Frequently asked question

Why does a continuous raster dataset, loaded into a geodatabase, become discrete with a colormap?

Last Published: April 25, 2020


A continuous raster with a data depth of eight or less bits, and no colormap, will become a discrete raster of the same data depth with a colormap after being loaded into a geodatabase. This means the same file-based raster, which used the stretched renderer by default, will use the unique values renderer as the default after being loaded into a geodatabase.
In order to support a table for eight bit or lesser depth data in the geodatabase, a colormap table is created. Therefore, the data becomes discrete and color-indexed. By default it will be rendered with unique values, but will appear very similar as when it was a file-based raster layer.

Article ID:000003150

  • ArcMap 8 x

Receive notifications and find solutions for new or common issues

Get summarized answers and video solutions from our new AI chatbot.

Download the Esri Support App

Discover more on this topic

Get help from ArcGIS experts

Contact technical support

Download the Esri Support App

Go to download options