This directory contains:

latlon.dat: list of i,j,lat,lon,depth for all 14458 non-land grid cells
in Lake Michigan 2 km bathymetric grid.

mi_shore.dat: Lake Michigan shoreline data files converted from NGDC
 medium resolution vector shoreline data and shoreline classification
 data provided by Deborah Lee, GLERL.

mi_shore.doc: Documentation for the shoreline file.

mich2km.dat: Lake Michigan 2 km gridded bathymetric data derived from
 NGDC Lake Michigan 9 arc second bathymetry. The grid is defined on
 a Lambert conformal conic map projection with a central longitude
 of 86.5W and standard parallels of 43N and 45N.  The grid origin is
 at 41.5976372N 87.9898071W.  Depths are in meters below the chart datum
 of 176.0 m (IGLD 1985).
 
rgrid.pro: IDL program to read and plot bathymetric grid and shoreline.

rgrid.f: FORTRAN subroutines for reading bathymetric data and for
 map coordinate conversion (use these to replace RGRID, XDIST, YDIST,
 RLAT, and RLON - the new versions can handle bathymetric data files
 in both approximate polyconic and Lambert conformal conic projections)

sigmalev.pro: IDL program to plot the sigma levels for the 2 km Lake
 Michigan grid

sigmalev.txt: Vertical segmentation scheme for the Lake Michigan 2 km 
 hydrodynamic model simulations.  There are 40 sigma levels (39 layers) in 
 the segmentation. The top 20 layers cover the upper 25% of the water column 
 with uniform (delta sigma = 0.0125) vertical spacing. Between the 20th layer 
 and the bottom, layer thicknesses increase and decrease geometrically so 
 that the lowest layer thickness is also 0.0125.