Geolocalização com MongoDB e Rails

Geolocalização com mongoDB e Rails e outros nosql em startups Maurício Maia @mauricio

vitrines de produtos

cache de produtos

mongoDB > MySQL > Cassandra

Yahoo! Open Hack Day março 2010

PlaceHacker Sinatra, MongoDB, mongo-ruby-driver

Topical PlaceHacker rewrite Rails 3 MongoDB Mongoid Reconhecimento de Entidades

Topical Mapa de notícias

Topical Stream de notícias locais

Topical Mobile

Por que mongoDB? fácil ﬂexível cases geospatial indexing

Cases analytics, real-time, documentos, geo-location

Show me the code!

Preparando $ gem install mongoid --pre $ gem install bson_ext Gemﬁle gem "mongoid", "2.0.0.beta.16" gem "bson_ext", "1.0.4" $ rails generate mongoid:config

Geospatial Indexing class Article include Mongoid::Document include Mongoid::Timestamps field :title, :type => String field :lead, :type => String field :published_at, :type => Time field :location, :type => Array index [[ :location, Mongo::GEO2D ]], :min => 180, :max => 180 index :published_at, Mongo::DESCENDING end db.articles.ensureIndex( { location : "2d"}, { min : -180, max : 180 } )

Querying near Article.near(:location => [ -23.552314, -46.6500949 ]) db.articles.find( { location : { "$near" : [-23.552314, -46.6500949 ] } } )

Querying within center Article.where(:location.within => { "$center" => [ [ -23.552314, -46.6500949 ], 10 ] }) db.articles.find({location : {"$within" : {"$center" : [ [-23.552314, -46.6500949 ] , 10]}}})

Querying within box box = [ [40, 40], [60, 60] ] Article.where(:location.within => { "$box" => box }) box = [[40, 40], [60, 60]] db.articles.find({location : {"$within" : {"$box" : box}}}

Alternativas? Geohash PostGis (PostgreSQL) SpatialLite (SQLite)

Just Build It: You don't need anyone's approval and in fact, you probably won't get it, so don't even try Kevin Rose - Digg

Geolocalização com MongoDB e Rails

by Maurício Maia on Aug 23, 2010

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