Specifies the viewport of the map in pixels. The point (x_view | y_view) corresponds to the top left corner of the rendered map with respect to the full map. Coordinate x goes from left to right, y from top to bottom. With mapsize 400 and skirmish one finds the borders
x_min = 32x_max = 5344y_min = 16y_max = 2536
which makes sense, as there are two tiles at the borders not rendered, which are each 16px wide and 8px high.