This file determines the initial area when the game starts and location of the screen view.
The first column is filled with th identifiers AREA, XPOS and YPOS, with entries for normal, tutorial and multiplayer game modes. AREA defines the start area, XPOS and YPOS determine the location of the screen view. The second one holds entries specifying values for the first column.
In BG1 TotS we have:

2DA V1.0
BADVAL
           VALUE
START_AREA AR2600
START_XPOS 1080
START_YPOS 530