Note this is the procedure for V9.3.1. When using Mosaic Datasets at V10, the method is similar, but terms have changed.
I'm assuming that you already have an ISDef that has been created with overviews defined and generated, and you want to add new imagery with say a newer date.
- Create a new field eg Year
In Service Properties, Field Properties, click on + for add Field. Set to metadata, Integer, Width 10
A Year field should be added.
- Select all records and use Calculate to set the Year of the previous data.
- In Service Properties, Client Interface control, Order Field - Highlight Year, so that it can be used as an Order field
- In Service Properties, Client Interface control, Allowed mosaic method - Highlight By Attribute, so that the By Attribute method is allowed
- In Service Properties, Default Client properties. Set default Mosaic Method to ByAttribute. Set the Order field to Year, Set Order base value 3000 (some value in the future)
- Add new data using the required raster type. When adding uncheck the option to generate overviews, so that overview a not automatically updated.
- Open table, select new records and use calculate to set the Year to the new value
- If you pan and zoom at larger scales you should now see the new imagery. At smaller scales (when overviews are being used) the older imagery will be displayed.
- In table also check the MaxPS values for the newly added data. It should be equal or larger then the values of smallest Service Overview values. If this is not the case then you will need to define new service overviews or force the MaxPS value to be larger.
- Build using the Generate derived images option. This will re-generate the overviews. Overviews that are no affected by the new imagery will not be changed. The system will only generate overviews for the tiles covering the new imagery.
- When zooming out you should now see the newer imagery.