Android mini-game fixes (read description) only small fixes

Hi, I am looking for someone to fix a few issues with my mini-game, I have a map system that draws tiles to screen I am trying to limit that to only draw what is on screen but it seems my values may be off. Also if you can look over my coordinate converting functions and edit them to make them return a correct value, as well as my maps zoom, the gesture is in place but it seems to be jumping when I pan down and zoom in and it. Another fix is my zooms gesture when you release one finger it does not revert back to panning without having issues with wrong coordinates I would like it to start panning when you lift your second finger as well as a controllable speed on the zoom. All these features are in the code just need small fixes with values and offsets to get them working.