% $Id$


\subsubsection{Coordinate keyNames}
\label{const:coordkeyname}

{\sf DESCRIPTION:\\}
For ESMF to be able to use coordinates specified in a LocStream key (e.g. in regridding) 
they need to be named with the appropriate identifiers. The particular identifiers depend 
on the coordinate system (i.e. coordSys argument) used to create the LocStream containing 
the keys.  ESMF regridding expects these keys to be of type ESMF\_TYPEKIND\_R8. 

The valid values are:
\newline
\begin{tabular}{|l|c|c|c||}
\hline
\hline
Coordinate System & {\bf dimension 1}  & {\bf dimension 2} & {\bf dimension 3 (if used)} \\
\hline
{\bf ESMF\_COORDSYS\_SPH\_DEG}  & ESMF:Lon & ESMF:Lat & ESMF:Radius \\
{\bf ESMF\_COORDSYS\_SPH\_RAD}  & ESMF:Lon & ESMF:Lat & ESMF:Radius \\
{\bf ESMF\_COORDSYS\_CART}  & ESMF:X & ESMF:Y & ESMF:Z \\
\hline
\hline
\end{tabular}


\subsubsection{Masking keyName}
\label{const:maskkeyname}

{\sf DESCRIPTION:\\}
Points within a LocStream can be marked and then potentially ignored during certain 
operations, like regridding.  This masking information must be contained in a key 
named with the appropriate identifier.  ESMF regridding expects this key to be 
of type ESMF\_TYPEKIND\_I4.

The valid value is:
\begin{description}
\item [ESMF:Mask] 
\end{description}
