Latest Contributions by MarkBoucher

Thanks! I looks like that was a while ago. I'll look into it. ... View more

I pulled up an existing project, and tried to run the tool. It failed because the BatchPoint feature class did not have a HYDROID. I add the field "HYDROID" making it "floating" as I saw HYDROID was in other feather classes that have that field (Catchments, etc.). Then I use the ApUtilities menu function "Assign Unique IDs" and choose the BatchPoint feature class. This assigned HYDROIDs to the batch points. I had to do a "refresh" on the table to see the numbers. I then ran the tool and it worked for me. I only had 2 batch points. Using ArcMap 10.1, Advanced (Arc Info) and Arc Hydro for ArcGIS 10.1 (version 10.1, September 6 2013). ... View more

So it freezes without any error messages? ... View more

Not sure. I believe the tools can be called from Arc Python, but I'd like to see some Arc Hydro specific code so I can make an easier transition from Model Builder to Arc Python. ... View more

One other thing that may help (and the files are related to DEM Reconditioning...) Put the agreestream layer  (and inner and outer walls) in a geodatabase. When I started using this practice, things seemed to run solid for me. At the time I had "heard rumor" that regular shape files were "less stable" than geodatabases, so, I gave it a try and it seemed to help. ... View more

I now recall a big project I worked on a few years ago. It was a batch subwatershed delineation problem, not an adjoint catchment problem. After finding the batch subwatershed delineation not working for some points, I started doing the batch subwatershed delineation in groups. I found when I did this I got acceptable results. It was frustrating since my work was somewhat iterative - I'd run the process, see a needed change, and run it again. I think I created a new field in the batch point table with 1, 2, 3, etc. in the field for the different batch point groups I wanted to run. Then, maybe using model builder (that's what I would do today), I selected a group based on that field, ran the batch subwatershed delineation, selected the next group, ran it again, etc. At some point I found how to group them to get a successful process. This was a long time ago in Arc Hydro 9.x. I may not have been working off the local drive, and I've learned a bunch more since then. Point is, I don't know if it was a problem with that version or my approach to "managing the monster" that was causing the problem. ... View more

What you are doing with the SA tools is the same thing that Arc Hydro does. Arc Hydro is an ESRI product free for the downloading. If you are doing a one-time project, the muscling it through SA is fine. If you will do this again and again, then you may get and learn Arc Hydro. Everything that Arc Hydro does I believe you can do with SA. However, Arc Hydro goes way beyond the simple tasks. The concept is simple. Start with a raw DEM, "burn in the streams" using polylines for the drainage system or streams. Convert the stream layer to a raster with a big value and subtract that from the DEM. You can burn this deep, real deep. The next thing to do is to "build walls". Here you create a raster from a "wall" polyline or polygon using a big value. Then you have to "breach" the wall using the stream raster. Then add the results to the DEM. This raises the DEM where you need the flows not to cross. You need this to be at least 2 cells wide or the flow will "sneak" through the corners. After this is done you need to fill sinks. If you don't fill sinks, when you do the flow direction, some will end in the sinks and not where you want the flows to go. Once the flow direction is final, then the rest of the watershed analysis should go smoothly. There are occasional situations where you need to revise the flow direction (adjust flow direction with streams in Arc Hydro), but I find this to be a rare occasion. Good to be aware of it though. Arc Hydro has a flow trace tool that would make it worth installing Arc Hydro anyway. It allows you to click on a cell and see which way the flow direction goes. Since this is process is always iterative for me, I use model builder so that I can easily rerun the process as I make minor corrections in the stream polylines or wall polyline. Arc Hydro comes with some ready-made model builder tools and workflows. I copy and modify these for my use. There is a Arc Hydro  discussion group where you can get help from the community. I created a discussion in that forum a while back called ArcHydro Problem Solvers. If you want to try using Arc Hydro, it might be worth perusing that discussion. ... View more

I've heard that having different projections can cause problems in geoprocessing that otherwise don't make sense. I've always worked with data that was from our own data managers and therefore on our standard projection, so I've not had to deal with the different projections. So, see if the projections are different in your layers. ... View more

Early on I eliminated crashes, or at least reduced them, by putting all my layers on the C: drive. Before that I had all the data on the network. Moving the data to my PC not only greatly reduced crashes, it sped the processing time up noticeably. ... View more

Are you following a process that includes filling in the sinks? ... View more

I looked at an old project with multiple catchments that ran successfully. I don't see a "RiverOrder" field in the Catchment attribute table (see attached). Could it be that another process other than the minimum I use put that field in the table? ... View more

Is a frustrating issue. We have a ap called "WhereHaveAllTheLicensesGone.exe". At least I can see who has it locked and get them to turn SA off on their machine. ... View more

Almost looks like the fill sinks step hasn't been run. ... View more

I Google searched the error and found this. Error in DEM Reconditioning in Arc hydro 10 ... View more