MODE: Using Python Embedding

met_tool_wrapper/MODE/MODE_python_embedding.conf

Scientific Objective

Compare dummy forecast data to dummy observations. Generate statistics of the results.

Datasets

Forecast: Dummy text files found in the MET shared directory
Observation: Dummy text files found in the MET shared directory
Location: All of the input data required for this use case can be found in the met_test sample data tarball. Click here to the METplus releases page and download sample data for the appropriate release: https://github.com/dtcenter/METplus/releases
This tarball should be unpacked into the directory that you will set the value of INPUT_BASE. See ‘Running METplus’ section for more information.

METplus Components

This use case utilizes the METplus MODE wrapper to search for files that are valid at a given run time and generate a command to run the MET tool mode if all required files are found.

METplus Workflow

MODE is the only tool called in this example. It processes a single run time with three forecast leads. The input data are simple text files with no timing information, so the list of forecast leads simply duplicates the same file multiple times to demonstrate how data is read in via Python embedding.

METplus Configuration

METplus first loads all of the configuration files found in parm/metplus_config, then it loads any configuration files passed to METplus via the command line with the -c option, i.e. -c parm/use_cases/met_tool_wrapper/MODE/MODE_python_embedding.conf

[config]

# Documentation for this use case can be found at
# https://metplus.readthedocs.io/en/latest/generated/met_tool_wrapper/MODE/MODE_python_embedding.html

# For additional information, please see the METplus Users Guide.
# https://metplus.readthedocs.io/en/latest/Users_Guide

###
# Processes to run
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#process-list
###

PROCESS_LIST = MODE


###
# Time Info
# LOOP_BY options are INIT, VALID, RETRO, and REALTIME
# If set to INIT or RETRO:
#   INIT_TIME_FMT, INIT_BEG, INIT_END, and INIT_INCREMENT must also be set
# If set to VALID or REALTIME:
#   VALID_TIME_FMT, VALID_BEG, VALID_END, and VALID_INCREMENT must also be set
# LEAD_SEQ is the list of forecast leads to process
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#timing-control
###

LOOP_BY = INIT
INIT_TIME_FMT = %Y%m%d%H
INIT_BEG=2005080700
INIT_END=2005080700
INIT_INCREMENT = 12H

LEAD_SEQ = 12


###
# File I/O
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#directory-and-filename-template-info
###

FCST_MODE_INPUT_DIR =
FCST_MODE_INPUT_TEMPLATE = PYTHON_NUMPY

OBS_MODE_INPUT_DIR =
OBS_MODE_INPUT_TEMPLATE = PYTHON_NUMPY

MODE_OUTPUT_DIR = {OUTPUT_BASE}/met_tool_wrapper/MODE_python_embedding
MODE_OUTPUT_TEMPLATE = {valid?fmt=%Y%m%d%H}

FCST_MODE_FILE_WINDOW_BEGIN = 0
FCST_MODE_FILE_WINDOW_END = 0
OBS_MODE_FILE_WINDOW_BEGIN = 0
OBS_MODE_FILE_WINDOW_END = 0


###
# Field Info
# https://metplus.readthedocs.io/en/latest/Users_Guide/systemconfiguration.html#field-info
###

FCST_IS_PROB = false

FCST_VAR1_NAME = {MET_INSTALL_DIR}/share/met/python/examples/read_ascii_numpy.py {INPUT_BASE}/met_test/data/python/fcst.txt FCST

FCST_MODE_CONV_RADIUS = 5
FCST_MODE_CONV_THRESH = >=80.0
FCST_MODE_MERGE_THRESH = >=75.0
FCST_MODE_MERGE_FLAG = NONE

OBS_VAR1_NAME = {MET_INSTALL_DIR}/share/met/python/examples/read_ascii_numpy.py {INPUT_BASE}/met_test/data/python/obs.txt OBS
OBS_VAR1_LEVELS = P500

OBS_MODE_CONV_THRESH = >=80.0
OBS_MODE_CONV_RADIUS = 5
OBS_MODE_MERGE_THRESH = >=75.0
OBS_MODE_MERGE_FLAG = NONE


###
# MODE Settings
# https://metplus.readthedocs.io/en/latest/Users_Guide/wrappers.html#mode
###

#LOG_MODE_VERBOSITY = 2

MODE_CONFIG_FILE = {PARM_BASE}/met_config/MODEConfig_wrapped

MODE_REGRID_TO_GRID = NONE

MODE_MASK_MISSING_FLAG = BOTH

MODE_OUTPUT_PREFIX = FCST_vs_OBS

MODE_MERGE_CONFIG_FILE =

MODEL = WRF

OBTYPE = WRF

#MODE_GRID_RES = 4

MODE_QUILT = True

MODE_VERIFICATION_MASK_TEMPLATE =

MET Configuration

METplus sets environment variables based on user settings in the METplus configuration file. See How METplus controls MET config file settings for more details.

YOU SHOULD NOT SET ANY OF THESE ENVIRONMENT VARIABLES YOURSELF! THEY WILL BE OVERWRITTEN BY METPLUS WHEN IT CALLS THE MET TOOLS!

If there is a setting in the MET configuration file that is currently not supported by METplus you’d like to control, please refer to: Overriding Unsupported MET config file settings

Note

See the MODE MET Configuration section of the User’s Guide for more information on the environment variables used in the file below:

////////////////////////////////////////////////////////////////////////////////
//
// MODE configuration file.
//
// For additional information, see the MET_BASE/config/README file.
//
////////////////////////////////////////////////////////////////////////////////

//
// Output model name to be written
//
// model =
${METPLUS_MODEL}

//
// Output description to be written
//
// desc =
${METPLUS_DESC}

//
// Output observation type to be written
//
// obtype =
${METPLUS_OBTYPE}

////////////////////////////////////////////////////////////////////////////////

//
// Verification grid
//
// regrid = {
${METPLUS_REGRID_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Approximate grid resolution (km)
//
// grid_res =
${METPLUS_GRID_RES}

////////////////////////////////////////////////////////////////////////////////

//
// Run all permutations of radius and threshold
//
// quilt =
${METPLUS_QUILT}

//
// MODE Multivar boolean combination logic
//
//multivar_logic =
${METPLUS_MULTIVAR_LOGIC}

//multivar_intensity_flag =
${METPLUS_MULTIVAR_INTENSITY_FLAG}

//
// Forecast and observation fields to be verified
//
fcst = {
   ${METPLUS_FCST_FIELD}

   ${METPLUS_FCST_CENSOR_THRESH}
   ${METPLUS_FCST_CENSOR_VAL}
   ${METPLUS_FCST_CONV_RADIUS}
   ${METPLUS_FCST_CONV_THRESH}
   ${METPLUS_FCST_VLD_THRESH}
   ${METPLUS_FCST_FILTER_ATTR_NAME}
   ${METPLUS_FCST_FILTER_ATTR_THRESH}
   ${METPLUS_FCST_MERGE_THRESH}
   ${METPLUS_FCST_MERGE_FLAG}
   ${METPLUS_FCST_FILE_TYPE}
   ${METPLUS_FCST_MULTIVAR_NAME}
   ${METPLUS_FCST_MULTIVAR_LEVEL}
}

obs = {
   ${METPLUS_OBS_FIELD}

   ${METPLUS_OBS_CENSOR_THRESH}
   ${METPLUS_OBS_CENSOR_VAL}
   ${METPLUS_OBS_CONV_RADIUS}
   ${METPLUS_OBS_CONV_THRESH}
   ${METPLUS_OBS_VLD_THRESH}
   ${METPLUS_OBS_FILTER_ATTR_NAME}
   ${METPLUS_OBS_FILTER_ATTR_THRESH}
   ${METPLUS_OBS_MERGE_THRESH}
   ${METPLUS_OBS_MERGE_FLAG}
   ${METPLUS_OBS_FILE_TYPE}
   ${METPLUS_OBS_MULTIVAR_NAME}
   ${METPLUS_OBS_MULTIVAR_LEVEL}
}

////////////////////////////////////////////////////////////////////////////////

//
// Handle missing data
//
// mask_missing_flag =
${METPLUS_MASK_MISSING_FLAG}

//
// Match objects between the forecast and observation fields
//
//match_flag =
${METPLUS_MATCH_FLAG}

//
// Maximum centroid distance for objects to be compared
//
//max_centroid_dist =
${METPLUS_MAX_CENTROID_DIST}

////////////////////////////////////////////////////////////////////////////////

//
// Verification masking regions
//
//mask = {
${METPLUS_MASK_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Fuzzy engine weights
//
//weight = {
${METPLUS_WEIGHT_DICT}

////////////////////////////////////////////////////////////////////////////////

//
// Fuzzy engine interest functions
//
interest_function = {

   ${METPLUS_INTEREST_FUNCTION_CENTROID_DIST}

   ${METPLUS_INTEREST_FUNCTION_BOUNDARY_DIST}

   ${METPLUS_INTEREST_FUNCTION_CONVEX_HULL_DIST}

   angle_diff = (
      (  0.0, 1.0 )
      ( 30.0, 1.0 )
      ( 90.0, 0.0 )
   );

   aspect_diff = (
      (  0.00, 1.0 )
      (  0.10, 1.0 )
      (  0.75, 0.0 )
   );

   corner   = 0.8;
   ratio_if = (
      (    0.0, 0.0 )
      ( corner, 1.0 )
      (    1.0, 1.0 )
   );

   area_ratio = ratio_if;

   int_area_ratio = (
      ( 0.00, 0.00 )
      ( 0.10, 0.50 )
      ( 0.25, 1.00 )
      ( 1.00, 1.00 )
   );

   curvature_ratio = ratio_if;

   complexity_ratio = ratio_if;

   inten_perc_ratio = ratio_if;
}

////////////////////////////////////////////////////////////////////////////////

//
// Total interest threshold for determining matches
//
//total_interest_thresh =
${METPLUS_TOTAL_INTEREST_THRESH}

//
// Interest threshold for printing output pair information
//
print_interest_thresh = 0.0;

////////////////////////////////////////////////////////////////////////////////

//
// Plotting information
//
met_data_dir = "MET_BASE";

fcst_raw_plot = {
   color_table      = "MET_BASE/colortables/met_default.ctable";
   plot_min         = 0.0;
   plot_max         = 0.0;
}

obs_raw_plot = {
   color_table      = "MET_BASE/colortables/met_default.ctable";
   plot_min         = 0.0;
   plot_max         = 0.0;
}

object_plot = {
   color_table      = "MET_BASE/colortables/mode_obj.ctable";
}

//
// Boolean for plotting on the region of valid data within the domain
//
plot_valid_flag = FALSE;

//
// Plot polyline edges using great circle arcs instead of straight lines
//
plot_gcarc_flag = FALSE;

////////////////////////////////////////////////////////////////////////////////

//
// NetCDF matched pairs, PostScript, and contingency table output files
//
//ps_plot_flag =
${METPLUS_PS_PLOT_FLAG}

//nc_pairs_flag = {
${METPLUS_NC_PAIRS_FLAG_DICT}

//ct_stats_flag =
${METPLUS_CT_STATS_FLAG}


////////////////////////////////////////////////////////////////////////////////

shift_right = 0;   //  grid squares

////////////////////////////////////////////////////////////////////////////////

${METPLUS_OUTPUT_PREFIX}
//version        = "V10.0";

tmp_dir = "${MET_TMP_DIR}";

////////////////////////////////////////////////////////////////////////////////

${METPLUS_MET_CONFIG_OVERRIDES}

Python Embedding

This use case calls a Python script to read the input data. The Python script is stored in the MET repository: /path/to/MET/installation/share/met/python/read_ascii_numpy.py

read_ascii_numpy.py

Running METplus

This use case can be run two ways:

  1. Passing in MODE_python_embedding.conf then a user-specific system configuration file:

    run_metplus.py -c /path/to/METplus/parm/use_cases/met_tool_wrapper/MODE/MODE_python_embedding.conf -c /path/to/user_system.conf
    
  2. Modifying the configurations in parm/metplus_config, then passing in MODE_python_embedding.conf:

    run_metplus.py -c /path/to/METplus/parm/use_cases/met_tool_wrapper/MODE/MODE_python_embedding.conf
    

The former method is recommended. Whether you add them to a user-specific configuration file or modify the metplus_config files, the following variables must be set correctly:

  • INPUT_BASE - Path to directory where sample data tarballs are unpacked (See Datasets section to obtain tarballs). This is not required to run METplus, but it is required to run the examples in parm/use_cases

  • OUTPUT_BASE - Path where METplus output will be written. This must be in a location where you have write permissions

  • MET_INSTALL_DIR - Path to location where MET is installed locally

Example User Configuration File:

[dir]
INPUT_BASE = /path/to/sample/input/data
OUTPUT_BASE = /path/to/output/dir
MET_INSTALL_DIR = /path/to/met-X.Y

NOTE: All of these items must be found under the [dir] section.

Expected Output

A successful run will output the following both to the screen and to the logfile:

INFO: METplus has successfully finished running.

Refer to the value set for OUTPUT_BASE to find where the output data was generated. Output for this use case will be found in met_tool_wrapper/MODE_python_embedding/2005080712 (relative to OUTPUT_BASE) and will contain the following files: * mode_FCST_vs_OBS_120000L_20050807_120000V_120000A_cts.txt * mode_FCST_vs_OBS_120000L_20050807_120000V_120000A_obj.nc * mode_FCST_vs_OBS_120000L_20050807_120000V_120000A_obj.txt * mode_FCST_vs_OBS_120000L_20050807_120000V_120000A.ps

Keywords

Note

  • MODEToolUseCase

  • PythonEmbeddingFileUseCase

Navigate to the METplus Quick Search for Use Cases page to discover other similar use cases.

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