So, assuming we have a table:
ZIP_CODES
zip_code | lattitude | longitude
We take this zip code from NY
$zip = 10001
$lat = 40.750742
$lon =-74.52976
What we need is the Earth radius (6371 km).
If we need to search the zip codes that are in a 10 km area, we could use this 'small' sintax:
Showing posts with label longitude and latitude distance calculator. Show all posts
Showing posts with label longitude and latitude distance calculator. Show all posts
Thursday, June 16, 2011
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