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Vertical Datum Transformation
Integrating America's Elevation Data

Welcome to VDatum!

VDatum is a free software tool being developed jointly by NOAA'sNational 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 - allowing 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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Download v4.7

Download the latest VDatum (v4.7) and its datasets.

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Tampa Bay Bathy/Topo Mreged DEM - the VDatum initial project

Features

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

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_2011, NAD83_1986, NAD83_FBN, and NAD83_HARN; and ellipsoidal datums such as of ITRF, WGS84, and NAD83 serializations

  • Vertical Datums: 

    • Ellipsoidal Datums: NAD83_2011, WGS84, ITRF88, ITRF89, ITRF90, NEOS 90, PNEOS 90, ITRF91, ITRF92, SIO/MIT 92, ITRF93, ITRF94, ITRF96, ITRF97, IGS97, ITRF2000, ITRF2020, IGS00, IGb00, ITRF2005, IGS05, ITRF2008, IGS08, ITRF2014, IGS14, WGS84(transit), WGS84(G730), WGS84(G873), WGS84(G1150), WGS84(G1674), NAD83(PACP00), NAD83(MARP00)

    • Orthometric Datums:   NAVD88, NGVD29, PRVD02, VIVD09, ASVD02, GUVD04, NMVD03, HAWAII EGM2008, EGM1996, and EGM1984

    • Tidal Datums: MLLW, MLW, LMSL, DTL, MTL, MHW, LWD, MHHW and Local Tidal(LT)

    • IGLD85, LWD IGLD 1985, OHWM IGLD 1985

  • GEOID models: GEOID18, GEOID12B, GEOID12A, GEOID09, GEOID06 (Alaska only), GEOID03, GEOID99, and GEOID96

  • EGM models: EGM2008, EGM1996, and EGM1984

  • xGEOID models: xGEOID16b (BETA), xGEOID17b (BETA), xGEOID18b (BETA), xGEOID19b(BETA), and xGEOID20b(BETA)

  • Supported file format: text(ASCII), LiDAR(.LAS, *.LAZ) version 1.0, 1.1, 1.2 and 1.4 with Classification, ESRI ASCII Raster(.ASC), ESRI 3D shapefile

  • NOAA VDatum APIs:  Full API