Contents
What is dimensions in netCDF file?
A netCDF dimension is a named integer used to specify the shape of one or more of the multi-dimensional variables contained in a netCDF file. A dimension may be used to represent a real physical dimension, for example, time, latitude, longitude, or height.
What is a variable dimension?
“Dimensions Variable” is the standard term for designating the size of an art object which varies or cannot be physically bounded.
How do I delete a variable in netCDF?
From the official NetCDF user guide: Attributes are more dynamic than variables or dimensions; they can be deleted and have their type, length, and values changed after they are created, whereas the netCDF interface provides no way to delete a variable or to change its type or shape.
What is the difference between variable and dimension?
A variable is just a placeholder for a quantity that’s unknown or changing. A dimension is the minimum number of coordinates necessary to accurately describe a point in any given type of space.
Can a dimension have unlimited length in netCDF?
A netCDF dimension has a name and a length. In a netCDF classic or 64-bit offset file, at most one dimension can have the unlimited length, which means variables using this dimension can grow along this dimension. In a netCDF-4 file multiple unlimited dimensions are supported.
How are variables defined in a netCDF file?
Variables for a netCDF file are defined when the file is created, while the netCDF file is in define mode. Other variables may be added later by reentering define mode. A netCDF variable has a name, a type, and a shape, which are specified when it is defined. A variable may also have values, which are established later in data mode.
How to create a variable in NetCDF in Fortran?
The function ncvardef(or NCVDEFfor FORTRAN) adds a new variable to an open netCDF file in define mode. It returns a variable ID, given the netCDF ID, the variable name, the variable type, the number of dimensions, and a list of the dimension IDs. In case of an error, ncvardefreturns -1; NCVDEFreturns a nonzero value in rcode.
How to access the metadata in netCDF file?
Accessing and reading of this information (i.e. metadata) can help you automate tasks, debug code, and validate results easily. This tutorial covers how to access information describing the metadata, dimensions, and variables contained in a netCDF file.