Latest Contributions by GarretDuffy

Hi Joshua, Thanks for this clear explanation.  I guess my simple query worked on a simple dataset purely by chance because the ELEVATIONS were floats so were unique figures just by chance. For this dataset, the elevations are integers so were less likely to be unique. I was just wondering how exactly to implement your SQL into a definition query in Arcmap? I tried this: [OBJECTID] IN ( SELECT [OBJECTID] FROM NW_US_mountains_intersect t1, (SELECT [FID_T25km_grid_washington_IDAHO_MONTANA], MAX([ELEVATION]) as maxe FROM NW_US_mountains_intersect GROUP BY [FID_T25km_grid_washington_IDAHO_MONTANA] t2 WHERE t1.[FID_T25km_grid_washington_IDAHO_MONTANA] = t2.FID_T25km_grid_washington_IDAHO_MONTANA] AND t1.[ELEVATION] = t2.maxe) Thanks! Garret ... View more

Hi Joshua, Thanks for the response and for the info on how to upload . I ended up working around the problem in elegantly using Excel but obviously that is unsatisfactory moving forward. I've attached a sample of the data in the personal geodatabase. If you run the following query in the "Select by Attributes" function within the attributes window in ArcMap: [ELEVATION] IN (SELECT MAX( [ELEVATION] ) FROM Sample_Dataset GROUP BY [FID_T_25_projected] ) You will see that two points are selected with in one grid square (FID 663 see attached screenshot).  There should only be one selected (the maximum value).  If I uploaded the entire dataset you would see that in some cases as many as 7 points are seemingly randomly selected instead of the single maximum value. Any tips appreciated! Garret ... View more

DITTO ... View more

Hi, I had exactly the same problem with Landsat 5 (R1G product) metadata not being read. It was partially fixed by applying this Patch: ArcGIS-102-DT-LS8-Patch.msp Now, I can see the metadata is being read properly. However, now when I insert the function Apparent Reflectance, I only see two tabs (General and Apparent Reflectance, no "Key Metadata" tab).  Also: 1) only the RADIANCE_MULT variable (from the metadata file) is used as the "Gain Value", the RADIANCE_ADD variable is just ignored?  2) The "bias value" is mapped to the RADIANCE_MINIMUM variable (from the metadata file) Regardless, when I click OK after inserting the function, I get the message: "The function could not be inserted. The input or output arguments are invalid" Any advice would be appreciated. Garret ... View more

When I try to upload, I get this: Request Entity Too Large The requested resource /newattachment.php does not allow request data with POST requests, or the amount of data provided in the request exceeds the capacity limit. Even though the LPK file is only 2.2 MB, 10 MB is the limit ... View more

Hi Drew, Your response helped a lot.  Since you couldn't reproduce the error, the problem was with the input data.  So there's no bug (!) First I tried Repair Geometry; no change. Then I exported the Feature Class to a shapefile, tried Multiple Ring Buffer again on the shapefile and hey presto! the input feature attributes were appended to the buffer attribute table. Not sure how I can send you the Feature Class as it's embedded within a geodatabase. Thanks, Garret ... View more

Hi, This appears to be a bug in BUFFER ARCGIS version 10.  According to http://resources.esri.com/help/9.3/arcgisengine/java/GP_ToolRef/analysis_tools/how_buffer_analysis_works.htm "The NONE option causes each input feature to be buffered independently. For each input feature, one feature is written to the output feature class. The output feature has all the input feature's attributes with the addition of a field named BUFF_DIST containing the buffer distance used on that particular feature. " This is clearly not happening with my installation of ARC. Garret Hi,  1) I have a bunch of source polygons for which I  have created undissolved buffer polygons. 2) I then want to do some calculations, e.g. length of line insecting the polygons, and add that information to the buffer attribute table 3) I then want to join those calculations to the source polygon However, the feature ID of the source polygon is not appended to the attribute table of the buffer so this makes step 3 very difficult.  I thought a spatial join would be a workaround but I couldn't get it to work. Does anyone have any idea how might achieve step 3 above? Thanks, Garret BTW: there is a column called ORIG_FID in the buffer attribute table where I expected the FID of the source feature, but it is equal to one in all rows ... View more

Hi Donovan, You helped a lot, thanks... your last point was the key.  All I did was re-export the original shapefile feature class (which was not made with Arc 10) to another shapefile in Arc Catalog... so, in essence, just made a duplicate, ran Dissolve and it worked!  The issue was probably the shapefile format was old. Thanks a mill... Garret ... View more

Hi Donovan, Thanks.  From your reply, I guessed I was on the right track so I extracted a single set of river lines into a separate feature class and dissolve worked worked fine. So I'm guessing it must be the size of the original rivers feature class?  (it's only 4630 rows and 12 columns though).  Should I split it or something? Thanks for any suggestions, Garret ... View more