Latest Contributions by ShikoNjuno

Just to mention.....the model works just fine within Model Builder, but gives the above mentioned error message outside of Builder. Any suggestions folks??? Thanks ... View more

ERROR 000622: Failed to execute (ZonalStatisticsAsTable). Parameters are not valid. ERROR 000859: The required parameter Zone field is empty, or is not the type of Field. Failed to execute (Zonal Statistics as Table (2)). Failed at Thu Aug 01 11:22:15 2013 (Elapsed Time: 0.00 seconds) Failed to execute (Model2). Failed at Thu Aug 01 11:22:15 2013 (Elapsed Time: 2.00 seconds) I changed the Select by Location environment to include the Workspace (i.e. I checked the workspace option) and the error msg is as shown above. Help!!! ... View more

When I try the Add Join tool, for some reason it deactivates the other Zonal Statistics as Table tools that are attached to the Shapefile. The table to which the "Field_Acre" attribute field is to be joined will not join as the input and so therefore, the Selection Feature set shapefile must be the input. In doing so however, the other zonal tools lose the info. required to run. ... View more

Well I'm getting closer to the right output, but in going back and checking ALL the values, I still have one last issue. Some of the values that I'm getting after running the Zonal Stats tool are slightly off. I'm not getting the raster value that I expect for that shapefile polygon, instead, I'm getting the raster value of the neighboring polygon!!! This isn't happening for all polygons though, just some of them....so it's not very consistent which makes it harder to narrow in on the issue. I'm not too familiar with either one of these but I'm guessing it has something to do with pyramids or resampling methods. Can anyone help me figure out what might be going on? Below are my current Zonal Statistics as Table Environment Settings: [ATTACH=CONFIG]26225[/ATTACH] Any thoughts?!! ... View more

Interesting things is why you are using MEAN value for landuse code(?)? Want to see the changes after year by year? No...the MEAN is supposed to take the average of all the raster pixels within the corresponding polygon. Here's a snapshot of what I'm working on (Note: has been revised): [ATTACH=CONFIG]26185[/ATTACH] At this point I'm pretty sure my problem lies in the environment settings but I can't for the life of me figure out what to change. Input: Shapefiles with polygons and GRID raster files that hold the correct output info. Tool: Zonal Stats as Table Output: Table showing the MEAN results for all polygons in the shapefile. Problem: The results do not match the raster info.....close, but not quite. Solution: STILL RACKING MY BRAIN :mad: Resort: HELP!!! ... View more

Using ArcMap 10.1 in XPsp3. I can't rectify a georeferenced image. The procedure returns the erorr: "Failed to save raster dataset". Occurs when trying to generate a .tif or any of the compressed formats. Whenever this has happens to me it's either because the name is invalid, i.e. either it has more than 13 characters or the extension name is spelled wrong like .tiff instead of .tif. Another reason was that my Map file had too many files saved to it and there was too much going on internally within that map (even if layers are turned off)! Try creating a whole new map with just what you need and see what happens. Also,depending on your application, the raster cell size may be too small. I'm not sure what you have it set at right now but try going larger and see if that works. ... View more

The cell size 60  * 60--it is 3600 sq. I don't know your purpose, but it is so big. You may set it as 1*1, then the return may fit your expectation. The Cell Assignment method doesn't affect your  result but cell size. If the cell size is too small, the tool doesn't work sometimes. You need to try. You know you were right about the smaller cell size in this case. I tried 30 *30 and my output was closer to what it should be. I'm working on a 10 * 10 raster at the moment. It's taking quite a while to create the layer but it's definitely worth a shot.....and the wait 🙂 ... View more

Usually sampling to a smaller cell size is inappropriate because you will make assumptions from data that is not meant to be used at these scales.  I would not resample the raster unless you want your results to be tainted. How large are the polygons?  Realize that the app will first convert your polys to rasters.  So as I first said, please set up your environment setting inside the zonal stats tool.  The enivronmental settings button is at the bottom of the tool. Set your snap raster to the raster.  The extent to your polys and the cell size to the raster, and see what happens. Realize that the center of a raster cell has to fall inside the poly before it will be included in the stats. Hope that helps. Thanks for you input Alicia,my polygons are all different sizes but the thing about that file is this.... It was originally a raster TIF which I converted to a shapefile of polygons. This created really rough edges around the polygon and it still doesn't look quite right. The reason I had to do this is because I needed to create another raster TIF of one of the attribute fields.Then, as per Tom's earlier suggestion, I converted it to a raster GRID as spatial analyst tools are said to work better with GRID types(which I did find to be true). So far the values for this particular element (landuse) is the most inaccurate of any of my other data. I wonder if it has something to do with all the conversions I've had to make?!? Anyway I changed the settings as you suggested and below is a snapshot of what my current settings are. Please take a look and let me know if I should make any changes: [ATTACH=CONFIG]26176[/ATTACH] And if you can think of anything else I might try let me know too. Cheers. ... View more

Thanks for the clarification Tom. I actually just realized that all that information is in the Properties menu of each file :rolleyes: And I have confirmed that they all have matching Spatial Reference. As for the Cell Size....I'm already pretty tight at 60 by 60, but I'll go ahead and try going lower. Also, do you know if the Cell Assignment is better as CENTER or MAX?? ... View more

Export it as GRID (from drop down window to select). Hey thanks Tom, This seems to have made quite a difference. Better!! However, the values are still not quite right. Do you know for raster analysis if using the Double or Float Type is more advantageous than the other?? Maybe it is a Spatial Referencing issue as Shitij mentioned?!! ... View more

Did you check if the spatial references for raster and shapefile match? How do I check that. I know I checked to make sure the Projection is the same for both, but how exactly do I check spatial reference? ... View more