Knowledge Base - Technical Articles


Technical Article   HowTo:  Increase the maximum number of unique values allowed in a raster attribute table

Article ID: 35053
Software:  ArcSDE 9.2, 9.3, 9.3.1, 10 ArcGIS - ArcEditor 9.2, 9.3, 9.3.1, 10 ArcGIS - ArcInfo 9.2, 9.3, 9.3.1, 10 ArcGIS - ArcView 9.2, 9.3, 9.3.1, 10
Platforms:  Windows XP, Server 2003, Vista

Summary

When a raster dataset that has more than 65,536 unique values is rendered, an error message that there are too many unique values may display. Instructions provided describe how to increase the maximum number of unique values allowed in a raster attribute table.

Procedure

To edit the unique values for a raster attribute table, follow the steps below:

  1. In ArcMap or ArcCatalog, click Tools > Options.
    (In ArcGIS 10, click Customize > ArcMap Options.)
  2. Click the Raster tab.
  3. Select the sub-tab named Raster Attribute Table.
    (In ArcGIS 10, it is on the Raster Dataset sub-tab.)
  4. Increase the maximum number.

Created: 6/18/2008
Last Modified: 6/3/2014

Article Rating: (4)
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Comments

By dhockman-wert - 04/05/2014 3:10 PM

Great article! It helped a lot!

@jhaney74 Even if the "Apply" button is grayed out, click OK. It works just fine in Win7, Arc 10.2 @mant 1.4 billion unique values? Do you really need that many? Must be quite a raster.

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By jhaney74 - 11/06/2012 1:22 PM

The article is incorrect or the solution didn’t work.

It did not work. The "Apply" button is greyed out and cannot be clicked on after changing the "Maximum number of unique values to render". Please update the article and make it correct. Thank you.

Rating:

By mant - 05/29/2011 12:14 PM

The article is incorrect or the solution didn’t work.

I have changed the maximum number to "1410065407" and I still have an error message. Win7, ArcGIS 10

Rating:

By Anonymous - 11/03/2008 3:16 PM

Great article! It helped a lot!

THANK YOU, Thank You, thank you

Rating: