Nearby locations-I would like to develop a Web page similar to the mobile phone side of the United States, the main implementation of a function to achieve near the merchant

Nearby Location PHP imitation American group positioning HTML5

Follow the United States group or Baidu map to achieve the user's location information and then realize from the database to identify the surrounding merchant information. See the Baidu Sticky rice Android Client and version of the Web page, unexpectedly the same location around the merchant's distance unexpectedly different, I also encountered this problem, in doing when used is Html5 to obtain latitude and longitude method, with the calculation of two points between latitude and longitude distance method But why not calculated out, Ask Daniel to guide the realization of the United States, I would like to do the same as the American group. Note is the PHP language in the above implementation of the technology, Daniel Help

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