flacky Jones's List: Géolocalisation

• Your model must have two attributes (database columns) for storing latitude and longitude coordinates. By default they should be called latitude and longitude but this can be changed
• For reverse geocoding your model must provide a method that returns an address
• your model must tell Geocoder which method returns your object's geocodable address
• For reverse geocoding, tell Geocoder which attributes store latitude and longitude
• Geocoder adds a location method to the standard Rack::Request object so you can easily look up the location of any HTTP request by IP address.
• Note that this will usually return nil in your test and development environments because things like "localhost" and "0.0.0.0" are not an Internet IP addresses.
• To find objects by location, use the following scopes:
• When you run a location-aware query the returned objects have two attributes added to them (only w/ ActiveRecord):
• Geocoder supports a variety of street and IP address geocoding services.
• Some common configuration options are:

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• L'opération de géocodage est automatisée à l'aide d'un géocodeur. Un géocodeur peut être une solution logicielle, une brique logicielle ou un service en ligne (API).
• Il peut être nécessaire de convertir les coordonnées fournies dans un autre format avant le placement sur une carte par exemple

• Listing 1. Repérer un utilisateur : getCurrentPosition

   

  navigator.geolocation.getCurrentPosition(     successCallback, errorCallback, options);