Lake Halbert 1999 Halbert1999.mdb geodatabase Boundary halbert83_arc: line lake boundary digitized from 7.5 minute USGS topo quad halbert83_poly: polygon feature class from line feature class (halbert83_arc) (83 means projected in NAD 83 state plane) cont_1: 1 ft contours cont_2: 2 ft contours halbert_pts: 1999 survey data points Halbert83_poly.shp: polygon shape file of lake boundary (from 7.5 mintute USGS topo quad) Halbert_cont_1.shp: 1 ft contours Halbert_cont_2.shp: 2 ft contours Halbert_pts.shp: 1999 survey data points alldata.csv: comma seperated file of survey data points (x,y,z) halbert_vol.txt: list of elevations areas volumes calculated from tin (-elev,square ft,cubic ft) area.table.txt: elevation area table formatted (in acres) volume.table.txt: elevation volume table formatted (in acre-feet)