Comments for Vinsol - Leading Ruby on Rails Development and Consulting Firm in India

Comment on Geo/Proximity Search with MySQL by Wolfgang Frank

Wolfgang Frank — Mon, 21 May 2012 09:23:00 +0000

Hi,

very good article!

I guess Eddy is right. The division through two in und SIN seems to be missing so that the distance formula looks like this:

DELIMITER $$ CREATE FUNCTION distance (a POINT, b POINT) RETURNS double DETERMINISTIC BEGIN RETURN 6375 * 2 * ASIN( SQRT( POWER(SIN( RADIANS( X(a) – ABS(X(b)) ) / 2 ), 2) + COS(RADIANS(ABS(X(a)))) * COS(RADIANS(ABS(X(b)))) * POWER(SIN(RADIANS(Y(a) – Y(b))), 2))); END $$DELIMITER ;

Comment on Geo/Proximity Search with MySQL by Vincent

Vincent — Thu, 26 Apr 2012 10:51:00 +0000

Very Nice. Thx! Just a little mistake IMHO, POINT mysql function takes longitude (x-axis) as first argument and latitude (y-axis) as Second argument:
http://dev.mysql.com/doc/refman/5.6/en/gis-class-point.html

Comment on Introduction to Active Scaffold Part I by RapidSSL

RapidSSL — Fri, 23 Mar 2012 09:37:00 +0000

Informative script your blog has which exactly helped us to configuration issue…!

Thanks a lot for sharing it with US!

Comment on Jquery Full Calendar with Ruby on Rails by Richlewis14

Richlewis14 — Mon, 12 Mar 2012 12:11:00 +0000

Excellent App, how would I go about adding this to an existing rails 3 app?

Comment on Geo/Proximity Search with MySQL by Crazydev82

Crazydev82 — Tue, 06 Mar 2012 14:52:00 +0000

Awsome Article. Thanks for providing such a detailed article. This is life saver for me. This helps me a lot to optimize my near by location query.

Comment on Deprecated FormTagHelpers by sbobet

sbobet — Fri, 02 Mar 2012 06:49:00 +0000

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Comment on Geo/Proximity Search with MySQL by Eddy Currents

Eddy Currents — Thu, 01 Mar 2012 10:46:00 +0000

Great article, but there appears to be an error in your statement of the distance formula (which carries through into the code). Shouldn’t the differences of the co-ordinates in the sin squared terms be divided by two? Shoot me if I’m wrong :-)

Comment on Apple Deprecated Access to UDID by Renew SSL

Renew SSL — Mon, 20 Feb 2012 13:27:00 +0000

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Comment on Game On! by Renew SSL

Renew SSL — Mon, 20 Feb 2012 13:24:00 +0000

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Comment on Jquery Full Calendar with Ruby on Rails by asiniy

asiniy — Sat, 18 Feb 2012 13:09:00 +0000

spy, you can go to the wiki of event calendar. It updated now