百度地图API开发指南:http://lbsyun.baidu.com/index.php?title=webapi/guide/webservice-geocoding
返回附近商圈:
http://api.map.baidu.com/geocoder/v2/?callback=renderReverse&location=39.983424,116.322987&output=json&pois=1&ak=您的ak
http://m.blog.csdn.net/article/details?id=51744913