What is a RAW file for TOWER! 2011?

[gazzerd]

Hi,

Newbie question again.

Playing with Airfield graphic file creation and having great fun. A bit perplexed by meaning of RAW file format for some of the graphic files.

My understanding if RAW is that it to s a non-standard format - commonly associated with camera manufactures and other imaging device outputs. The actual format being 'custom' to a specific device manufacture.

So, I'm asking, how do I know what specific internal format to save my files and in? In using GIMP + one or two other graphics packages and need to 'tell' applications how to output/export.

Anyone out there who could guide please?

Regards

Graham