Create and populate mosaic datasets with CADRG/ECRG data.

1. Open ArcMap.
2. Set raster file format search mode to use file extensions.

Set the Search Mode to Search only files that match the following file extensions to find valid raster formats. Ensure that all format entries that start with "CADRG/ECRG" are checked. See Displaying specific raster formats for more information.

3. Create a file geodatabase.
4. Create mosaic datasets.

Run the Create CADRG/ECRG Mosaic Dataset model tool in the template toolbox to create two mosaic datasets in the new file geodatabase; one to store "standard", and the other to store "miscellaneous" CADRG/ECRG data. Set the Coordinate System parameter on the model tool to WGS_1984_Web_Mercator_Auxiliary_Sphere, because this coordinate system is used by Esri online services.

5. Add CADRG/ECRG datasets to the mosaic datasets.
• Run the Add Standard CADRG/ECRG Rasters To Mosaic Dataset model tool in the template toolbox to add standard CADRG/ECRG data to the standard mosaic dataset.
• Run the Add Miscellaneous CADRG/ECRG Rasters To Mosaic Dataset model tool in the template toolbox to add miscellaneous CADRG/ECRG data to the miscellaneous mosaic dataset.
6. Calculate mosaic dataset cell size ranges.

The cell size range is used to control which rasters in a mosaic dataset are processed to create the dynamically mosaicked image that is displayed. This behavior is controlled by the minimum and maximum pixel size values on each record in the mosaic dataset (MinPS and MaxPS fields respectively).

You could use the Calculate Cell Size Ranges tool, which examines the spatial relationship between rasters to determine the MinPS and MaxPS values; however, in the event you need to calculate these values on large volumes of datasets it can be more efficient to calculate these values based on a multiplier of the pixel size; a model tool named Calculate Raster Visibility has been included in the template toolbox to calculate these values based on this alternate approach.

• Run the Calculate Raster Visibility model tool in the template toolbox to calculate cell size ranges on the "standard" mosaic dataset; use the default High Pixel Size Multiplier value; for most cases, this is sufficient.
• Run the Calculate Cell Size Ranges tool to calculate cell size ranges on the "miscellaneous" mosaic dataset. Since "miscellaneous" data products typically don't have consistent spatial coverage between products, it's important to take the spatial relationship between rasters into account.
7. Build the mosaic dataset boundary.

The boundary determines the spatial extent of the mosaic dataset and can be used to clip the mosaicked image, i.e. only raster data that is contained within the boundary will be visible. The boundary is created using the Build Boundary tool or as an option when using the Add Rasters to Mosaic Dataset tool.

By default, the boundary is created by merging all raster footprints into a single or multipart polygon; which can result in a boundary with a large number of vertices, affecting draw performance. When creating mosaic datasets containing rasters covering the world's extent or when boundaries have large numbers of vertices (greater than 5000), it is recommended to use ENVELOPE as the Simplification Method.

Run the Build Boundary tool with the Simplification Method set to ENVELOPE on both mosaic datasets.

8. Modify the default properties on the mosaic datasets.

Properties can be set on the mosaic dataset that affect how the mosaicked image will be presented to the user and how they might interact with it. These properties can also impact the performance of the server or image service if the mosaic dataset is published as an image service. See Mosaic dataset properties for more information.

At a minimum, modify the following properties on both mosaic datasets:

• Maximum Number of Rasters per Mosaic - Because of the characteristics of CADRG/ECRG data, the default value of 20 for the maximum number of rasters that are dynamically mosaicked is not always sufficient to provide total screen coverage for any one particular CADRG/ECRG product; increasing this value to 50 is generally sufficient.
• Maximum Number of Items Downloadable per Request - Because it is recommended to store multiple CADRG/ECRG products within a single mosaic dataset, chances are that users will typically exceed the default value of 20 even when selecting seemingly small areas. Modify this property to best balance the needs of your users and the performance load on your servers.
• Maximum Download Size per Request (MB) - Used in conjunction with the Maximum Number of Items Downloadable per Request property, this property defines the maximum size limit that a user can download. Modify this property as required.
9. Define overviews.

You will be publishing the mosaic dataset containing the "standard" CADRG/ECRG data as a cached image service, which doesn't require overviews to be generated. However, since cached image services can be accessed dynamically, you can build overviews so the data will display at smaller scales when the service is accessed dynamically. See Mosaic dataset overviews for more information.

The Pixel Size parameter defines the raster pixel size of the first overview level and is in the same spatial reference units as the mosaic dataset, which in this case is meters. To generate overviews on just the Global Navigation Chart (GNC) data, the smallest scale CADRG/ECRG product, use a pixel size value that is between the MaxPS and the HighPS field values of the GNC data (7526.11 and 752.61); in this case the value 3020 is used.

Run the Define Overviews tool on the "standard" mosaic dataset using a Pixel Size parameter value of 3020.

10. Run the Build Overviews tool to build overviews on the "standard" mosaic dataset.