Vertical Datum Transformation

VDatum is a free software tool being developed jointly by NOAA's National Geodetic Survey (NGS), Office of Coast Survey (OCS), and Center for Operational Oceanographic Products and Services (CO-OPS).

VDatum is designed to vertically transform geospatial data among a variety of tidal, orthometric and ellipsoidal vertical datums -

VDatum allows users to convert their data from different horizontal/vertical references into a common system and enabling the fusion of diverse geospatial data in desired reference levels.

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VDatum software is written in Java so it runs on Mac OS X, Unix, VMP and Windows.

Where available and uncertainties are established, VDatum supports the conversions among following:

Coordinate Systems: Geographic, UTM, State Plane Coordinates (SPC), and geocentric (ECEF).

Horizontal Datums: NAD27, NAD83 (1986), and NAD83 (HARN); and ellipsoidal datums such as of ITRF, WGS84 and NAD83 serializations;

Vertical Datums:

(1) Ellipsoidal Datums: NAD83, WGS84, ITRF88, ITRF89, ITRF90, NEOS 90, PNEOS 90, ITRF91, ITRF92, SIO/MIT 92, ITRF93, ITRF94, ITRF96, ITRF97, IGS97, ITRF2000, IGS00, IGb00, ITRF2005, IGS05, ITRF2008, IGS08, WGS84 (transit), WGS84 (G730), WGS84 (G873), WGS84 (G1150), NAD83(PACP00), NAD83(MARP00);

(2) Orthometric Datums: NGVD29 and NAVD88;

(3) Tidal Datums: MLLW, MLW, LMSL, DTL, MTL, MHW, and MHHW;

(4) IGLD85

GEOID models: GEOID12A, GEOID09, GEOID06 (Alaska only), GEOID03, GEOID99, and GEOID96;

Supported file format: text (ASCII), LiDAR (.LAS) version 1.0 to 1.2, ESRI ASCII Raster (.ASC)

User directed to the VDatum Terms of Use Agreement prior to program data download.

NOAA/NOS's VDatum Terms of Use Agreement serves as evidence of the mutual understanding governing the transfer and subsequent use of the Vertical Datum Transformation software and its data ("VDatum") available from the entry point URL http://vdatum.noaa.gov.

By accessing, browsing and/or using vdatum.noaa.gov site, you signify and acknowledge that you have read and agreed to be bound by the following terms of the agreement.

See Distribution Liability regard User Agreement for download.;

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