Downtown,
I get the black water bug too. HT knows about it. Some get it, some don't.
If you run your cursor over the terrain in the AH editor (so the red 'x' appears), in the top right hand side of the screen you can read elevation and terrain type (and some x/y position numbers).
My tool will take whatever you have in the window and squeeze it into a 512x512 area.
-Ogre