Grid Aggregation

RAMADDA User Guide > Data Facilities > Gridded Data

You can easily aggregate collections of grids in several different ways:

Aggregate a set of grid files that form a time series into one view (JoinExisting)
Aggregate a set of variables that are in different files which all have the same time and space dimesions (Union)
Aggregate a set of ensemble members of a model into one view (Ensemble).

To create a new grid aggregation, use the menu and select the Grid Aggregation item under the Geo Data category. This will bring up the Grid Aggregation form:

Options:

Name
Enter a name for this entry
Description
Optionally, add a description
Date Range
You can set the date range for the data.
Location
You can set the bounding box of the data location.
Aggregation type
Set the aggregation type. The choices are:
- JoinExisting - join the data along an existing time dimension.
- Union - join the data as a union of all the files (must have same temporal and spatial bounds)
- Ensemble - join the data as an ensemble of the individual fils (must have same temporal and spatial bounds and fields)
Time Coordinate
The name of the time coordinate for the JoinExisting aggregation
Fields
The name(s) of the variable(s) in the files that you want to aggregate for the Ensemble type.
Files
If you are an administrator, you can select a set of files on your local server (one per line) to use for this aggregation. You need to include the full path to the files in the name. You can optionally leave this blank and add files to the aggregation by hand.
File Pattern
If you are an administrator, you can set a directory name in the Files field and then give a file pattern (e.g. Foo*bar.nc) of the files you want to include in the aggregation.
Recurse
Set to Yes to recurse into sub directories
Ingest Files
Ingest the metadata into the database for the individual granules that make up the aggregation. Set this to Yes if you want to show the individual granules that make up the aggregation.
Spatial/Temporal Metadata
Ingest just the spatial/temporal metadata into the database
All Metadata
Ingest all metadata (spatial/temporal, variables, attributes) into the database
Owner
Specify the owner (admin) who has permission to modify and add to this entry.

When you click on the Add Grid Aggregation button, the entry will be created. If you specified a list of files, those will be included in the aggregation. If you specified Yes to Ingest Files, the individual files will be listed on entry page.