METplus Practical Session Guide (Version 4.0) | METplus Setup > METplus: Directories and Configuration Files - Overview

METplus directory structure

A brief description and overview of the METplus/ directory structure can be found in the METplus User's Guide section called METplus Wrappers Directory Structure. The files/directories in ${METPLUS_BUILD_BASE} should match this list.


METplus default configuration file

Look inside the directory ${METPLUS_BUILD_BASE}/parm


Look at the METplus default configuration file:

ls ${METPLUS_BUILD_BASE}/parm/metplus_config

The METplus default configuration file (defaults.conf) is always read first. Any additional configuration files passed in on the command line are then processed in the order in which they are specified. This allows for each successive conf file the ability to override variables defined in any previously processed conf files. It also allows for defining and setting up conf files from a general (settings used by all use cases, ie. MET install dir) to more specific (Plot type when running track and intensity plotter) structure. The idea is to created a hiearchy of conf files that is easier to maintain, read, and manage. It is important to note, running METplus creates a single configuration file, which can be viewed to understand the result of all the conf file processing.

When METplus is run, the final metplus conf file is generated here:
Use this file to see the result of all the conf file processing, this can be very helpful when troubleshooting,

NOTE: The syntax for METplus configuration files MUST include a "[config]" section header with the variable names and values on subsequent lines.

More information about the default configuration variables can be found in the METplus User's Guide section called Default Configuration File.

The met_config directory (in ${METPLUS_BUILD_BASE}/parm) contains "wrapped" MET configuration files that are used by calls to the MET applications via the METplus wrappers. The wrappers set environment variables that control settings in the wrapped MET configuration files through these environment variables. See the METplus User's Guide section called How METplus controls MET configuration variables for more information.

METplus Use Cases

The use_cases directory - this is where the use cases you will be running exist. Under the use_cases directory are two directories: met_tool_wrapper and model_applications. The met_tool_wrapper directory contains use cases that run a single METplus wrapper. They are a good starting point to see how the wrapper scripts generate commands that run the MET tools. The model_applications directory contains more complex use cases that often run multiple wrappers and demonstrate real evaluations from users.

MET Tool Wrapper Use Cases

Look at the MET Tool Wrapper Use Cases

ls ${METPLUS_BUILD_BASE}/parm/use_cases/met_tool_wrapper

The met_tool_wrapper use case files are organized into subdirectories by wrapper, e.g. Example or GridStat. They contain METplus configuration files (ending with .conf). If a MET tool that is called by a use case uses a MET configuration file, the file used for the met_tool_wrapper use cases is found in parm/met_config.

  • met_tool_wrapper/Example - directory
  • met_tool_wrapper/Example/Example.conf - use case configuration file
  • met_tool_wrapper/GridStat - directory
  • met_tool_wrapper/GridStat/GridStat.conf - use case configuration file
  • parm/met_config/GridStatConfig_wrapped - MET configuration file used in the GridStat.conf use case


Model Application Use Cases

Look at the Model Application use cases

ls ${METPLUS_BUILD_BASE}/parm/use_cases/model_applications

The model_applications use case files are organized in directories by category, e.g. precipitation or data_assimilation. They contain METplus configuration files (ending with .conf). If additional files such as Python Embedding scripts are included with a use case, these files are found in a directory named after the METplus configuration file without the .conf extension.

  • model_applications/data_assimilation - directory
  • model_applications/data_assimilation/StatAnalysis_fcstHAFS_obsPrepBufr_JEDI_IODA_interface.conf - use case configuration file
  • model_applications/data_assimilation/StatAnalysis_fcstHAFS_obsPrepBufr_JEDI_IODA_interface - directory containing supplemental files for the use case
  • model_applications/data_assimilation/StatAnalysis_fcstHAFS_obsPrepBufr_JEDI_IODA_interface/ - script called by the use case


Example Use Case

Let's look at the Example use case, Example.conf, under met_tool_wrapper/Example

less ${METPLUS_BUILD_BASE}/parm/use_cases/met_tool_wrapper/Example/Example.conf

In this file are variables, denoted in ALL_CAPS. These can be modified as needed. In the METplus system, unmodified config files remain in the directories under ${MET_BUILD_BASE}, while user-modified files are stored in ${METPLUS_TUTORIAL_DIR}/user_config.

No changes are needed in Example.conf. Close it and continue to the next page.

Unless otherwise indicated, all directories are relative to your ${METPLUS_TUTORIAL_DIR} directory.