Latest Contributions by MarkBoucher

I have a lot of experience with the ArcMap version of Arc Hydro and some with the ArcPro version.  Some ideas... Make sure you confirm the processing extents cover your project. In the ArcMap version the processing extent would sometimes get changed for some reason I could never figure out. For example, the processing extent would be reset to match the limis of the batchpoints. A confusing situation I had to deal with. Make sure all layers (DEM and agreestream) are in the same coordinate projection. If the values of the AGREEDEM are "all round numbers," I assume you mean they are integers (e.g., 234) and not floating-point numbers (e.g., 234.56). This can happen during the "burning" process. The most likely cause is that one of the geoprocessing tools you used to subtract values from the RAWDEM is outputting an integer raster instead of a floating-point one. Check the output data type settings for the specific tool you used, and also verify the data type of your original RAWDEM. You want to ensure the final output retains the real number precision of your original data. (Some of this answer I got from Gemini [Googles AI]) ... View more

I was having trouble with ArcHydro processes and learned that my 16GB RAM was too little to deal with my large dataset. I got an upgrade to 32GB but have not been able to test it. The recommended RAM size for ArcHydro is 64GB. Mark ... View more

The errors say the file is being edited. If I saw this error, I would close GIS (this ensures everything is saved and I assume closes the edit sessions) and restart to see if that does it. I find ArcPro is easy to edit in but often find myself working “beyond the save” and having to go back to save edits (stop editing) before I can go forward again. Mark ... View more

Is there a way to create a code to loop through these and select the shapes that have both the same start and end xy and merge them? You may need to find a way to make sure the fields from the simpler one are the default unless the data in the field is different. Here is a crude conceptural code (not python at all) - sorry no time to make this perfect... for shp in shapes     select shapes in shape where [shp(start)=other_shapes(start) and shp(end)=other_shapes(end)                or shp(start)=other_shapes(end) and shp(end)=other_shapes(start)] # addresses those in reverse direction     if count(selected shapes) >1         merge       end if end for ... View more

I come at this from the engineering/hydrologist side. I've been learning GIS and Arc Hydro as I go. I don't know of any tools for ESRI GIS programs (ArcMap/ArcGIS Pro) that will take rainfall and transform it into runoff (flow). [aka rainfall runoff (RR) transformation ]. I found this article in a quick search but it is academic and may not be ready for real-world application:   https://www.sciencedirect.com/science/article/abs/pii/S235293852100063X.    If someone knows how to do all of the hydrology and hydraulic (H&H) calculations inside an ESRI GIS program, let everyone know.   In using GIS to do this in our agency below are the general steps I am aware of. I have done all of these, but not yet from start to finish on one project. Use Arc Hydro to delineate watersheds and gather input parameters for HEC-HMS. (HEC-HMS has some GIS capabilities built in, but it does not seem to have fully functional GIS tools yet. For example, it will tell you what the centroidalflowpath distance is, but will not display the centroidalflowpath for you to confirm - at least that was my limited experience. It may be possible to do the whole watershed characteristics and RR transformation in HEC-HMS. HEC-HMS will also deal with routing flows through reservoirs and down long reaches of streams/rivers. Use HEC-HMS to calculate the flows (hydrology) Use GIS to create inputs for HEC-RAS, likely using GeoRAS. (HEC-RAS has some very good GIS like functions in a sub-application that is started w/in HEC-RAS called RAS Mapper. HEC-RAS is also needed to model bridges. Run model in HEC-RAS. (hydraulics) HEC-RAS can run a 1D using (cross sections: cross sections can be input from survey information or cut from a terrain model. The careless use of a terrain model should be avoided. [caution: LiDAR based terrain of a creek under tree cover can be very poor.] or a 2D model using a terrain model [note same caution]. The model is run and the output can be in a put in a form (layer/raster) that is readable by ESRI GIS programs. Add the HEC-RAS output into GIS. We have created flows in HEC-HMS and, using the standard HEC-DSS format for the HMS output, read from the DSS file directly into HEC-RAS (1D model) to run an unsteady hydraulic model to evaluate the creek capacity. ... View more

We have now discovered that the the points on the map began missing the text in the boxes happens in Chrome, but not in Edge on one computer, the happen on Edge, but not Chrome on another computer. This "dual dicotomy" has happened for two differnt people. The text is still missing on the iOS 18 platform. When we try to use a newer ArcGIS API for JavaScript (currently on 4.22) the problem does not go away and eventually, at some higher version, the API stops showing. This may require a makeover of the .js. ... View more

I noticed a few days ago that the issue is not just for the iOS 18 on my iPhone. It is also happening on Chrome Desktop. See my RainMap page and make sure you select Datasets>Season's Rainfall from the dropdowns.  https://www.ccflood.us MS Edge desktop does not have this problem. The other datasets chosen on the drop down don't have this issue of the text in the box not showing. When seen on an iPhone all of the datasets have the issue. Safari also shows the same problem with all data. ... View more

There is an iOS 18 update (18.0.1). It did not fix this issue. ... View more

Thanks for the detailed reply Dean. I'll take your words to heart and move forward. Mark ... View more

Dean, Thanks for the reply; really appreciate your response. I am generally conversant in the ArcMap version of Arc Hydro (AH) and the ArcPro version seems to be nearly the same. I typically only work with the AH tools when a project comes up. The latest project is a redo of one I cut my teeth on about 10 years ago. Unfortunately the layers from that effort wouldn't load into the latest version of ArcMap. I did have similar struggles with the AH in ArcMap, but maybe that was this low RAM issue that I was unaware of before now. So far I have run into a few things in the AH Pro version that seem different and require additional steps: The agreestream/breach line data now needs to be converted raster before DEM Reconditioning. This is easy to address with the polyline to raster tool. The Adjust Flow Direction in Streams tool now requires the Input Stream Flow Direction data raster as input. I'm struggling to make this work by converting the polylines with the correct direction into a d8 raster. I have been trying to do this in arcpy script, which I'm not perfectly conversant with. I have used AI tools (Gemini) help with the coding with some success, but didn't get it fine tuned last week. It was nice in the ArcMap version when I simply provided polyline data with the lines drawn in the right direction. I am asking my IT group if they could upgrade my RAM. In our organization (in the past at least) tailoring computers has been very hard to achieve. One idea I had was to add the "bookkeeping" effort of dividing the larger watershed into smaller working parts then merge the hydrologically correct DEMs together and do the rest from that. I do realize I could still struggle due to low RAM issues. I've attached a snapshot of my rawdem properties so you can see the basic size of my data. We have defined subwatersheds that I could use to break this into smaller parts. FYI - I've always used ModelBuilder to put the processing steps together. It would be good to know if making models of the process increases the memory use or cause any other issues verses simply using the toolbox tools. There is no toolbar now as far as I can tell other than three tools under the Arc Hydro ribbon. Since there are pre-made models (such as Basic Dendritic Processing), I assume using ModelBuilder a reasonable practice. Thanks, Mark ... View more

This also happens to me frequently. When I close it askes about saving anythng that wasn't saved (layer, modelbuilder model, project itselft). When I open it again all is well (whew!).  Clicking the refresh button doesn't fix it, only restarting does. ... View more