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Viewing attribute table for Grid raster

CaraAppel

I have a raster in ESRI Grid format and am trying to view the attribute table in my student version of ArcMap 10.5. I know this raster has fields attached to it because I am able to view the attribute table on another machine running ArcMap 10.5.1 (see attached screenshot). However, on my machine, when I right click the raster in Table of Contents, the option to Open Attribute Table is grayed out. I have Spatial Analyst enabled on my machine, but is there some other setting I should look into, or a restriction with my student license? My ultimate goal is to use the Lookup Tool to produce rasters based on the attribute fields, which I was able to do successfully on the other machine. I have the exact same files for the raster on my machine.

screenshot of attribute table displayed for ESRI Grid raster

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CaraAppel

It is an internal drive on my computer, and I store a lot of my GIS data

there, but I will be reconsidering that if I have any more problems! Thanks

again for the help.

DanPatterson_Retired

is D a 'real drive' (ie internal to your computer) or a usb/flash drive? my students have no end of problems using usb drives for some reason... so much so, we banish them except for backups at the end of the day

CaraAppel

Thanks for the reply. I think you have inadvertently solved my problem! I went to double-check on the file location, which was on my 😧 drive. Out of curiosity, I moved it to my C: drive. Now I can view the attributes! Any idea why it would not work from the 😧 drive?

Cara

SteveLynch

Cara

Say the ESRI grid is called mygrid and it is located in c:\temp

Using Windows Explorer navigate to c:\temp\mygrid

Do you see a file called vat.adf?

and I presume that this grid is stored locally on your computer?

Thanks

-Steve

CaraAppel

There are about 30000 rows, well within the limit. I also realized that the first setting is changing the number of classes allowed, not fields, so I don't think that is my problem after all. I checked the Advanced Settings Utility on the other machine and it just had the default of 25, yet I could view the attribute table.

DanPatterson_Retired

you didn't change the attribute entries... check to see on the other machine how many rows there are in that table.

CaraAppel

Thank you! I was sure that this was the problem, because when I opened the Advanced Settings Utility, the number of classes was set to 25 and my raster has >100. I changed it to the maximum (256, see screenshot). However, I am still not able to view the attribute table. I increased the number of classes and made sure that the number of table entries does not exceed the settings. I have restarted ArcMap after applying these settings and even restarted my computer. Any idea if there is another step I need to do?

current settings trying to open the attribute table after increasing number of classes allowed

DanPatterson_Retired

I suspect that you have too many classes for your machine's setup.

You can try the

Advanced ArcMap Settings utility—Help | ArcGIS Desktop

to set it to a higher value for the raster table

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