f_coord_vars.f90 File Reference

Demonstrates coordinate variables and CF convention metadata (Fortran) More...

Functions/Subroutines
program	f_coord_vars
subroutine	handle_err (status)

Detailed Description

Demonstrates coordinate variables and CF convention metadata (Fortran)

This is the Fortran equivalent of coord_vars.c, demonstrating coordinate variables and CF (Climate and Forecast) convention metadata using the Fortran 90 NetCDF API. The program creates a 2D temperature field with latitude and longitude coordinate variables following CF conventions.

Learning Objectives:

• Understand coordinate variables in Fortran NetCDF API
• Learn CF convention attributes (nf90_put_att)
• Master attribute definition and retrieval in Fortran
• Work with geospatial data in Fortran
• Verify equivalence with C version (coord_vars.c)

Key Fortran Concepts:

• Character Attributes: Use nf90_put_att with character strings
• Attribute Length: Fortran handles string length automatically
• Array Ordering: Temperature(NLON, NLAT) vs C temperature[NLAT][NLON]

Prerequisites:

• f_simple_2D.f90 - Basic Fortran NetCDF operations
• coord_vars.c - C equivalent for comparison

Related Examples:

• coord_vars.c - C equivalent
• f_unlimited_dim.f90 - Time-series with coordinates
• f_var4d.f90 - 4D data with multiple coordinates

Compilation:

gfortran -o f_coord_vars f_coord_vars.f90 -lnetcdff -lnetcdf

Usage:

./f_coord_vars
ncdump f_coord_vars.nc

Author

Edward Hartnett, Intelligent Data Design, Inc.

Date

2026

Function/Subroutine Documentation

f_coord_vars()

program f_coord_vars

handle_err()

subroutine f_coord_vars::handle_err

(

integer, intent(in)

status

)