How to implement geo-positioning

IP Address, GPS,WIFI,GSM/CDMA
Location acquisition Process:
1. The user opens a web app that needs to get a geographic location.
2, the application to the browser to request a geographical location, the browser pop-up query, ask users to share geographic location.
3, if the user allows, the browser from the set to query the relevant information.
4, the browser sends related information to a trusted location server, the server returns to the specific geographic location.
The realization of geographical position
1. Enable browser-based (no backend support) to obtain the user's geo-location technology
2. Accurate positioning of the user's geographical location (accuracy up to 10m, dependent on the device)
3. Keep track of the user's geographic location 4. Interact with Google map, or Baidu map to render location information

How to implement geo-positioning