Zip Code sensitivity
results seemingly too broad
Version: 5.0.5
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sparkalina
Forum Regular Usergroup: Customer Joined: Nov 25, 2003 Total Topics: 69 Total Posts: 198 |
 #1
I've been doing some test searches using the US postal codes. It seems that the isn't much sensitivity to the zip code request. IE I know that zipcode 91350 is more than a mile from 90210 (chatsworth versus beverly hills) so when I search for "diner" within 1 mile of 90210, I should not get the listing in Chatsworth 91350. But I am. Shouldn't I get "no result" because this item is located more than a mile from 90210? Default search type for simple search set to: "contains". I'm using the form examples from the manual and the one that is on the advanced search template. Edited by sparkalina on 09/21/08 - 11:08 AM |
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Paul
developer  Usergroup: Administrator Joined: Dec 20, 2001 Location: Diamond Springs, California Total Topics: 65 Total Posts: 7614 |
#2
How far are these away? It's certainly unlikely to be accurate to within a mile -- zip codes themselves aren't, my zip code covers 90.5 square miles. Who knows where in the zipcodes it has the lat/long from... and I don't know that the database has enough decimal places to resolve to a mile anyway. I'm just using public data. Edited by Paul on 09/22/08 - 3:28 PM |
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sparkalina
Forum Regular Usergroup: Customer Joined: Nov 25, 2003 Total Topics: 69 Total Posts: 198 |
#3
I know that the county chatsworth is in is more than 1 mile away from the county beverly hills is in. but if this is a limitation based on imported data that you nor I have control over, than my client will have to accept the discrepancies. |
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Paul
developer Usergroup: Administrator Joined: Dec 20, 2001 Location: Diamond Springs, California Total Topics: 65 Total Posts: 7614 |
#4
for $range distance from a zipcode: $latitude = $r[0]; $longitude = $r[1]; $latrange = $range / 69.172; $lonrange = abs($range / (cos($latitude) * 69.172)); $minlat = number_format($latitude - $latrange, "4", ".", ""); $maxlat = number_format($latitude + $latrange, "4", ".", ""); $minlon = number_format($longitude - $lonrange, "4", ".", ""); $maxlon = number_format($longitude + $lonrange, "4", ".", ""); All zipcodes which are in that square area are then searched. |
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