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php Programming Glossary: distances

Measuring the distance between two coordinates in PHP

http://stackoverflow.com/questions/10053358/measuring-the-distance-between-two-coordinates-in-php

Testing it with some given points which have public distances I don't get a reliable result. I don't understand if there is.. has weaknesses around the poles though is stable for small distances . To get around them you could use the Vincenty formula instead...

Formulas to Calculate Geo Proximity

http://stackoverflow.com/questions/2096385/formulas-to-calculate-geo-proximity

considered If your problem domain is such that for the distances you are trying to calculate the earth can be considered as flat..

php (fuzzy) search matching

http://stackoverflow.com/questions/3208743/php-fuzzy-search-matching

this point what you basically have is a matrix with text distances. In concept not in real data it looks sort of like this table..

PHP MySQL get locations in radius user's location from GPS

http://stackoverflow.com/questions/3349808/php-mysql-get-locations-in-radius-users-location-from-gps

for the 3 algorithms is minimal especially at short distances The slowest algorithm the one with the whole bunch of trig functions..

PHP MySql and geolocation

http://stackoverflow.com/questions/3606139/php-mysql-and-geolocation

for the 3 algorithms is minimal especially at short distances The slowest algorithm is of course the one with the trig functions..

mySQL select zipcodes within x km/miles within range of y

http://stackoverflow.com/questions/4011944/mysql-select-zipcodes-within-x-km-miles-within-range-of-y

I found this Want to find all zipcodes and corresponding distances within a certain mile kilometer radius from another zipcode..

RGB to closest predefined color

http://stackoverflow.com/questions/4485229/rgb-to-closest-predefined-color

^2 b b1 .114 ^2 Of course since you don't need the exact distances just a comparison you can and probably should just skip the..

Geo-Search (Distance) in PHP/MySQL (Performance)

http://stackoverflow.com/questions/5236921/geo-search-distance-in-php-mysql-performance

in your query against that subset to calculate the actual distances and factor in the HAVING clause at that point. It's the bounding..