f_size_limits.f90 File Reference

File size and dimension limits for NetCDF classic formats (Fortran) More...

Functions/Subroutines
program	f_size_limits
subroutine	print_format_limits ()

Detailed Description

File size and dimension limits for NetCDF classic formats (Fortran)

This is the Fortran equivalent of size_limits.c, exploring size limitations of classic NetCDF formats using the Fortran 90 NetCDF API. The program demonstrates when format upgrades are necessary for large datasets.

Learning Objectives:

• Understand file size limits in Fortran NetCDF applications
• Learn when to upgrade from CDF-1 to CDF-2 or CDF-5
• Work with large integers (int64) for dimension calculations
• Recognize format-related errors in Fortran

Fortran-Specific Considerations:

• Use iso_fortran_env module for int64 type
• Integer kind selection for large dimension sizes
• Format selection impacts Fortran array size limits

Prerequisites:

• f_format_variants.f90 - Understanding format types
• size_limits.c - C equivalent for comparison

Related Examples:

• size_limits.c - C equivalent
• f_format_variants.f90 - Format comparison
• f_simple_nc4.f90 - NetCDF-4 format (different limits)

Compilation:

gfortran -o f_size_limits f_size_limits.f90 -lnetcdff -lnetcdf

Usage:

./f_size_limits

Note

Companion code for "The NetCDF Developer's Handbook: The Authoritative Guide to Writing High-Performance Programs for Scientific Data Management, Second Edition" (https://www.amazon.com/dp/B0H7Q1Z75L)

Author

Edward Hartnett, Intelligent Data Design, Inc.

Date

2026

Function/Subroutine Documentation

f_size_limits()

program f_size_limits

print_format_limits()

subroutine f_size_limits::print_format_limits

(

void

)