Hec Ras and GIS

[dimitris]

Hi to all. I am new to hec ras and arcview and i want to ask what type of terrain to buy for the arcview. I dont distinguish the difference between DTM,TIN and DEM.I uppose i have to ask for a DTM for the main channel and the overbanks and a DEM for the floodplain areas besides the river.I am not sure about it. i am going to buy the DTM from the geographical service of the army and i want to know exactly what i need and what's the best for my work.It would be very helpful if you could give me some information.Thanks

Here is a good place to start:

http://www.crwr.utexas.edu/gis/gishydro02/GISHydro2002.htm

Also the ESRI site is loaded with tutorials, data, etc. www.esri.com

Ron Kilmartin
ronkilmartin@attbi.com

Hello All,

I can give detailed information bout the use of GeoRAS, besides about the differences betwenn TIN, DTM and DEM, and GIS topics in general. If someone still need it, fell free to mail me. Puedes escribir en Espanol igualmente.

I'll be glad to help,

Sincerelly

Hugo Avila
hugo_armandoa@hotmail.com