Latest Contributions by MarkBoucher

I'm assuming that you know about ArcHydro. http://www.esri.com/industries/water_resources/business/watershed_management.html ArcHydro uses the "HydroID" field to identify the watershed, and the "DrainID" in the rivers (DrainLine layer) identify the watersheds (HydroID) they drain. The DrainLine layer also has "arcid", "from_node" and "to_node" fields that I believe relate to the DrainagePoint layer fields in some way. This may be of help in creating the table you want. ... View more

Learn and use topology rules/tools. http://resources.arcgis.com/en/help/main/10.1/index.html#/An_overview_of_topology_in_ArcGIS/006200000001000000/ These are related to the align tools Alexey points out and they are available in 10.0. ... View more

Here's an image of my Model in Model Builder. Here I iterate through the larger polygons (cities) select the smaller polygons (parcels) in the big polygons and sort them. [ATTACH=CONFIG]17736[/ATTACH] ... View more

Maybe you can use Model Builder and iterate through the parcels, selecting the buildings for each iteration and somehow extract the largest building area in the building selection and save that in a field in the parcel layer. Later you could join the building layer with the parcel layer using that area and then mark a field in the parcel layer with the parcel number, unjoin them. This would mark the largest building in each parcel with the parcel number. Using Model Builder I set up a temp file with a similar situation (several polygons inside larger polygons). I was able to iterate through the large polygons and select by location the smaller ones and sort the smaller selected polygons by shape area descending (put largest on top), but I didn't have time to figure out the rest of the steps. Maybe an ArcPy script is needed. [ATTACH=CONFIG]17769[/ATTACH] ... View more

So what you want to do is select the largest building in each parcel, right? ... View more

Did you look at this thread? http://forums.arcgis.com/threads/41988-Resetting-Raster-calculation-limits?p=142809#poststop It seems like your processing extent needs to be reset. ... View more

Does saving closer to this disk root mean saving closer to the drive itself, for example, if saving to a C:\ drive saving as close as possible to the C:\? Look at the reply #3 (01-25-2012 04:18 PM) at this post:  http://forums.arcgis.com/threads/48100-ArcHydro-Problem-Solvers?p=164676#poststop ... View more

A while back, my contact at ESRI (instructor from Arc Hydro class) informed me that the versions on the ftp site are always in flux. That is, they use ftp://ftp.esri.com/ArcHydro/ to post interim updates to share within their group. These could change several times a day depending on their work flow. Therefore, I have always assumed that if I were to use the ftp versions, I'd be taking a chance that there could be some "beta testing" or version issues with AP Framework, Arc Hydro, etc.  I always download and install from the Corps site unless I was specifically instructed by ESRI to use a ftp site version. The Corps' GeoRAS page: http://www.hec.usace.army.mil/software/hec-ras/hec-georas.html ESRI wrote GeoRAS for the Corps of Engineers. When I install GeoHMS from the Corps' site, it installs Arc Hydro and AP Framework that version. I'm not sure if the GeoRAS version on the Corps site is the latest but, since they tend to take their time debugging the version before they post them, that version of GeoRAS will likely come with the right versions of supporting software. I would be confident that this would eliminate AP Framework issues and versioning issues and then I could focus my attention on other issues that might be causing problems. Maybe a Senior Member or ESRI staff person could confirm or correct this perception that I have. ... View more

You can look here for possible solutions.  http://forums.arcgis.com/threads/48100-ArcHydro-Problem-Solvers ... View more

You could also use "Select By Location" and choose the "Target layer(s) features are identical to the Source layer feature" option. Then if you "Switch the Selection" you would see which features have changed. Of course, this wouldn't give you any way to track what has changed or measure how much change there was unless you took it a few steps further. ... View more

...and i've in my whole map not always perfect hand drawn polygons (meadows, woods, fields...) touching each other or overlapping. is there an easy way to get rid of this problem? You could set up topology rules and use the topology editing tools to correct the hand drawn polygons so they don't overlap or have gaps. ... View more

I'm extremely interested in this too... ... View more

Paulo, Try this. After you run fill sinks and get the error. Refresh the catalog and see if the fil layer is there. It just might be! To refresh the catalog in v10, right click on the folder and choose refresh. You may need to do this twice. When I do it, I sometimes see three files with the layer name the first time, and the second time I see the layer with the proper file type icon. In my Arc Hydro experience, I've seen this happen at one time or another in most of the processing steps that result in rasters (fil, fdr, fac, str, strlnk, cat). Though I get an error message, the rasters are created anyway. I refresh the catalog to see if they are there (sometimes refresh twice). If they are, I right click on them, choose properties, and define their geographic projection (just in case it matters). Also, if you run the fill sinks function and get an error, some, but not all, of the files used for the fil layer might have been created. Trying to run fill sinks again without deleting these files might cause an error. I sometimes work through Windows Explorer to make sure there are not "left over" files from these tools. Hope you figure it all out. Mark ... View more

There are a number of possible causes. I've created a post that lists the ones that I've uncovered. I add to the post when I discover a new one. Other's have also posted to the thread. One added by Neil O'brien on turning off background processing may be an easy one to try first. I can't promise you that any of them will fix your problem, but one might. Good luck! http://forums.arcgis.com/threads/48100-ArcHydro-Problem-Solvers ... View more