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!
Sheila Quan Steer Davies Gleave 28-32 Upper Ground, London SE1 9PD > [direct] +44 (0)20 7919 8509 > [reception] +44 (0)20 7919 8500 > [fax] +44 (0)20 7827 9851 > [email] [EMAIL PROTECTED] > www.steerdaviesgleave.com This message is sent in confidence for the addressee only. It may contain legally privileged information. The contents are not to be disclosed to anyone other than the addressee. Unauthorised recipients are requested to preserve this confidentiality and to advise the sender immediately of any error in transmission. -----Original Message----- From: John Haynes [mailto:[EMAIL PROTECTED]] Sent: 18 February 2003 15:44 To: Eric Frost; [EMAIL PROTECTED] Subject: Re: MI-L MapMarker procedure Eric, The problem with one pass no restrictions, you will get errors as bad as a different state and zipcode. 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: <[EMAIL PROTECTED]> Sent: Tuesday, February 18, 2003 10:30 AM Subject: MI-L MapMarker procedure > > Listers, > > I recently inherited a MapMarker project for which the internal documentation says to go through several passes starting at the strictest level and then slowly relaxing each of the Match Restrictions, Multiple Match, and Fallback restrictions respectively. However, I seem to get better results just allowing a single pass with all restrictions relaxed. > > >From manual inspection of 20 that the single pass method seemed to match better, 15 are indeed considerably better, whereas five are "false positives" for which the several pass method did a better job. > > Is there an "expert" procedure perhaps somewhere between the two that more or less consistently does the best job for geocoding? Are other people playing with doing several passes as opposed to a single pass with all restrictions relaxed? > > 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: 5556 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 5557
