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I think the step you are missing is to run the model. 😄 The model lists ani_mor_1 because that is the first feature class the iterator can see. It does not list each feature class it is going to iterate through. Think of what the model builder window would look like if you were iterating through thousands of feature classes...What a mess. Eric
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06-14-2012
02:19 PM
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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. 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
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06-14-2012
01:39 PM
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You need to use an iterator in the model. You should use Iterate Feature Classes. Here are examples of using Iterators. Best Regards, Eric
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06-14-2012
01:00 PM
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Marie, To "Use elevation values in the layer's features", the feature class must be Z enabled - Z's stored in the Shape field. If all you have is an attribute for height ( you have a 2d feature class) then you must select the option "Use a constant value or expression", then open the Expression Builder dialog and select the appropriate field containing your height values. Regards, Eric
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06-14-2012
09:14 AM
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Tomas, There a number of forums that discuss this, but I can outline it for you. First, I will assume your forest polygons have an attribute field for height. Given this, when you convert the polygons to raster you need to specify the height field to use as the value field during the conversion. You need to set the extent of output to be equal to your DEM, and at the same resolution. This will result in a raster that covers the entire DEM area, and is made up of data (where you had polygons) and nodata pixels (no polygon data). Next you want to add the tree height raster to the DEM, and where you have no tree height data you want to return the original DEM value. You do this will map algebra. This syntax is old (pre 10) because I copied it from another forum where I posted in but the concept is here for you. [newsurface] = CON(ISNULL([treeheight]),[dem],[dem] + [treeheight]) Once you have the surface that incorporates the tree's you will have to rerun Viewshed. Regards, Eric
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06-13-2012
08:46 AM
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It's not required of you to convert the polygons to raster in advance, although it will make the zonal tool faster since it won't have to do it. When you let the software convert the polygon zones to raster, it will convert it using the same cell size as the input value raster. If the zones (this whole part is in the doc) are relatively small (especially when smaller than a single pixel in the value raster) we do suggest you determine a more appropriate cell size to use, so as to not lose a zone in the conversion process. So, if your temperature raster is very coarse resolution relative to the size of a single zone, you should convert the zone data to raster at a cell size finer than the temperature raster. The cell size needs to be determined by you. That is, you need to determine a small enough cell size to represent the polygon while in raster form. Technically, once you determine the appropriate cell size to represent the features, you don't have to convert the polygons into rasters at that resolution (unless you want the tool to run faster). You can just use this resolution as the cell size in the Raster Analysis Settings of the Environment Settings. Please review Zonal Statistics As Table for many more details. Eric
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06-12-2012
02:00 PM
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Mark, You could try Copy Raster instead of Data > Export to see if that is a viable workaround. I can't reproduce the issue you are experiencing, but it certainly looks like a bug. Eric
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06-11-2012
10:21 AM
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Elaine, The in_value_raster parameter would be the temperature rasters that you are trying to get the average monthly temperature of per polygon. This would require you to have 12 temperature rasters; one for each month. Each time you execute the tool it would return the average (mean) temperature per "Input feature zone data". Regards, Eric
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06-11-2012
07:38 AM
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Jamal, Please send a screenshot of 'B' layer properties so I can see the extent values. Please do the same for Elevation. What happens if you add Elevation to a blank map, then add B to it? Does B overlay Elevation? If layer B has the same extent values as layer A that you uploaded to this forum, that would explain the issue. You can't add two rasters together if they don't line up with one another. Eric
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06-07-2012
02:02 PM
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You select the raster you want to Clip/Mask in the Image Analysis window (IAW), from the list of rasters. You also select a polygon (feature class polygon), and then just hit the Clip or Mask button in the IAW. The layer is temporary by default.
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06-06-2012
03:18 PM
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No problem Mark. I just didn't want you to keep having to start blank maps. Is there a reason why you're going through this 'convert to graphics' workflow rather than just hitting the Mask button on the Image Analysis Window? I mentioned this method well before Jeff S. replied to you -technically it was even before you posted the question. Maybe you didn't read the whole thread. You can also Clip with the Image Analysis window - all you need to do for both is select a polygon from your feature class. No conversion to graphics required.
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06-06-2012
03:09 PM
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Mark, To get rid of the graphics you created, just select them and hit the Delete key. Eric
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06-06-2012
03:01 PM
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Jamal, One more thing. I looked up the nested error, "Error 010422" and found it is related to the Mask setting in the environment settings. So even if B does line up with Elevation, if you have a mask set in the environments for some other location that doesn't overlap either B or Elevation, the tool would fail with this error. http://resourcesbeta.arcgis.com/en/help/main/10.1/index.html#//00vq0000000s010422 Eric
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06-06-2012
02:36 PM
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Writing to the default geodatabase should be fine, but you could try GRID if you want. The rasters do not have to have the same projection either, although recommended. What is more revealing to me is the geodatabase you provided. There is only the A raster which isn't one your trying to add, but nonetheless I noticed that it doesn't have a spatial referenced defined. Also, I went back to your screenshots and noticed that even though Elevation is the 3rd layer in the map, it is always the raster being shown behind the other dialogs that are open. This begs the question...Does B even line up with Elevation? Or is too much of the display being hid by the other dialogs in your screenshots to see that B is a subset of Elevation? Eric
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06-06-2012
02:15 PM
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First, you have to tell me what you mean by "not working". Is there an error? Is the output wrong? Have you tried running the Plus tool instead? Eric
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06-06-2012
01:32 PM
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