For MODFLOW, PHAST, and WellFootprint models, RowBoundaryPosition({Row}) returns the Y coordinate in the grid coordinate system of the position of the row boundary specified by its one optional argument Row. For SUTRA and MODFLOW 6 DISV models, Row returns zero. If the optional argument is not included, the function uses the row number of the node or element for which the formula is being calculated.
RowBoundaryPosition(1) returns the position of the northernmost edge of the grid in MODFLOW and WellFootprint.
RowBoundaryPosition(1) returns the position of the southernmost edge of the grid in PHAST.
