Appendix B 



Cartographic Data Analysis and 



Coordinate Conversion 



Software used for all coordinate conversions and plotting of page-size charts: 



Terramodel (Plus HI Software, Inc., Atlanta, GA) DOS Version 8.40 for DOS-based personal 

 computers. 



Map products presented in this report: 



Horizontal coordinates: State Plane New York Long Island zone, NAD 27, units in feet. 1 

 Vertical units: Depths in feet below National Geodetic Vertical Datum (NGVD) or mean lower 

 low water (mllw) (as marked on individual sheets). The shoreline represents the mean high water 

 (mhw) line as depicted on National Oceanic and Atmospheric Administration (NOAA) 

 hydrographic charts. 



A table of factors for converting non-SI units of measurement to SI units can be found on page x. 

 Appendix B Cartographic Data Analysis B1 



