>I am trying to export a map file from Epanet to Autocad LT. The map files in epanet are quite good but it is better for reports if they have things like cadastral, topography and other things on them.

If you want to overlay topographic / cadastral mapping with your model, I would suggest you approach things differently.

First, the EPANET maps represent all pipes as a straight line between two nodes - not exactly the most accurate representation. Overlaying a map with "real" features with an EPANET map could look rather silly - with lines cutting across lakes, subdivisions, etc. or through buildings etc. I'm sure you would agree that this would probably distract the reader a bit.

Possible solution: construct your model graphically.

Draw your model in any graphic program directly overtop of your prefered base plan. From there, you have a number of options.

1.) use the graphic image to create the map file (instead of the other way around). This can often be accomplished fairly simply with a script command to process the layer upon which you placed your nodes. Then finish off your input files as you would normally.

2.) work a little smarter. Create the model in a graphic format, like AutoCad, but use either attributes or a database linkage to record basic information like node number, etc. and use a script to create both your input and map files directly.

3.) spend a little money. Buy a canned package that integrates graphics with an EPANET engine and let it do all of the above for you. (by now, I'm sure you have heard from one or two - they tend to lurk around this list and others)

I would suggest to you that if you are content with the maps you get from EPANET - use the output you get directly from EPANET. If you want something more, then you need to spend a little money either developing your own interface or buying one someone else has put together for you.

Just my thoughts - ask around some more and see what others tell you.
Steve Jollineau, P.Eng.
slja@oln.com