location aware sound level meter for iPhone

I want to develop a sound level meter application for iPhone which computes A-weighted equivalent noise level (LAeq{1s}) every second. In addition the LAeq{1s} need to be attested using GPS data (latitude,longitude and time) . Finally, the information tuple <time,longitude,latitude,LAeq{1s}> need to be written in a (text) file in the phone memory. There should be another option of uploading the data in a specified mysql server database located in a remote server (server authentication and address will be provided). While pressed the upload option the data should be uploaded and erased from the phone memory.