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Nick C

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  1. I have a project going where I have outline the banks of a stream, as well as the centerline. I then make cross sections and exctract the cross-sections. If I go into the cross-section attributes, I am able to see the prfile, correct cross-section information, and assigned to the proper reach. When I export the file into Hec-Ras, all that transfers is my centerline data. No cross-section data is making it over. It says it canot find my cross-section .idx file. I have this file, and browse for it manually, but it still comes up with no cross-section data. Nick
  2. Thank you, I believe I have figured it out.
  3. I had a question regarding my conversion of shapefile data to DEM. I am working on a project that requires using shapefile data at 10 ft. contours. However, in order to get cross-sections, I convert the shapefile data to Feature Objects, then a TIN, and lastly a DEM. I am then taking cross-sections out of the data. My question is why do my converted contours looks so far off from my original contours? The picture attached shows my original contours (grey) and my new DEM contours (yellow/green). The black line is a cross-section of a bridge crossing. As you can see, the cross-section is extract from the TIN data (aka the DEM contours) is a horrible representation of the original data. I ave many cross-sections, and editing them all would be a pain, and would also not show a true view or my routed river if I run is it through HEC-RAS. Can I get my DEM/TIN to match my original contours, and just interpolate between the original lines? Bad Contours.zip
  4. I will try to be more exact. Here's an example: I have a dam that is currently impounding a lake. The 1st lake runs into a 1st river reach, which runs into a 2nd lake. The 2nd lake is also impounded by a dam, which runs into a 2nd river reach. The 2nd river reach runs to a 3rd lake. I know it is easy to model the 1st lake, dam, and river reach. However, HEC-RAS seems to not want to add a second lake, unless I want to end on that lake. Basically, I can only have a lake, then river, then lake, and nothing more. If I want to add a lake in between these two lakes, I need to model it as a storage area, which does not seem correct, hydrologically. So, it seems I would have to split this up into two models, and use flow results from the first model to help model the second model. Does this make more sense? Am I correct or wrong in my assumptions?
  5. Chris, Thanks for the reply. I believe what WMS does is fine. I was jsut hoping that it could possibly do more, but I don't think it could even if it wanted too due to HEC-RAS limitations. I am just wishing HEC0RAS allowed you to model Lakes and Ponds In-Line with the river. I will have to look at HEC-RAS more. On another side note, does HEC-HMS or any other program let you define lakes/ponds in-line with the river, and do dam breach routing for flood inundation maps, then import back into WMS? I am still trying to learn the best way to model what I need....
  6. So one of my first projects with WMS/HEC-RAS involves an entire river system, with multiple lakes and dams along the entire system. I understand how to bring cross-sections and dams from WMS to HEC-RAS. However, how do I model the lakes that the dams actually hold back? My basic understanding of these two programs shows that on HEC-RAS I can model Storage areas, and I can connect the Areas to a certain cross-section. Can I place a connection for a storage area (aka my lake) on the cross-section that drains into the lake, and then another connection on the cross-section that models my dam? Also, if I model a storage area on HEC-RAS, what will read back into WMS? Will it work?
  7. I am having issues with my shapefiles. I may need to send an example file to someone. Basically, I am trying to convert my shapefiles to DEM's, and step one would be to convert to feature objects. In the tutorial under step 3.3.1, it says to map attributes. These attributes are DRAINTYPE, LENGTH, SLOPE, DMANNINGS, and BASINID. Now when I get to this step, my shapefile has multiple selections that can be mapped, including those with the following names: CONTOURS_I, UNITS, ELEVATION, FMSRC, FMSRCORG, FMPROCS. Basically, I do not see where I can map attributes to carry along the correct information needed for the DEM. These attributes do not correspond at all to the tutorial, but I do not want to lose data while converting.
  8. I understand all the steps in the tutorial. my problem is that I do not have .dwg files. I have .shp files. Are the steps the same?
  9. Need help with the right steps for converting from shapefile to DEM. I have multiple shapefiles that I am trying to convert into one DEM file. I have tried using the GIS module to convert to feature objects, and then use the map module to make polygons for tining. But when I try to make the polygons WMS freezes up. It gets to 1% complete and then stops. I have let it sit for 20 minutes without a change. When using smaller files, I am getting issues with open contours obviously not wanting to be polygons. Is there an easier way to do this other then edit all of my shapefile lines to closed? Also, after I convert to feature objects, when I get to the mapping preview it is showing nothing in the box but a column with numbers 1-10 in it. Is my original data the problem here? Help? if possible.....
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