iphone maps GPS icon

I would like to make a 开发者_StackOverflowbutton that centers the map on the current GPS location. Google Maps app has that icon on bottom left. Where can I get that icon. Is it embedded in the SDK?

That button image is not publicly available for use in the SDK. This question was asked recently on SO but I am unable to find the original question, perhaps someone else will be able to dig it up. This free icon set (http://glyphish.com/) has one that is pretty close.