a suggestion about my position

[blackcd]

after i downloads map from google, i found that my position is not so right,but the error have some regular,and i got the gps from ditu.google.cn ,he give me a gps data,and this data is not same with my phone,so i think the feature version can hava a function that can change my current gps data ,+/- current data,to regulate map data(change map data is a large workload and every one changed is different......),hope you can use my idea