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I'm not entirely sure how you came to the conclusion that there is some size limitation imposed by ArcGIS, but there is not. Certain formats have size limitations. Tiff comes to mind, but even the old 4gb limit has been overcome with the advent of BigTiff format which ArcGIS is capable of writing. I've been working on some hydro things since the beginning of the year, specifically processing NHDPlus v1 data for the lower 48 states. I routinely process data with ArcHydro that is in excess of 8-10GB. Outside of my hydro work, I do a lot of testing on NED data, which is several hundred GB's of data. 1GB of data is really nothing much these days. My test machine specs: Windows Server 2008 R2 64 bit, ArcGIS 10.1 6GB RAM Intel Xeon W3550 @ 3.07GHz Best Regards, Eric I was told by HEC, that there is a ArcGIS limit when processing rasters.
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06-22-2012
04:45 PM
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Greetings Mark! I recently switched over (several months ago) from an Intel Core 2 Duo 2.4GHz processor with 4GB to a Intel i7 3.4GHz with 8GB. Prior to the switch, I was running ArcGIS V9.3 under Windows 7-64; I'm presently running ArcGIS 10. I don't think I necessarily needed to switch, but at the time, I was running into errors trying to process a large DEM and thought it might be due to the amount of memory. The errors were more likely due to size limitation of ArcGIS than my computer components. I've since found a workaround for the DEM where it's no longer a 1+ GB file (although my coworker recently informed me that it IS possible to process a DEM greater than 1GB). I would imagine your setup is quite adequate for what you're doing. For comparison purposes, the coworker that recently discovered it was possible to process a DEM greater than 1GB, is using a laptop that is more than several years old, which I would guess has a similar setup as your desktop.
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06-14-2012
10:30 AM
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I've ran the workspace on 2 computers...desktop and laptop...both using Win 7 64-bit and still the same error message. I was trying to follow the tutorial at: http://web.ics.purdue.edu/~vmerwade/education/geohms.pdf In that example, they have a zip file that has all the raster datasets and a geohms.mdb which contains the necessary vector data. I'm not sure how they got the vector data into the geohms.mdb...did they just copy the terrain preprocessing mdb file and rename it? or is their a method in setting that up? the User Manual is vague on how to setup the HEC-GeoHMS process. Perhaps someone can chime in on how they go about setting it up. Thanks!
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10-29-2010
03:30 PM
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Since HEC-GeoHMS and HEC-GeoRAS are products from the US Army Corp of Engineers, it's unlikely there'll be updates anytime soon.
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10-19-2010
03:57 PM
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Trying to generate a new HEC-GeoHMS project and coming up with the following error when I click Generate Project: System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component. at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.GetEnvironmentValue(String environmentName) at HECGeoHMS9.GenerateProject.UpdateAHD(String rasterLocation, String vectorLocation, String ahProjName) I was able to generate the project before with my draft files, but since finalizing our DEM, I can't seem to get past this error. Any ideas?
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10-18-2010
12:39 PM
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The best bet is to go here ftp://ftp.esri.com/ and look for the latest updates. ApFramework has been integrated into the install of ArcHydrotools9. Just need to make sure you uninstall the Water Utilities Application Framework and Arc Hydro Tools prior to installing the updated version.
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10-18-2010
12:32 PM
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You build walls if you don't want an area to have any flow leave the area, so it's dependent if that's your intent. I actually just started encountering this error, after running through the steps multiple times for the same criteria, with never a hiccup. Started getting errors for the wall or when I try to assign a stream slope. All started happening after I began incorporating Sink Pre-screening. Stream slope assignment worked prior to incorporating Sink Pre-Screening; now it doesn't work. Now my Build Walls step is not working, no matter how many times I start over fresh. Using Win 7 Pro 64-bit w/a Core 2 Duo 3GHz and 4GB ram. Any ideas on the errors?
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10-05-2010
01:26 PM
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