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Short Citation:
Office of Coast Survey, 2024: Vertical Datum Transformation,

Item Identification

Title: Vertical Datum Transformation
Short Name: vdatum
Status: Completed
Publication Date: 2015-12

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.



Supplemental Information:

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)


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
NOS Data Explorer Topic Category Geodetic/Global Positioning
None Coordinate Systems
None DTL
None ellipsoidal datums
None geocentric (ECEF)
None Geographic
None GEOID models
None GEOID03
None GEOID06 (Alaska only)
None GEOID09
None GEOID96
None GEOID99
None Horizontal Datums
None IGb00
None IGLD85
None IGS00
None IGS05
None IGS08
None IGS97
None ITRF2000
None ITRF2005
None ITRF2008
None ITRF88
None ITRF89
None ITRF90
None ITRF91
None ITRF92
None ITRF93
None ITRF94
None ITRF96
None ITRF97
None MHW
None MLW
None MTL
None NAD27
None NAD83
None NAD83 (1986)
None NAD83 (HARN)
None NAD83 serializations
None NAD83(MARP00)
None NAD83(PACP00)
None NAVD88
None NEOS 90
None NGVD29
None Orthometric Datums
None PNEOS 90
None SIO/MIT 92
None State Plane Coordinates (SPC)
None Tidal Datums
None UTM
None Vertical Datums
None WGS84
None WGS84 (G1150)
None WGS84 (G730)
None WGS84 (G873)
None WGS84 (transit)

Physical Location

Organization: Office of Coast Survey
City: Silver Spring
State/Province: MD

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

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

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

Support Roles

Data Steward

CC ID: 808936
Date Effective From: 2018-12-14
Date Effective To:
Contact (Person): Keown, Patrick
Address: 1315 East West Hwy
Silver Spring, MD 20910-3282
Email Address:
Phone: 240-533-0031


CC ID: 808937
Date Effective From: 2018-12-14
Date Effective To:
Contact (Organization): Office of Coast Survey (OCS)
Address: 1315 East West Highway
Silver Spring, MD 20910

Metadata Contact

CC ID: 808938
Date Effective From: 2018-12-14
Date Effective To:
Contact (Person): Keown, Patrick
Address: 1315 East West Hwy
Silver Spring, MD 20910-3282
Email Address:
Phone: 240-533-0031

Point of Contact

CC ID: 808939
Date Effective From: 2018-12-14
Date Effective To:
Contact (Person): Keown, Patrick
Address: 1315 East West Hwy
Silver Spring, MD 20910-3282
Email Address:
Phone: 240-533-0031


Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 495000
W° Bound: -180
E° Bound: 180
N° Bound: 90
S° Bound: -90

Access Information

Security Class: Unclassified
Data Access Procedure:

See Distribution Liability regard User Agreement for download.;

Data Access Constraints:


Data Use Constraints:


Distribution Information

Distribution 1

CC ID: 495001
Download URL:
Distributor: Office of Coast Survey (OCS) (2018-12-14 - Present)

Downloadable Data

File Type (Deprecated): Java



CC ID: 494993
URL Type:
Online Resource

Project webpage.


CC ID: 494994
URL Type:
Online Resource

Product support page.

Activity Log

Activity Log 1

CC ID: 495067
Activity Date/Time: 2015-09-22

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 495066
Activity Date/Time: 2017-04-05

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Catalog Details

Catalog Item ID: 39987
GUID: gov.noaa.nmfs.inport:39987
Metadata Record Created By: Tyler Christensen
Metadata Record Created: 2017-04-05 13:49+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:09+0000
Metadata Record Published: 2018-12-14
Owner Org: OCS
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-12-14
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-12-14