I encounter an error while following "Tutorial 4: Create 1D BASEchain mesh from a DTM using HEC-RAS/ HEC-GeoRAS".

I imported the (.g01) mesh into Basemesh  two shapefiles (mesh_points.shp & mesh_crossSections.shp) are added to the TOC. But when i try to Export the 1D mesh (.bmg) it gives the following Error.

"error, there are no cross sections present".

The only way I could solve the issue was to put a certain slope on the banks, rectangular (or with 0.00001 inclination) did not work.
Thanks

Thanks for your reply. The cross sections were existing data given to me in shapefile, I have both the points as the polylines. I have checked, the nodes of the polylines all have a valid X and Y coordinate. I only have 2 columns in the attribute table though (one string and one integer) which just indicates a number and name for each cross section. Perhaps there has to be some data there?
I am using QGIS 2.18.28 (I had other issues with an older and newer QGIS version with Basemesh). I am using Basemesh 1.4.3.

Thanks
Alyssa

slices are numbered from 1 to n where n = m - 1 and m is the number of nodes you have on your cross-section.

If you define a rectangle with 4 points, you will have 3 slices, say a wall (slice #1), the main channel (slice #2) and the other wall (slice #3).

Now, if you want to set some parameters slice-wise, just refer to the numbers
If for instance you want to set some parameters only on one slice (e.g. the second) in the _slice_indexes boxes you just write (2,2) and you are referring only the the second slice. Otherwise you could set parameter on more than one slice using a range (1-3 --> (1,3)) or a separated list (1 and 3 --> (1,1), (3,3))

Hope this helps!

Best
Matteo

I am getting following error,' Parse error near line 16, col 0: Closing of the root block found'. As i thought it is about some block not being closed but when i open the run file in editor, it goes through normally. Same error in v 2.6 and v 2.7 repeated. Any suggestions?
Regards

I have a question about the python script Gewiss2Basement. Is it possible to have an example with which python script works?

Thank you very much,

Best regards

However, the error message used the word 'stringdef' which is not part of the geometry in 1D basechain, so it caused the error to be not quite apparent immediately.

Regards

I cannot execute my HECRAS2basement script due to a problem with PyQt4. Seems PyQt4 is a bit out of date and has been replaced by a newer version (PyQt5, it seems) recently? I have some problems getting the PyQt4 package to get installed/work on my computer (Windows 10 Pro 64 bit).
What do you suggest such that I can still use HECRAS2basement?
Maybe any ideas on how to get my computer to use PyQt4, or could the script easily be updated such as to use the newest packages?

As additional comment on that issue, I think some of the python scripst (mainly HSR ones I think) have been designed for Linux use. I needed to perform some changes prior to use on Windows. Since - in my opinion - most engineering companies use windows only (just like me), and most engineers are not experts in python programming (just like me, too), may I politely suggest as a secondary goal in development that you ensure windows compatibility in future versions of such scripts?

Thanks for your advice.
Ingrid

I was trying to enter a circular pipe section through bmg file in basechain. Apparently, bmg file is not allowing that. Under the present condition, can one do that or does one have to wait for a new version? perhaps there is a way out, if so kindly share.

Regards

thanks a lot! This looks very promising, I will have a detailed look on it for sure.

Regards Stephan

Best, Lukas

there are two inflows

the distance between cross-section to cross-section will increase from B to A or A to B for such channel ?

hope this explains my problem clearly

regards