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ChristineDartig
Esri Contributor
since
07-04-2014
11-12-2025
235
Posts created
0
Kudos given
18
Solutions
63
Kudos received
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My Ideas
(0 Idea Submissions)Latest Contributions by ChristineDartiguenave
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-1 gets assigned to the lines having a TO_NODE that is not assigned to any FROM_NODE. If you look at your lines having NEXTDOWNID=-1 and check their TO_NODE field, can you find other lines having these values in their FROM_NODE field? Christine Dartiguenave Esri Water Resources Team
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05-29-2013
03:39 PM
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There was a bug in AdjointCatchment when run in geoprocessing background mode/ArcCatalog. This has been fixed in version 10.1.0.157 available on the ftp site. Christine Dartiguenave Esri Water Resources Team
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05-29-2013
01:24 PM
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The Stream Segmentation tool allows assigning the same unique value to stream cells located within the same stream segment. Segments are defined as either head stream segments (the most upstream stream branch) or segments located between two segment junctions. All the cells in a particular segment have the same grid code that is specific to that segment. The Stream Link is used as input by the Catchment Delineation tool (Link grid) to define the catchments as the subwatersheds draining into each stream segment. Note that the value of the Catchment Grid is the value of the associated Link, and this value is also stored in the GridID field for Catchment/DrainageLine and AdjointCatchment). Christine Dartiguenave Esri Water Resources Team
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05-29-2013
01:08 PM
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No you cannot do this in HEC-GeoRAS. The filtering needs to be done in HEC-RAS. Christine Dartiguenave Esri Water Resources Team
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05-28-2013
07:26 AM
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"VALUE=" + str(valaccu) is correct. You are asking for the minimum value in your grid ("MINIMUM") so accumax probably comes back as 0. This is why you end up with the final grid containing only 0. If you want the maximum value in your grid, change the parameter to "MAXIMUM". Christine Dartiguenave Esri Water Resources Team
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05-24-2013
08:23 AM
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What do you mean by "this did not work properly"? By definition a watershed represents the upstream contributing area for a given point, based on best available flow direction data. Christine Dartiguenave Esri Water Resources Team
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05-22-2013
01:55 PM
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This is correct. Additionally, if the mxd is not saved, the target will be set to the user temp workspace (vector workspace would then be untitled.gdb). The target gdb is created explicitely when using the Set Target Locations function. If it does not exist, the target vector will be created when using any tool from the toolbar that needs to write vector data. Note that some of the arc hydro geoprocessing tools may not create the target workspace (in particular the script tools). Christine Dartiguenave Esri Water Resources Team
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05-22-2013
01:39 PM
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For GeoHMS, Type = 5 for Reservoir and 6 for Diversion. Christine Dartiguenave Esri Water Resources Team
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05-22-2013
01:28 PM
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The objective of Catchments/AdjointCatchments/etc. is not to mimic the real world but to create a set of preprocessed data allowing fast watershed delineations. If you want to create a set of "catchments" (really subwatersheds) that mimic the real world, you can do this by creating the stream link grid and str grid based on your input stream instead of using a cell threshold. You could use the following steps (assuming a dendritic terrain where everything flows nicely downstream) to burn in your streams and create one catchment for each of your stream segments: 1. Create Drainage Line Structures -> based on you streams, this tool will generate the streamlink grid and drainage line as a rasterized version of your input streams. 2. DEM Reconditioning (burning in the streams - you can use drainageline which is already rasterized as input) 3. Fill Sinks (assuming a dendritic terrain) 4. Flow Direction 5. Adjust Flow Direction in Streams 6. Catchment Grid Delineation (based on stream link) 7. Catchment Polygon Processing Christine Dartiguenave Esri Water Resources Team
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05-22-2013
01:12 PM
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You could use the Arc Hydro Tools to calculate the distance to the downstream outlet(s) for each junction in your network. In a dendritic network this allows identifying the most downstream junction(s). You can check the Arc Hydro forum for instructions on downloading Arc Hydro. Then check the Attributes Tools > Calculate Length Downstream for Junctions tool in the Arc Hydro Tools toolbar/toolbox. Christine Dartiguenave Esri Water Resources Team
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05-14-2013
09:03 AM
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Note that the password has changed as of 4/11/2013 (will be reset every 6 months). The new password is: ADSRiver.2013 Christine Dartiguenave Esri Water Resources Team ****************** https://mft.esri.com Login: ADSRiverHydraulics Password: ADSRiver.2013 To access, select a FTP client: 1. Web Client Site link: https://mft.esri.com (Video tutorials available on the main page, prior to log in) 2. Third party SFTP client ** Download a preconfigured client https://mft.esri.com/EFTClient/Account/mft.zip ** 3. FTP address to configure a third party SFTP client of your choice: Site address: mft.esri.com Port: 22
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04-11-2013
09:37 AM
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Is your grid projected or in geographic? What is the xy unit? Christine Dartiguenave Esri Water Resources Team
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04-04-2013
09:36 AM
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I meant by UniqueID tables the 2 administrative tables that can be set up to configure the unique ids (APUNIQUEID and LAYERKEYTABLE tables), although most people use only the APUNIQUEID table. These tables are created automatically in your target workspace by the Arc Hydro tools. Christine
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04-03-2013
03:18 PM
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You need to use the Longest Flowpath function from the GeoHMS toolbar > Characteristics menu. This function will create the longest flow path features and populate the field LongestFL. You cannot use shapefiles as outputs. You need to make sure your output vector data are feature classes created in a geodatabase. Christine Dartiguenave Esri Water Resources Team
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03-29-2013
02:20 PM
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It looks like an issue with your regional settings (raster value comes back as 1730.800049 instead of 1730,800049 and is considered to be an invalid double). I think this issue has been fixed in 10 SP5. Which version of ArcGIS are you using? You can change the delimiter to "." instead of "," in your regional settings to verify this. It is always a good idea to use integer raster whenever possible. They take less storage space and they speed up the analyses. With a DEM, one way to keep your precision is to multiply the float raster by 10, 100, etc. to keep the desired level of precision and then set the ZUnit in the projection file associated to the raster (prj.adf) to indicate the zunit of the DEM. When the tool compute the river slope, it used the z-unit to generate the correct result. For example, if you initial float DEM is in meters, you can create an integer DEM in cm, and set its zunit to 100 (100 cm in 1m). Christine Dartiguenave Esri Water Resources Team
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03-29-2013
02:08 PM
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My kudoed posts
| Title | Kudos | Posted |
|---|---|---|
| 1 | 07-27-2021 03:27 PM | |
| 1 | 03-19-2020 04:17 PM | |
| 1 | 01-28-2013 06:59 AM | |
| 1 | 12-26-2018 02:07 PM | |
| 1 | 03-07-2018 04:29 PM |
Activity Feed
- Posted Re: stream/hydrojunction topology Stormwater Preprocessing Arc Hydro on Water Resources Questions. 01-15-2025 09:58 AM
- Posted Re: Error 010240: Fill Sinks (Terrain Processing Case 4) on Water Resources Questions. 11-25-2024 10:23 AM
- Got a Kudo for Arc Hydro Installation - Versions and Documentation. 11-12-2024 12:02 PM
- Posted Re: Arc Hydro (or other tools) for DEM-derived stream channels that respect MS4 infrastructure? on Water Resources Questions. 10-02-2024 02:34 PM
- Posted Re: Arc Hydro (or other tools) for DEM-derived stream channels that respect MS4 infrastructure? on Water Resources Questions. 10-01-2024 03:30 PM
- Posted Re: Arc Hydro (or other tools) for DEM-derived stream channels that respect MS4 infrastructure? on Water Resources Questions. 09-26-2024 09:00 AM
- Posted Re: Arc Hydro (or other tools) for DEM-derived stream channels that respect MS4 infrastructure? on Water Resources Questions. 09-25-2024 03:22 PM
- Got a Kudo for Re: Error when using Longest Flow Path tool from ArcHydro for ArcGIS Pro. 06-04-2024 10:40 AM
- Posted Re: Create Overland Flow Connectors does not generate output Feature Classes and Rasters on Water Resources Questions. 11-22-2023 11:43 AM
- Posted Re: Watershed Delineation on Water Resources Questions. 03-29-2023 10:26 AM
- Posted Re: ArcHydro Parallel processing issue on Water Resources Questions. 01-11-2023 10:06 AM
- Posted Re: Line Parameters from 2D Line Runtime Error on Water Resources Questions. 04-21-2022 10:35 AM
- Posted Re: Line Parameters from 2D Line Runtime Error on Water Resources Questions. 04-18-2022 12:48 PM
- Posted Re: Missing "Flood from Cross-Section" py file in ArcHydro for 10.8 on Water Resources Questions. 03-15-2022 01:21 PM
- Posted Re: Line Parameters from 2D Line Runtime Error on Water Resources Questions. 03-15-2022 10:34 AM
- Got a Kudo for Re: Flow Direction tool not calculating approperiate values from a burned DEM. 02-23-2022 08:08 PM
- Got a Kudo for Re: Calling Arc Hydro Tools in Python in ArcGIS Pro?. 12-12-2021 04:58 PM
- Posted Re: Create Stream From Subwatershed Point - General Function Failure on Water Resources Questions. 10-06-2021 12:33 PM
- Posted Re: Error when using Longest Flow Path tool from ArcHydro for ArcGIS Pro on Water Resources Questions. 07-27-2021 03:27 PM
- Posted Re: Crashes of Arcgis Pro due to usd of tool “create hydro network from catchment” on Water Resources Questions. 07-26-2021 08:45 AM
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