= PDAF_get_localfilter = 

This page documents the routine `PDAF_get_localfilter` of PDAF. 

The routine returns the information whether the chosen filter is a domain-localized filter (LESTKF, LETKF, LSEIK, LNETF). It can be called in assimilate_pdaf.F90 and the return value can be used to call either PDAFomi_assimilate_global or PDAFomi_assimilate_local (or PDAFomi_put_state_global or PDAFomi_put_state_local). The value is initialized after calling PDAF_init.

The routine is typically called in the model code in assimilate_pdaf.

The interface is the following:
{{{
  SUBROUTINE PDAF_get_localfilter(lflag)
}}}
with the following argument:
 * `lflag`: On output the integer index is[[br]]
   (1) for local filters,[[br]]
   (0) for global filters (including LEnKF, which performs covariance localization)


**Notes:**
 * The difference between the return values 0 and 1 is mainly the way how PDAF-OMI handles observations. 
 * New for PDAF3: For the ENSRF/EAKF, `lflag` is also 1. This is because the observation handling for the ENSRF/EAKF uses the same approach as for domain-localized filters
 * The value of `lflag` can be used, e.g. as
{{{
  IF (lflag == 1) THEN
    CALL PDAFomi_assimilate_local(...)
  ELSE
    CALL PDAFomi_assimilate_global(...)
  ENDIF
}}}