VDatum
NOAA Center for Operational Oceanographic Products and Services, NOAA National Geodetic Survey and NOAA Office of Coast Survey
Features
- Transforms geospatial data among a variety of vertical datums (i.e., tidal, ellipsoidal, and orthometric datums)
- Transforms geospatial data among horizontal datums
- Supports conversion using several geoid models
- Converts between the National Geodetic Vertical Datum (NGVD) of 1929 and the North American Vertical Datum (NAVD) of 1988 using VERTCON
- Supports conversions between the International Great Lakes Datum (IGLD) of 1985 and NAVD88
Overview
VDatum converts elevation data between tidal, orthometric, and ellipsoidal vertical datums, allowing users to establish a common reference system for all elevation data sets. VDatum is unique since it is based on a hydrodynamic model to convert between tidal and orthometric datums.
Data Requirements
Elevation data – point data (ASCII) in geographic coordinates (latitude and longitude) and Universal Transverse Mercator (UTM) coordinates
Support
User Guide
Contains a step-by-step guide to the operation of the VDatum software