Get Site Ecological Site History

Gets the Site Ecological Site History data from local NASIS database. Used by get_extended_data_from_NASIS_db().

Usage

get_ecosite_history_from_NASIS_db(
  best = TRUE,
  SS = TRUE,
  es_classifier = NULL,
  dsn = NULL
)

best: Should the "best" ecological site correlation be chosen? Creates field called es_selection_method with "most recent" or "least missing data" for resolving many:1 relationships in site history.
SS: Use selected set? Default: TRUE
es_classifier: Optional: character. Vector of classifier names (and corresponding records) to retain in final result.
dsn: Path to SQLite data source, or a DBIConnection to database with NASIS schema.

a data.frame, or NULL on error