First example showing how to make a group (or an ObsSpace). More...
#include <iostream>#include <string>#include <vector>#include "ioda/Engines/Factory.h"#include "ioda/Exception.h"#include "ioda/Group.h"
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Detailed Description
First example showing how to make a group (or an ObsSpace).
IODA is the Interface for Observation Data Access.
The objective of the IODA is to provide uniform access to observation data across the whole forecasting chain from observation pre-processing to data assimilation to diagnostics.
IODA isolates the scientific code from the underlying data structures holding the data. Of course, any user needs to have a basic understanding of how the data are laid out. How are the data grouped, how can you access the data, how can you interpret variable names, and how can you read dimensions and meta data?
Data in IODA are stored in a structure Groups, Variables, and Attributes. A Group is like a folder. It is a logical collection of Variables and Attributes that describes some portion of the overall data. A Variable stores bulk data. An Attribute stores smaller quantities of metadata, and can be attached to either a Group or a Variable.
In ioda-engines, we separate out how the data are stored (the backend engine) from how an end user can access it (in the frontend). Different backends all provide the same general interface, but may support slightly different features and will have different performance characteristics.
This example shows you how to create Groups. It creates an HDF5 file, "Example-01.hdf5" using the HDF5 backend. Later examples will use groups to store and read data.
Definition in file 01-GroupsAndObsSpaces.cpp.
