Have you looked at MapPoint2000 from M$? I don't know if it has all the features you need but I've found it to be really, really cool. You could do automation with it and you can't beat the price (less than $100).

>Hi,
>
>I am looking for a map capability to provide me with longitude and latitude in a level of street blocks.
>I need to locate a news rack on the street based on that. An address does not really works well. Since it is located in side walk. A map that can read also a dbf format, so I can zoom right in, based
>on some data linked into the map. That may work also with a GPS unit that can be accurate between 3 to 15 feet.
>
>Any input appreciated.
>
>Thanks
>
>Doron