tag:blogger.com,1999:blog-1675184707067447729.post5324832891890702619..comments2023-07-12T07:12:04.697-07:00Comments on The RAS Solution: Post-Processing: Creating Inundation Maps with very Large TerrainChris G.http://www.blogger.com/profile/00354834185663924786noreply@blogger.comBlogger22125tag:blogger.com,1999:blog-1675184707067447729.post-37581069815467805292020-02-22T01:58:58.568-08:002020-02-22T01:58:58.568-08:00Pls am Having d same problem when using hecgeoras ...Pls am Having d same problem when using hecgeoras whenever m running the flood delineation from raster it's displaying object reference not set to an instance of objectAnonymoushttps://www.blogger.com/profile/09210056404657836576noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-67320642028886173592018-07-11T09:36:05.023-07:002018-07-11T09:36:05.023-07:00In version 4.1 RAS Mapper, you could edit the &quo...In version 4.1 RAS Mapper, you could edit the "Transition lines" (lines connecting the ends of the cross section that created a polygon of sorts to create the flood map surface). In 5.0.3, this line is called the "river edge line". Is there a way to edit this?Kathrynhttps://www.blogger.com/profile/04363750307289971489noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-65015193214736529412017-07-28T09:30:16.138-07:002017-07-28T09:30:16.138-07:00Hello,
We are running into a different Post-Proce...Hello,<br /><br />We are running into a different Post-Processing error and are curious if anyone might have some guidance. We are trying to store/save to disk a velocity output map layer as a point feature. We would like to be able to use the point feature layer shapefile in ArcMap for our purposes. <br /><br />We have tried to execute this and when the compute/update stored map command is selected, the following error is obtained: "Object reference not set to an instance of an object". In the select point layer option under results map parameters, there appears to be a dropdown menu for selecting a "point layer" but it is inactive. This could be the problem but we cannot seem to figure out how to link to another file. We have exported the 2D flow area to a shapefile within the project folder but this does not seem to work.<br /><br />Please help! Thanks in advance. Your time is much appreciated.<br /><br />Kind Regards, -Tom G<br />Anonymoushttps://www.blogger.com/profile/15363018176960344965noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-84863535012790410062016-10-11T08:04:47.480-07:002016-10-11T08:04:47.480-07:00Hi Jose- Tell your coworker thanks for me for gif...Hi Jose- Tell your coworker thanks for me for gifting you the book. Hope you like it. If I understand your question correctly, you are trying to use a water surface grid generated from another program (not HEC-RAS) and then view it in RAS Mapper using a different Terrain (from the LiDAR raster)? If so, you'll either have to do this all external to HEC-RAS in a GIS application, or you'll have to recreated the water surface grid in HEC-RAS. If you do the latter, you can always use a different Terrain for your results than you do for your computations (see Associate Terrain Layer...). Let me know if I misunderstood your question.<br /><br />Regards-<br />chrisChris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-47652783635291408072016-10-07T14:58:03.179-07:002016-10-07T14:58:03.179-07:00Dear Chris,
Is there any chance that via email (o...Dear Chris,<br /><br />Is there any chance that via email (or here) you could post what is the not-so-general idea (or redirect me to a paper, study or white paper) of the algorithm that HEC-RAS uses to "intersects" a water depth to the DEM?<br /><br />The thing is that I have a water depth generated with another 2D package (in points) and have a "flood map" (Raster, shp,or even points...)generated from them, but I want to correct it using a high resolution LiDAR raster (the water depth was made using a decent DEM though, but not as good as the new one), and trying to implement a script in Python that does that specific task.<br /><br />PS: A coworker gifted me your Book and told me about this Blog to complement it!<br /><br />Thank you so much for your time!<br /><br />José D.Anonymoushttps://www.blogger.com/profile/06834566600296230299noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-44238370043861269112016-06-17T14:18:49.427-07:002016-06-17T14:18:49.427-07:00I think this was fixed in the most recent release ...I think this was fixed in the most recent release of HEC-RAS 5.0; but in the past I've used the "Repair Geometry" tool in ArcMap to repair broken inundation shapefiles from RASMapper.Mikell Warmshttps://www.blogger.com/profile/00817843514499598964noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-26592624435637480292016-05-18T02:14:58.561-07:002016-05-18T02:14:58.561-07:00Hey everyone. Did anyone had problems to work with...Hey everyone. Did anyone had problems to work with the shapefile of the inundation map layer in an alternitive GIS after export (I use QGIS). My attribut table is empty and the polygon Layer has just one object. After working for a while with the polygon layer (deleting some points..) i can't see the layer anymore. Just if i zoom out and the hole polygon is visible. Anyone an idea?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-5392209972703492432016-02-29T15:12:12.954-08:002016-02-29T15:12:12.954-08:00I am modeling a ravine with all the area as 2d are...I am modeling a ravine with all the area as 2d area. on the site where is the bridge made a connection (SA / 2D Area Conn). A dam with a culvert, the model runs me well without mistakes have a mesh and a computational time that make me a stable model, but the problem arises me when I go to see the results in the ras mapper can not get to know if I considering the bridge as the flow passes unhindered and where the bridge should be no obstructions and increased speed effects of batteries, but not if you have to activate an option after modeling the bridge to take it into account ... please help . Annex images<br /><br />https://www.dropbox.com/sh/ou1wkobqm7j28ah/AADDBDWQNDQnVjTYbTJ6L-lMa?dl=0luis prietonoreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-14906679312944855602016-02-24T09:17:53.008-08:002016-02-24T09:17:53.008-08:00This comment has been removed by the author.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-76589769322018504992016-02-24T08:34:13.382-08:002016-02-24T08:34:13.382-08:00This comment has been removed by a blog administrator.UNKNhttps://www.blogger.com/profile/03502909214391977571noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-71409385334872215452016-02-24T08:18:38.696-08:002016-02-24T08:18:38.696-08:00It could be your cross sections are different from...It could be your cross sections are different from your terrain. Or you have terrain in between cross sections that is much different (i.e. deeper). Your Google Drive link is no longer working.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-1619229679983587972016-02-24T01:18:35.076-08:002016-02-24T01:18:35.076-08:00ok i'll, i have one more confusion could you p...ok i'll, i have one more confusion could you please clear it to me.<br />in hec ras i am getting values of hydraulic depth between 0 and 14, but when i am performing analysis in hec georas for inundation i am getting maximum values upto 50. i am working with metric units. so these values are very high. could anyone guide why is it so?<br />https://drive.google.com/drive/u/1/folders/0B7yr7ZTKOuD8OHB1ZE5jOFZzSkUUNKNhttps://www.blogger.com/profile/03502909214391977571noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-19167727002114844692016-02-23T10:28:26.227-08:002016-02-23T10:28:26.227-08:00Please post a screenshot of the bridge/culvert edi...Please post a screenshot of the bridge/culvert editor for the bridge that is giving that error. Put it on dropbox or google drive and post the link.Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-50570260565328603292016-02-23T10:25:48.416-08:002016-02-23T10:25:48.416-08:00already done all this work, still got the error.already done all this work, still got the error.UNKNhttps://www.blogger.com/profile/03502909214391977571noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-21718402035987878402016-02-23T09:02:05.777-08:002016-02-23T09:02:05.777-08:00Go to the bridge/culvert editor. Open the Deck/Ro...Go to the bridge/culvert editor. Open the Deck/Roadway editor. Here you will see a table that includes columns for upstream station, high chord, and low chord; as well as downstream station, high chord, and low chord. The message you are getting implies that you have not defined a bridge opening on the upstream side of the bridge. You can define the opening on the upstream side using the low chord column. Once you have done this, look at the plot in the Bridge/Culvert Editor and make sure you see an opening under your bridge deck for both the upstream and downstream sides. This is basic stuff, so first, please read the HEC-RAS manual on how to enter a bridge-this will explain a lot.<br /> Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-15532292350421299872016-02-23T06:54:07.474-08:002016-02-23T06:54:07.474-08:00Did not get that Chris Goodell, could u please ela...Did not get that Chris Goodell, could u please elaborate more?UNKNhttps://www.blogger.com/profile/03502909214391977571noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-15840377450687822832016-02-22T08:47:23.720-08:002016-02-22T08:47:23.720-08:00Make sure you have the opening defined by the low ...Make sure you have the opening defined by the low chord on the upstream side as well as the downstream. Chris G.https://www.blogger.com/profile/03272464763887890080noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-76989929993324665952016-02-19T08:13:00.999-08:002016-02-19T08:13:00.999-08:00I completed the work in hec georas and exported da...I completed the work in hec georas and exported data to hec ras, after editing geometric data and steady flow data when i run the analysis, i am getting this error. "Bridge does not contain an opening on Upstream side", Anybody here know the answer kindly do answer as soon as possible. I will be very Thankful. UNKNhttps://www.blogger.com/profile/03502909214391977571noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-3383916043575878812016-02-10T18:20:17.333-08:002016-02-10T18:20:17.333-08:00One way around this issue is when doing the clip, ...One way around this issue is when doing the clip, have the polygons overlap. This is the same idea that you had to use when using multiple terrains in HEC Geo-RAS. Anonymoushttps://www.blogger.com/profile/03171088146398561304noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-35108439439384631842016-02-10T18:19:45.813-08:002016-02-10T18:19:45.813-08:00One way around this issue is when doing the clip, ...One way around this issue is when doing the clip, have the polygons overlap. This is the same idea that you had to use when using multiple terrains in HEC Geo-RAS. Anonymoushttps://www.blogger.com/profile/03171088146398561304noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-4009782856390923432016-02-10T11:48:32.301-08:002016-02-10T11:48:32.301-08:00This is a good point that also brings up another p...This is a good point that also brings up another possible issue that users may encounter between the individual inundation shapefile pieces. <br /><br />You may have to manually post-process the seams between the pieces slightly if they do not match up completely once they are merged. You may see a small "line" at the seams where 2 polygons do not overlap perfectly. Mikell Warmshttps://www.blogger.com/profile/00817843514499598964noreply@blogger.comtag:blogger.com,1999:blog-1675184707067447729.post-1756322472011374182016-02-10T11:16:43.217-08:002016-02-10T11:16:43.217-08:00When clipping the raster, don't forget to use ...When clipping the raster, don't forget to use the Snap Raster function. While in the Clip dialog, click on "Environments..." at the bottom of the dialog window. Expand the Processing Extent, then select your original raster as the Snap Raster. This forces the output pixels of your clipped raster to align to your original raster. Otherwise, ArcGIS will re-sample the raster when you clip. JAPhttps://www.blogger.com/profile/15446208153922060087noreply@blogger.com