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The Weighted Overlay tool contains more Input sections than the weights, themselves. My Question is about the 'Scale Value' and 'Evaluation Scale' inputs and how I relate and use them with my reclassified data. ...That's ok, I'll figure it out -- thanks anyway
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12-06-2014
02:51 PM
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Yes, sorry, I'm in the Weighted Overlay tool. It's not clear to me how I relate my already Reclassified Input Rasters (on a scale of 1 to 10) to the Weighted Overlay tool's 'Scale Value' and 'Evaluation Scale'..? Thanks.
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12-04-2014
07:34 AM
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In the Overlay Analysis tool, do you need to set a Scale Value to a Field Value to Rasters already Reclassified? And what about the Evaluation Scale; If I've already Reclassified the Rasters to a Common Scale, why do I need to set this? Thanks!
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12-03-2014
06:49 PM
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Thanks. Well, I tried the Join using ArcToolbox. This approach adds the join permanently to the Input-Target Layer. I thought that might help me avoid having to Export the join as a new Layer. ...But yes, I want the join to be permanent so that I can perform field functions that you cannot when it's only in temporary condition. Interestingly, this ArcToolbox approach gave me an Error indicating my Join Table did not have an OID Field. I knew that since this was an Excel Table, but didn't think I needed one to do a Join. But anyway, I followed the suggestion of using the Data Management > Copy Rows tool to create an OID for that Table. That worked. Then, I tried the Join (from ArcToolbox) again, and this time it worked -- I have a permanently join Layer!
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11-25-2014
08:45 AM
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I have successfully completed an attribute Join. And when I Export (in order to have a new Layer with these joined fields) it does so. However, wen I add this new Feature Class to the map there are NO records, no map. ...What might be causing this behvior? Thanks!
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11-25-2014
07:48 AM
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You're probably right, but I guess I'll just need to try it and do the calculations myself to confirm or deny. On a related note, I just read the Bilinear interpolation description for 'Project Raster' and it states that the calculation is based on the "surrounding cells" -- even more ambiguous! ;0 haha
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04-24-2014
05:47 PM
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Thanks for your reply. Yeah, the reason I ask is because Bilinear Interpolation for Resampling clearly states that the calculation will be based on a "weighted-distance of the 4 nearest Input Cell Centers". But for Bilinear Interpolation "option" for Extraction [Cell Value to Input Points] I only see brief mention of this in the Help Doc and Tool Help that states the calculation will be based on the "adjacent Cells w/ valid Values". ...No mention of being "distance-weighted" and no mention of "4 closest Inputs". ...And so if Extraction really uses "adjacent cells", then what constitutes adjacency? a) the 4 Cells sharing a Cell side b) those 4, plus the Cell the Input Point is within, making it 5 Cells c) the 8 Cells totally surrounding the Cell d) those 8, plus the Cell the Input Point is within, making it 9 Cells
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04-24-2014
03:57 PM
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...I guess I should do a better job of just getting straight to the question (although at least we have some context now): Is the Bilinear 'Resampling' interpolation technique use the exact same methodology as the Bilinear 'Extraction (Cell Value to Input Points)' interpolation technique..? Thanks!
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04-23-2014
06:41 AM
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Thanks -- yes, I read and understood the Help Doc on the Bilinear Resampling interpolation technique. ...So I assume you are indicating that this behavior is the same exact same thing as the Bilinear Extraction (Cell Value to Input Points) interpolation technique..? That was the underlying confusion I had because the Help Doc for the Extraction Tool did not get into those specifics.
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04-21-2014
09:20 AM
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I am attempting to use the Spatial Analyst Tool in the Extraction Toolset called 'Extract Values to Points'. One option is to assign the Cell Values to the Input Points using "Bilinear Interpolation". I have read about this in the Resampling Help Doc, though this seems like it would be the reverse situation. Either way, it is not clear to me which Cells will be used and how. The Tool itself Help Doc is not clear to me either. Is it going to use only the 4 "nearest" Cell center Values? If so, I assume that includes the one it falls within..? Or is it going to use the 4 "adjacent" Cell center Values? If so, I assume those are the Cells that share a side with the Cell containing the Point..? if so, I assume that this is really going to be using 5 Cell Values to include the one it falls within..? Or, is this Tool not restricted to 4 or 5 Cell Values, and will use all the "neighboring"cells which will amount to 8 or 9 Cell Values? ...In other words, the diagonal Cells will also be included since they share a vertex with the Cell containing the Point. In either case, are these Cell Values "distance-weighted"? If so, is this technique explained how it weights..? Thanks!
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04-17-2014
05:42 PM
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...Well, maybe I spoke too quick. I thought I understood what I read in the Help Doc, ...but Whenever I try to only set the Current Workspace and erase anything in the Scratch Workspace, ArcGIS still defaults the Scratch Workspace back to the \Default.gdb\ Workspace and that's where it is saving my outputs. ...Seems to me the Current Workspace is completely ignored.
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04-07-2014
04:50 PM
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Thanks, Dale. I guess I had overlooked this. It appears the Scratch Workspace trumps the Current Workspace if it is set.
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04-07-2014
12:05 PM
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Title | Kudos | Posted |
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12 | 11-02-2011 09:42 AM |
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