RAS mapper 5.0 inundation boundary is jagged

[Anonymous]

Hello.

My inundation boundary is a jagged line. I didn’t have this problem with Mapper in RAS 4.1, with the same terrain and RAS files. Is there a setting I am missing?

Here is a link to an image showing the inundation boundary: https://docs.google.com/document/d/1Kya4mj3qXibtdQuqBj7VwSBFsiyV13YqUNP1glPuZNY/edit?usp=sharing

[Michaeltay]

Have you try using different rendering mode in the official release of HECRAS5?
Right click on Result in RasMapper and try it out. That might solve it.

[Anonymous]

Thanks for the suggestion. I tried that, but it didn’t seem to make a difference for me.

I think I fixed it. I exported the surface layer from GIS to a new GeoTIFF elevation surface, but this time, I made the sample spacing grid 1 ft x 1 ft (instead of default 10ft x10ft). I then imported this as a new terrain in RAS Mapper.

This resulted in a smoother line (see new screenshot below). Funny, I didn’t need to tighten up my surface to that degree with 4.1 RAS Mapper.https://drive.google.com/file/d/0B8uRA6N_hFgLRmNkeG5wOF92M00/view?usp=sharing

[RCampos]

Finally do you find why the Inundation Bondary SHP exported was jagged? I have models in certain pc that can export smooth surface but in other pc not. In both computers I can view smooth results in RAS MAPPER with Slope render mode, but when export the inundation boundary, one of them creates a jagged shp.

Someone have the same problem?

[Graeme M.]

Sometimes it looks jagged if the terrain is not properly associated to the results layer. Did you assign the terrain?

[RCampos]

Yes, the terrain is the same. The problem is when I generate the inundation boundary shp in RAS Mapper, save this file and open this Shp in GIS software, the inundation boundary is jagged.

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