• NACIS Shaded Relief Homepage:  www.nacis.org/cp/cp28/resources.html
    The NACIS Shaded Relief Homepage provides a "how-to notebook" for presenting digital topography. The techniques included focus on 2D shaded relief maps and 3D landscape visualizations.

  • Detailed Meridional Parts Navigation Calculator  www.csgnetwork.com/marinemeridparts2calc.html
    The Navigation Calculator provides visitors a means of converting geographic coordinates (degrees) to kilometers, miles, etc.

  • North Carolina Geological Survey:  http://www.geology.enr.state.nc.us/gis/latlon.html
    A data calculator at the North Carolina Geological Survey provides visitors with a means to convert between decimal degrees and degrees-minutes-seconds.