postal-code

Note: Although I use a zipcode database with Dutch zipcodes, this question is country independent. I have a database with every zipcode in the Netherlands + its x and y coordinate (lat/long). I have for example zipcode: $baseZipCode = 1044; with the following coordinates: x coordinate = 4,808855 y coordinate = 52,406332 Now, I want to find all other zipcodes with $range from $baseZipCode . For example: SELECT zipcode FROM zipcodes WHERE ????? // Need help here The problem is that the earth is not completely round. I find a lot of tutorials with from a to b calculations but that's not what I

I'm trying to submit a query using the postal code to my DB whenever the googlemaps viewport center changes. I know that this can be done with reverse geocoding with something like: google.maps.event.addListener(map, 'center_changed', function(){ newCenter(); }); ... function newCenter(){ var newc = map.getCenter(); geocoder.geocode({'latLng': newc}, function(results, status){ if (status == google.maps.GeocoderStatus.OK) { var newzip = results[0].address_components['postal_code']; } }); }; Of course, this code doesn't actually work. So I was wondering how I would need to change this in order

From first glance, it would appear I have two basic choices for storing ZIP codes in a database table: Text (probably most common), i.e. char(5) or varchar(9) to support +4 extension Numeric, i.e. 32-bit integer Both would satisfy the requirements of the data, if we assume that there are no international concerns. In the past we've generally just gone the text route, but I was wondering if anyone does the opposite? Just from brief comparison it looks like the integer method has two clear advantages: It is, by means of its nature, automatically limited to numerics only (whereas without