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Posted by vunet.us on 06/19/07 21:26
On Jun 19, 3:41 pm, "Beauregard T. Shagnasty"
<a.nony.m...@example.invalid> wrote:
> vunet...@gmail.com wrote:
> > On Jun 19, 12:56 pm, "Jukka K. Korpela" <jkorp...@cs.tut.fi> wrote:
> >> Scripsit Beauregard T. Shagnasty:
>
> >>> A visitor, once realizing you are checking zipcodes, may still enter a
> >>> bogus name and street address.
>
> >> Or he may move to a better site.
>
> >> Any checks have the risk of rejecting correct data. It's actually _very_
> >> difficult to check even an e-mail address reliably. Zip codes might be
> >> easier since they constitute a finite and known set, but what happens when
> >> the set changes, e.g. new codes are added?
>
> What happens is that the next quarterly subscription update to the
> zipcode database should reflect the new codes. ;-)
>
> > What if I use google map to determine a valid address? I'd get HTML of
> > the map page with user-supplied 'loc' string and if google does not
> > find it (will contain string "No match found" inside) I will alert the
> > user of a wrong address entered...?
>
> That won't work. I just typed a non-existent street address for my
> street, and google maps quickly showed me the woods nearby, where no
> house exists.
>
> And you will never be able to check for valid names.
>
> I run the computers for an annual event's registration, where there are
> normally a bit over a thousand people. Using my up-to-date US and
> Canadian zip/postal code databases, I always get forms with zip and
> postal codes not in the latest databases. Whether or not the people are
> writing down correct numbers (and letters), I have no way to tell. So I
> accept them, and add them to the database with a marker signifying
> 'added at the event.' Then I check later...
>
> --
> -bts
> -Motorcycles defy gravity; cars just suck
Thank you for sharing your experience. Well, if manual check is still
the final touch, perhaps, there is a way to get rid of international
spammers who register with Indianapolis, FL, 11133 USA? What would you
suggest considering the fact I have no geographical database (yet)?
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