Map calibration step 1

Hi,
first step of my map calibration is done. The calculation is much easier and will be shared later. Don't hesitate to improve it or to give some usefull comments. A test map is included.

Very slow with bigger files

Hi Erel,
I tested the scrolling and magnifying with big files (11 MB jpg and 27 MB bmp) and it's very slow now. How can it be improved. Tested on a new computer (DualCore 2,2 GHz, 2 GB RAM, XP SP2). May be you can help?

Hi wolfgang,

Maybe it could be faster taking every time a smaller part of your map.
Take a look here http://www.b4x.com/forum/showthread.php?t=1403 for doing this during runtime