You have a mosaic dataset from your client. You want to use the mosaic dataset with other spatial data on the web. When you import the data into ArcMap, you realize that the mosaic dataset is in NAD 1983 HARN UTM Zone 5N. How do you change the projection to WGS 1984 Web Mercator Auxiliary?

Explanation:

Once a mosaic dataset as been created, the projection of the dataset cannot be changed or altered. Although the spatial reference section can be edited by going to mosaic database properties, then edit spatial reference section.

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