This field can only be found in the edit screen of your listing.
Simple explanation: It is the map ( not the page ) that your business is located on, in the STREETWISE MAP BOOK
1) This number helps people find your location in the STREETWISE MAP BOOK. This in combination with the StreetWiseRef field will give You and any visitors to your listing a quick reference to look up your location in the STREEWISE map book.
2) This field is also used to assist site visitors to use the on-line map grid to locate businesses that provide a certain product or service within that GRID AREA. We felt this is a far more tangible and understandable method to find localized businesses than using the postal code system to find businesses in an certain area.
Why use a map grid when they can use the electronic maps on line?
Look up Companies by street reference, this is great when you in a rush and know where a business is but can not remeber the name
The main reason being this is a local map and is MORE ACCURATE than the electronic systems. Another reason is, if someone does not have a computer , or is calling from a cell phone, and they have a STREETWISE MAP BOOK you can give them your co-ordinates and they can locate you immediately without having to GUESS which map and what section of the street you are on. This is especially helpful with long streets. It save you time explaining how to get to you and saves them time locating you on the map.