The raster is created from the finalized contour lines for September 2017, An estimated zero contour line is placed along the coast from Bay County to Pinellas County and along Volusia County. This contour aids in making a more reasonable surface along the coast, since water level vaues are less than the 10 foot contour interval shown on the contour map (see potentiometric contour map). Using the Topo to Raster tool, a 500 X 500 meter grid is created by using the September 2017 contour lines, the estimated zero contour line, estimated water value points along the suwannee river and the September 2017 water level data. The interpolated elevation value in each cell is in feet mean sea level, datum NGVD29.

The raster is created from the finalized contour lines for September 2017, An estimated zero contour line is placed along the coast from Bay County to Pinellas County and along Volusia County. This contour aids in making a more reasonable surface along the coast, since water level vaues are less than the 10 foot contour interval shown on the contour map (see potentiometric contour map). Using the Topo to Raster tool, a 500 X 500 meter grid is created by using the September 2017 contour lines, the estimated zero contour line, estimated water value points along the suwannee river and the September 2017 water level data. The interpolated elevation value in each cell is in feet mean sea level, datum NGVD29.