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Per #2887, tweak the wording.
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JohnHalleyGotway committed Oct 10, 2024
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Showing 1 changed file with 13 additions and 14 deletions.
27 changes: 13 additions & 14 deletions docs/Users_Guide/config_options.rst
Original file line number Diff line number Diff line change
Expand Up @@ -2347,9 +2347,9 @@ grid_weight_flag
----------------

The "grid_weight_flag" specifies how grid weighting should be applied
during the computation of contingency tables (CTC, MCTC, PCT, NBRCTC),
partial sums (SL1L2, SAL1L2, VL1L2, VAL1L2), and statistics (CNT, CTS,
MCTS, PSTD, PRC, PJC, ECLV, NBRCNT, and NBRCTS).
during the computation of contingency tables (CTC, MCTC, PCT, and
NBRCTC), partial sums (SL1L2, SAL1L2, VL1L2, and VAL1L2), and statistics
(CNT, CTS, MCTS, PSTD, PRC, PJC, ECLV, NBRCNT, and NBRCTS).
It is meant to account for grid box area distortion and is often applied
to global Lat/Lon grids. It is only applied for grid-to-grid verification
in Grid-Stat and Ensemble-Stat and is not applied for grid-to-point
Expand All @@ -2370,23 +2370,22 @@ the NetCDF output from Grid-Stat and Ensemble-Stat.

When computing partial sums and continuous statistics, the weights are
first normalized by dividing by the sum of the weights for the current
masking region.

When computing contingency tables and deriving statistics, each cell
contains the sum of the weights of the matching grid points rather than
the integer count of those grid points. Statistics are derived using these
sums of weights rather than the raw counts.
masking region. When computing contingency tables and deriving statistics,
each contingency table cell contains the sum of the weights of the matching
grid points rather than the integer count of those grid points. Statistics
are derived using these sums of weights rather than the raw counts.

When no grid weighting is requested (**NONE**), contingency tables are
populated using a default constant weightand the corresponding cells are
written to the output as integer counts.
populated using a default constant weight of 1.0 and the corresponding cells
are written to the output as integer counts for consistency with earlier
versions of MET.

.. note::

The FHO line type is not compatible with grid weighting. If requested
with grid weighting, Grid-Stat prints a warning message and automatically
disables the FHO line type. Users are advised to request the CTC line type
instead.
with grid weighting enabled, Grid-Stat prints a warning message and
automatically disables the FHO line type. Users are advised to request the
CTC line type instead.

.. code-block:: none
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