主播大秀

offers us the chance to try out some new technology, and you can get involved.

If you're going to be there to see our Olympians and Paralympians, you can add your photos of the day to our .

If you're not going, you can use the map to follow instant photo and text updates from points along the route.

And if you see someone in the crowd holding a mobile phone out in front of them like a sacrificial offering to the skies, that will be me trying to get a GPS fix.

We'll be uploading images to the map using a combination of (global positioning), a mobile phone camera and two web sites - and .

We've combined all this technology in a way that whenever a photo is taken with the phone, it should show up immediately on the map, automatically positioned according to where I was standing at the time.

Similarly, my colleague Tom Fordyce will be armed with another phone and will be sending in text updates - again, plotted automatically on the map according to the satellite fix on his phone. The text updates use and a very helpful, free add-on named .

It's clever stuff, and it allows us to tell the story of events in a complex, live, graphic environment for the first time. In the future, mobile technology like this could help us cover big sporting events (for example, Wimbledon or the Open golf) in new ways.

Along with geo-located Twitter updates on the in August (read more about that map here), this map marks the debut for this in 主播大秀 Sport's coverage.

It remains very much a developing technology, and isn't 100% reliable. If you've ever used satellite navigation devices in your car, and found yourself frantically pointing upwards when it suggests it "cannot locate satellite", you'll know what I mean.

But it's exciting to put it to use, and if you know your way around cameras, geo-tagging and the web, get down to the parade then head to to add your pics. See you there!