. Run some of your files through interactive instead of automatic matching and you will see what I mean. John D. Haynes Director Geodata Consultants, Inc. 1-800-838-6661 ex.10 [EMAIL PROTECTED] www.geodataconsult.com ----- Original Message ----- From: "Eric Frost" <[EMAIL PROTECTED]> To: "Quan, Sheila" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 11:20 AM Subject: RE: MI-L MapMarker procedure > > "Quan, Sheila" <[EMAIL PROTECTED]> wrote: > I use UK's MapMarker quite extensively. It is very important to have stringent match restrictions initially and then pass the database through by gradually relaxing them in a specific order ... e.g. full address over zip/postcode. Otherwise, you will indeed have many errors described by John below! > ___ > Thanks Sheila, > I did indeed find 5 of the 20 I manually inspected to be "false positives" and intuitively it does make sense to do several passes.. is there an order to loosen the restrictions that is considered best? > I had loosened each of the match restrictions first, then allowed multiple matches (street address over zip4), then fallback, but just doing a single pass did a better overall job (at least for my 10,000 addresses, I realize this is not an exact science). I'll play around with different orders and see if I come up with something better.. > Thanks, > Eric > --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 5560
