Distance between longitudes and latitudes

Dan · 09-27-2006, 08:44 PM

PHP Code:

  <?php

 
// Example points

$lat1 = '117.1216';

$lon1 = '32.69460';

$lat2 = '117.0516';

$lon2 = '32.70614';

 
function deg_to_rad($deg) {

     $radians = 0.0;

     $radians = $deg * M_PI/180.0;

     return($radians);

}

 
$distance = 3956 * 2 * atan2(sqrt(pow(sin((deg_to_rad($lat2) - deg_to_rad($lat1))/2.0),2) + cos($lat1) * cos($lat2) * pow(sin((deg_to_rad($lon2) - deg_to_rad($lon1))/2.0),2)),sqrt(1-(pow(sin((deg_to_rad($lat2) - deg_to_rad($lat1))/2.0),2) + cos($lat1) * cos($lat2) * pow(sin((deg_to_rad($lon2) - deg_to_rad($lon1))/2.0),2))));

????: NamePros.com http://www.namepros.com/code/242000-distance-between-longitudes-and-latitudes.html
????: NamePros.com http://www.namepros.com/showthread.php?t=242000
 
echo $distance; // Miles between the points.

 
?>

I'm working on a script related to this and I found this pretty amazing, so I thought I'd post it.

netzilla · 09-27-2006, 08:48 PM

Wow...thanks for the share.

bbalegere · 09-30-2006, 04:15 AM

This is basically Maths.
You just got know how Longitudes and Latitudes are calculated.
The programming part is easy.

Dan · 09-30-2006, 09:54 AM

Originally Posted by bbalegere

This is basically Maths.
You just got know how Longitudes and Latitudes are calculated.
The programming part is easy.

Did anyone say anything had to be hard to be posted? I highly doubt you could figure that out anyways.

sdsinc · 09-30-2006, 09:58 AM

Anybody have good sources for location databases ?

Dan · 09-30-2006, 10:03 AM

http://dan-friedman.com/s/zipcodes.rar

baxter · 10-01-2006, 09:14 AM

thanks for the share Dan.. was wondering how they figure that out.

09-27-2006, 08:44 PM	THREAD STARTER #1 (permalink)
Dan Buy my domains. Join Date: Feb 2006 Posts: 2,792	Distance between longitudes and latitudes PHP Code: <?php // Example points $lat1 = '117.1216'; $lon1 = '32.69460'; $lat2 = '117.0516'; $lon2 = '32.70614'; function deg_to_rad($deg) { $radians = 0.0; $radians = $deg * M_PI/180.0; return($radians); } $distance = 3956 * 2 * atan2(sqrt(pow(sin((deg_to_rad($lat2) - deg_to_rad($lat1))/2.0),2) + cos($lat1) * cos($lat2) * pow(sin((deg_to_rad($lon2) - deg_to_rad($lon1))/2.0),2)),sqrt(1-(pow(sin((deg_to_rad($lat2) - deg_to_rad($lat1))/2.0),2) + cos($lat1) * cos($lat2) * pow(sin((deg_to_rad($lon2) - deg_to_rad($lon1))/2.0),2)))); ????: NamePros.com http://www.namepros.com/code/242000-distance-between-longitudes-and-latitudes.html ????: NamePros.com http://www.namepros.com/showthread.php?t=242000 echo $distance; // Miles between the points. ?> I'm working on a script related to this and I found this pretty amazing, so I thought I'd post it.

09-30-2006, 04:15 AM	#3 (permalink)
bbalegere Senior Member Join Date: Jul 2005 Location: Bangalore Posts: 1,270	This is basically Maths. You just got know how Longitudes and Latitudes are calculated. The programming part is easy. __________________ Fire-Power Blog-AgniPulse.com Internet speed test PPC search Web site hosting review Computer Auctions Computer running slow

09-30-2006, 09:58 AM	#5 (permalink)
sdsinc Domains my Dominion Join Date: Aug 2005 Location: Web 1.0 Posts: 9,955	Anybody have good sources for location databases ? __________________ NameNewsletter.com - free lists of available domain names ZoneFiles.net (beta) - ccTLD and gTLD droplists

09-27-2006, 08:48 PM	#2 (permalink)
netzilla Senior Member Join Date: Aug 2005 Posts: 1,716	Wow...thanks for the share.

09-30-2006, 10:03 AM	THREAD STARTER #6 (permalink)
Dan Buy my domains. Join Date: Feb 2006 Posts: 2,792	http://dan-friedman.com/s/zipcodes.rar

10-01-2006, 09:14 AM	#7 (permalink)
baxter NamePros Regular Join Date: Apr 2006 Posts: 360	thanks for the share Dan.. was wondering how they figure that out.

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