Geert-Jan Brits wrote: > You're most likely talking about something like consine-similarity on > N-dimensional vectors. > http://en.wikipedia.org/wiki/Cosine_similarity > http://stackoverflow.com/search?q=cosine+similarity > Cool links ! Although it is not why I need it for. I'm really talking about an eucledian distance measure between vectors. So in a sense it is simpler. Normally the gis extensions already provide the basic tools necessary, if only the points could be extended to more than 2 dimensions. > You could google to see strategies that exist for mysql. > However, depending on your use-case (e.g: scalable recommender > systems) mysql (or any other rdbms) may not be the best tool for the job.
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