Using Project Freewheel's parametric API to make tiled maps:

Here is a single image from Project Freewheel:

http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.5&cy=0.5&scale=1&sec=3&width=300&height=300&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf<

Here are four tiles which add up to the same size as the original:

1. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.25&cy=0.25&scale=2&sec=3&width=150&height=150&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
2. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.75&cy=0.25&scale=2&sec=3&width=150&height=150&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
3. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.25&cy=0.75&scale=2&sec=3&width=150&height=150&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
4. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.75&cy=0.75&scale=2&sec=3&width=150&height=150&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf

Here are four tiles which are at a 2x higher zoom level from the original (meaning each tile has twice the number of pixels from above):

1. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.25&cy=0.25&scale=2&sec=3&width=300&height=300&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
2. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.75&cy=0.25&scale=2&sec=3&width=300&height=300&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
3. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.25&cy=0.75&scale=2&sec=3&width=300&height=300&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf
4. http://freewheel.labs.autodesk.com/dwfImage.aspx?cx=0.75&cy=0.75&scale=2&sec=3&width=300&height=300&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf

Here is the same image as above but without the tile borders:

1. http://freewheel.labs.autodesk.com/DWFImage.aspx?page=3&width=512&height=512&cx=0.25&cy=0.75&scale=2.0&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf' border="0" alt="top-left" style="position:relative; left:0px; top:0px"
2. http://freewheel.labs.autodesk.com/DWFImage.aspx?page=3&width=512&height=512&cx=0.75&cy=0.75&scale=2.0&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf' border="0" alt="top-right" style="position:relative; left:-4px; top:0px"
3. http://freewheel.labs.autodesk.com/DWFImage.aspx?page=3&width=512&height=512&cx=0.25&cy=0.25&scale=2.0&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf' border="0" alt="bottom-left" style="position:relative; left:0px; top:-4px"
4. http://freewheel.labs.autodesk.com/DWFImage.aspx?page=3&width=512&height=512&cx=0.75&cy=0.25&scale=2.0&path=http://freewheel.labs.autodesk.com/sample/Hotel5.dwf' border="0" alt="botoom-right" style="position:relative; left:-4px; top:-4px"