Latest Contributions by JohnGaiot

‎07-18-2019

Here you go: https://community.esri.com/thread/105831-arc-hydro-installation-versions-and-documentation Yes you're right.. they are responsive when it comes to infrastructure, cartographic and online type applications. Their user base is large and some 'niche' users are left struggling, but we'll have to adapt one way or another eventually. Cheers, John

‎07-17-2019

Hi Jacob. There are several reasons why we decided not to take the jump to Pro.. this being one of them. But I imagine the Arc Hydro team is getting close to a viable update (I would keep track of their main thread for this). They're not totally to blame though. As an 'old school' programmer, I've always exercised the concept of 'backwards compatibility' when versioning software or you run the risk of upsetting or alienating your user base (and I sort of see the Arc Hydro team as part of this 'user base' even though they are affiliated with ESRI). In Pro, the decision not to support traditional simple geometric networks (forcing folks towards the more complex Utility Network model instead) and dropping the ability to view read only fields on toolbox forms are a couple things that have really irked me personally. I've raised these issues as well, but they are not seen as priority which is unfortunate. But the main reason is we've built a lot of Python tools for specialized auto processing of large datasets and producing informed status updates/error reporting which Arc Hydro alone lacks.. so for us to needlessly rework the entire workflow (which works perfectly fine otherwise) just makes it not worth our while to port over to Pro. For the foreseeable future, we're sticking with ArcGIS Desktop for surface water related processes, and may also explore open source alternatives (Whitebox is a promising contender for handling LiDAR big data in surface water applications).

‎06-24-2019

Basically I'd like to keep all the attributes from the record with the lowest OID. I am dealing with a large scale watercourse dataset that has hundreds of small gaps in the original capture. Most of them are within 4 metres, and so by performing a Near Analysis on the from and to nodes of the dangles, I can create a line feature class from the From-XY and To-XY attributes to connect them. But the merging part has me perplexed...

‎06-24-2019

Hi Joshua, I am very much interested in how you would apply the merge functionality using arcpy. To answer your question, I would like to merge to the lowest OID feature. Thanks.

‎03-13-2018

Hi Christine, I have installed the latest version of Arc Hydro for ArcGIS Pro. The commands seem to work fine from the toolbox, but is it possible to call the commands from a python script? In the ArcGIS desktop version, we would just use "Import ArcHydroTools" to setup the environment. However, this does not work in Pro. Is there a different module, or is this functionality not yet available? Many thanks!

‎03-13-2018

I tried manually typing in the import command in the Python window, which works with the standard modules. But when I try "import ArcHydroTools", I get the same "No module named.." error. Either the name of the module for calling Arc Hydro has changed or is nonexistent / not available for this version of the tools. We have automated much of our data processing with rather complicated scripts which would not be easily translatable to the Model Builder environment. Nor would I want to do that when I can just stick with ArcGIS Desktop..

‎03-12-2018

Hi Stuart, It took me a while trying to find where Arc Hydro installs itself. The MSI installer does not tell you where it will install, and explorer does not search the "Program Files" folder for some weird 'security' reason (I tried typing "ArcHydro" as my search parameter from the C drive and only files I created referencing Arc Hydro or files I opened recently came up). So through manual sleuthing, I found Arc Hydro 'Pro' installs here: C:\Program Files\ArcGIS\Pro\Resources\ArcToolBox\Scripts\ArcHydro (or likely it will install wherever you chose to install ArcGIS Pro) I then proceeded to follow your suggestion, and it seems the AH install was smart enough to do that part for me. There was already a archydropython.pth file located in said "site-packages" folder with the path above already in it. Let me clarify, the individual tools within the Arc_Hydro_Toolbox_Pro.tbx do run okay on their own. It's when I try calling the functions through ArcPy it bails with the following message (my script is called "2. Create EFD**" just in case you're wondering what that means): Start Time: March 12, 2018 4:18:23 PM Running script CreateEFD... Failed script 2. Create EFD** ... Traceback (most recent call last): File "Z:\GI\ProvincialMapping\Tools\Python\MNRF_TerrainProcessing-JG-2017-08-09\TerrainScripts\Step C.2. Create EFD - master.py", line 38, in <module> import ArcHydroTools ModuleNotFoundError: No module named 'ArcHydroTools' Failed to execute (CreateEFD). Failed at March 12, 2018 4:18:24 PM (Elapsed Time: 0.59 seconds)‍‍‍‍‍‍‍‍‍

‎03-12-2018

Thanks for this tip! I'll give it a try hopefully this afternoon and will report back if successful.

‎03-12-2018

Unfortunately no readme file currently comes with the MSI file that I can see. Would be most helpful

‎03-07-2018

Thanks for the tip for adding the toolbox, but I am still getting the same error. Either the python functionality isn't there yet or they changed how to access it.. which would be unfortunate, since many of the standard tools are accessed exactly the same way under both platforms (with a few notable exceptions - but they're usually well explained). The same should hold true for Arc Hydro.

‎03-05-2018

Yes I tried installing the latest version listed there and no luck. I couldn't find any documentation either on this site.. it's all old help files for ArcGIS.

‎03-02-2018

Hello, I am testing some python scripts created originally in ArcGIS 10.3.1/10.5.1 which utilize the ArcHydroTools module. I have installed the latest Arc Hydro package in ArcGIS Pro, but it still doesn't recognize this module. I get the following error when trying to import the module: " ModuleNotFoundError: No module named 'ArcHydroTools' " Is this functionality not yet available? Or should I be doing something else? I tried scouring the documentation but it all relates to ArcGIS desktop not Pro. Not that I could find anyway! Thanks in advance, John

‎02-01-2018

Thanks Dan for the quick response. I thought I'd try my hand here first, but that is a good suggestion. Cheers.

‎02-01-2018

My ministry is currently performing some platform testing before we officially migrate from ArcGIS 10.3.1 to 10.5.1. Our group has been asked to participate and I noticed an issue when working with ESRI Grids in one of our native projections: NAD 1983 Ontario MNR Lambert. On 10.5.1, it can read the projection in ArcCatalog and even set the data frame in ArcMap to this projection, but when I add the grid into ArcMap, the projection reverts to the older projection name: NAD_1983_Lambert_Conformal_Conic. When I take it back to 10.3.1, the projection name has indeed changed to the old name. NAD_1983_Lambert_Conformal_Conic no longer appears as an option in ArcMap, so it might be a legacy "ArcInfo" translation nuance that has changed. The parameters for these projections are identical but since it applies specifically to Ontario, I understand this was the rationale for adopting the new name. But for some commands in ArcGIS, this becomes an issue because they will think they are different projections even though they aren't, and because of this, will not work properly. I tried redefining the projection in ArcMap to Ontario MNR Lambert but nothing happens. I have to go back to 10.3.1 to successfully redefine it. This phenomenon only happens with ESRI Grids. I tested rasters in file geodatabases and ERDAS Imagine file formats with no apparent issue. I wish I could just abandon the ESRI Grid format for many reasons, but we have several tools which still write to this format and it would not be an easy fix to convert formats. It would take days if not weeks to reprogram, retest, etc... And since ESRI Grids are still supported (I have yet to hear otherwise), is there a known fix for this type of issue? Thanks in advance.

‎01-19-2018

This is not very useful if you don't have access to SDK, which requires Visual Studio to be installed. Useful tools that were available in ArcGIS should be made available in Pro without having to install resource hogging SDK's and third party tools that may or may not be actively supported.

Online Status	Offline
Date Last Visited	‎01-16-2026 09:11 AM

My Ideas

Latest Contributions by JohnGaiot

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Is there an ArcPy method to merge polylines within the same layer?

Re: Is there an ArcPy method to merge polylines within the same layer?

Re: Arc Hydro Setup Versions and Documentation

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?

Calling Arc Hydro Tools in Python in ArcGIS Pro?

Re: Problem with ESRI Grid Format in 10.5.1

Problem with ESRI Grid Format in 10.5.1

Re: Add old pixel inspector to arcgis pro

Re: Change symbology of an existing layer through ...

Programmatically Clipping and Resampling an Elevat...

Re: Blurry basemap in Pro layout view

Re: This New Platform Update Messed Up My Account

Re: Why can you no longer display disabled Python ...