Yay, correct. Either my memories are still good or yours are as bad as mine.

But it was indeed my intention. It may also be the only map layout I (kinda) remember from any game ever.

Ah, now we know where ID software cropped their cacodemon doom sprite from.

Doom

I have the map for the game hanging on the wall next to me, and it is very similar in a crude sort of way. Also, while Cordon is in Clear Sky as well, you get into the area bit further south, so I suspect you would have put something in between the safe area and the southern military base if that game was your intention.