convertCoord            Convert coordinate from different coordinate
                        systems to AutoNavi system
convertCoord.individual
                        Convert an individual coordinate from different
                        coordinate systems to AutoNavi system
extractAdmin            Get Subordinate Administrative Region from
                        getAdmin request Now, it only support extract
                        the first layer of subordinate administrative
                        region information.
extractConvertCoord     Extract converted coordinate points from
                        convertCoord request
extractCoord            Extract coordinate from location request
extractLocation         Extract location from coordinate request
getAdmin                Get Subordinate Administrative Regions from
                        location
getAdmin.individual     Get an individual data.table of Subordinate
                        Administrative Regions from location
getCoord                Get coordinate from location
getCoord.individual     Get an individual coordinate from location
getLocation             Get location from coordinate
getLocation.individual
                        Get an individual location from coordinate
num_coord_to_str_loc    Take longitude and latitude from location
                        string out.
str_loc_to_num_coord    Take longitude and latitude from location
                        string out.
