We run many seminars and other physical events where we want to invite contacts who are within driving distance of the venue -- for example, with 200 mile radius of Philadelphia, PA. Today, I use a third party map program to find all the 3-digit zip codes within the radius, and then I build filters for these zip codes. This works for numeric zip codes (like USA) or alpha-numeric (like Canada), but the filters can get large. In fact, there are times, because filters are limited to 15 parameters, that I have to use multiple filters (and then multiple segments) to define the full target geography.
I'm wondering if anyone has a better option or knows of any cloud apps to help.
Thanks!