If I may borrow your handle for a moment, Steveegg, to answer a post isolated by the thread change...
Certain_Doom wrote:
"To: jeffers
What is that program you are using to simulate flood waters?
1,543 posted on 10/22/2005 3:50:32 PM EDT by Certain_Doom"
Those go through a chain of different programs. I use Netscape to FTP down the elevation and other datasets, IE where Java is required so I can keep it turned off in Netscape, 3DEM and or MicroDEM if I need to merge multiple datasets, 3DEM or Global Mapper to artificially raise and surge/sea level, and Photoshop to size, annotate and prep the end result for uploading.