![union arcmap union arcmap](https://desktop.arcgis.com/en/arcmap/10.3/tools/coverage-toolbox/GUID-F339D5CC-1AAB-4F84-9DC4-2F53648601D4-web.gif)
For many years, certain raster operations wanted to use folder workspaces rather than geodatabases, though this has also improved. Finally, check the workspace environment settings. The same rules can apply for outputs – try writing out the results as a different format to see if it resolves the issue. You can try copying the data to a new version of the same workspace – so if it’s already in a file geodatabase, try copying it to a brand new file geodatabase as the only item – or you can try converting it to a different format (export a GeoTIFF, GRID, etc). While ArcGIS has become much more consistent in the last 5-10 years, occasionally a tool may have trouble working with file geodatabase rasters when an Esri GRID format raster works just fine (for example). To put this another way, check the formats of the data you’re providing as inputs or choosing for outputs, as well as the locations they are stored. Map documents can occasionally accumulate problems or small issues related to environment settings you’ve changed, and attempting the operation in a new map document can help rule out these issues. If you’ve been working with the data in ArcMap, try running it in ArcCatalog instead, or try running it in a new, blank map document.
![union arcmap union arcmap](https://desktop.arcgis.com/es/arcmap/latest/analyze/arcpy-classes/GUID-61042046-BCD1-44BE-A66F-86D60FD444F4-web.gif)
Try the operation in a blank map document or in ArcCatalog The easiest way is to often reboot your whole computer.
#UNION ARCMAP SOFTWARE#
Turning it off and back on again can work! If you want to just reboot the software and not your computer, make sure to kill all ArcGIS programs – you can open your task manager and find ArcROT, ArcGIS Connection Manager, and ArcGIS Cache Manager – make sure to kill each of those processes if they are running. Troubleshooting 101, but we all need a reminder sometimes.
![union arcmap union arcmap](https://i.stack.imgur.com/bgByp.png)
Check the names of your inputs and outputs.Try the operation in a blank map document or in ArcCatalog.Here’s the summary of steps (followed by detailed explanations for each one), in an approximate order of how I try them – though circumstances will vary and you may have a hunch that one of these will work. In this article, I’ll lay out some places to look for the most common solutions to this problem. It is usually accompanied by misleading messages such as “ the table was not found” or something else.
![union arcmap union arcmap](https://i.ytimg.com/vi/RS5jKUQD-oE/maxresdefault.jpg)
#UNION ARCMAP CODE#
But one error message, with error code 999999, is painful to get because it means something went wrong, and even the software isn’t sure what it is. This means it is very easy to identify which polygons are not covered by A2 by null attributes that have been acquired from A2.If you’ve worked with ArcGIS, you’ve certainly had your fair share of errors while running geoprocessing tools – many of them are quite descriptive and tell you exactly what’s wrong, while some are specific but cryptic. OR select by attributes as Union will append attributes from A1 and A2 to A3.
#UNION ARCMAP LICENSE#
If you have access to the advance license with ArcGIS you coudl use the 'Erase tool', you can read more hereĬreates a feature class by overlaying the Input Features with the polygons of the Erase Features.