This document summarizes the W3C Geolocation API specification, which provides a JavaScript API for accessing geographical location information in a web browser. It allows websites to get the user's location using getCurrentPosition() and watchPosition(), and clear location monitoring using clearWatch(). The specification details the features and how it works, and provides references to learn more about using reverse geolocation and where the technology is headed.

1. HTML 5 Geolocation
Wait, I mean W3C Geolocation
Andy Pemberton,

2. navigator.geolocation
getCurrentPosition(successCallback, errorCallback, options);
watchPosition(successCallback, errorCallback, options);
clearWatch(in long watchId);

3. The Specification
• A JavaScript API that provides “scripted access to
geographical location information”
• http://dev.w3.org/geo/api/spec-source.html
• Features

6. www.andypemberton.com/geo

8. The “Old Way”

9. A few other thoughts...
• How does this work?
• What about IE...
• Reverse geolocation
• www.andypemberton.com/geo/reverse.html

10. Where’s this headed?

11. References
• http://dev.w3.org/geo/api/spec-source.html
• http://www.andypemberton.com/geo/
• http://isithackday.com/hacks/geo/distance.php
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