SCANG.DAT
General Information
SCANG.DAT presumably stands for SCANner Graphics, because the images stored in it are used on the overhead map, which the game refers to as the Scanner (see also: UFOGRAPH/SCANBORD.PCK).
Each image is 4x4 pixels and represents a particular tile or map object. The game uses MCD[20-21] as a reference for which image to use: MCD[20] + MCD[21] * 256 + 35 (The +35 is due to the fact that the first 36 images (0-35) are for objects on the map).
