http://wiki.openstreetmap.org/wiki/Mercator
With the C# example in the above link, I am able to project lat/lon to x/y co-ordinates. However, I'm having problem with scaling. I wonder how much length (in miles?) each pixel have after projection. I would like to scale the map before rendering as 500 pixels per mile or something like that.
Guys, really nobody to answer this? It's been quite long without answer.