Point Converter Help

The Point Converter is based on several programs developed by the National Geodetic Survey and the United States Geological Survey. This tool allows you to convert a set of tab, space, or comma-delimited x, y, and z (or longitude, latitude, and elevation) data points from many combinations of geographic projections, and horizontal and vertical datums. The Point Converter was designed primarily for users of Airborne Topographic Mapper (ATM) LIDAR data to convert ground survey data to the same system to which ATM data is referenced, namely ITRF94 geographic longitudes and latitudes and WGS-84 (ITRF94) ellipsoid elevations.

Instructions:

Format your data into 3 columns of x,y, and z values. If you have no z values, append a 0 at the end of every x,y line. The z values are always assumed to be in meters.
Paste these data into the text area entitled Paste Input Data Here.
Select your input and output conversion parameters. This conversion depends on your knowledge of the input data.
Click the Convert button at the bottom of the page. Your converted data will appear in the text box entitled Copy Output Data from Here.

For more information about the programs upon which the Point Converter is based:

General Cartographic Transformation Package (GCTP) - geographic projection software produced by the USGS National Mapping Division.
GEOID03 - ellipsoid to NAVD88 conversion software produced by the NOAA National Geodetic Survey.
VERTCON - NAVD88 to NGVD29 conversion software produced by the NOAA National Geodetic Survey.
NADCON - NAD83 to NAD27 conversion software produced by the NOAA National Geodetic Survey.