Revision Log

Recent VDatum news, including new VDatum application areas and software release announcements are posted on this page. To receive the same news via email, please subscribe to our VDatum's vdatum.announce mailing list.

VDatum 4.7 is released!

• Enhancement of Shapefile format usage with NAD83(2011) and NAVD88 UTM projections
• Enhancement on API response for PRVI region transformations
• Enhancement on resulting uncertainty associated with NADCON5 integration
• Western Gulf of Mexico Regional Model, version 01
• Refined regional boundaries
• Bug fix in MHHW to EGM08
• Bug fix for GEOID18 overriding xGEOID
• Bug fix on ellipsoidal transform, NAD83(2011) to IGS in West Coast region
• Bug fix in online application for transformation to NGVD29
• Bug fix on Columbia River transformation, CRD(GEOID09) to LMSL

VDatum 4.6.1 is released!

• Enhancements to vertical uncertainty calculations
• Capability to select 1 sigma or 95% Confidence uncertainty output metric.
• Allows user to add additional observational uncertainty (e.g., GNSS observational uncertainty, lidar uncertainty, DEM uncertainty) into the vertical uncertainty calculation.
• Bug fix to resolve vertical gap between tidal grids of the New York/Connecticut/Rhode Island, Outer NY Bight and New Jersey/New York/Connecticut, Northern NJ/NY Harbor sub regions. With the updated tidal grids, the grid version of the New York/Connecticut/Rhode Island, Outer NY Bight sub region has been changed to 4.4
• Bug fix for corrupt TSS in Washington- Coastal sub region
• Bug fix to correct LAS georeferencing issues
• Bug fix to resolve ascii file and UTM issue
• Bug fix to resolve PR/USVI regional model not working on online web application
• Bug fix to resolve MLLW to NGVD29 and NGVD29 to MLLW differing results
• Bug fix to resolve issue when utilizing ascii file conversion in online web application

VDatum 4.6 is released!

• Bug fix to allow input of UTM coordinates in American Samoa
• Bug fix associated with wrong UTM zone number in LAS conversion for NAD83(2011) UTM
• Bug fix for consistency between NCAT and VDatum results when utilizing various NAD83 realizations and a particular use of GEOIDs
• Bug Fix to resolve inconsistencies noted between the command line and the GUI while applying a point transformation from WGS84 (transit) to NAD83(2011)/NAVD88.
• Bug fix for consistency between NCAT and VDatum when converting between NAD83(1986) and NAD83(2011)
• Bug fix when using ESRI ASCII Raster Issue and converting IGS14/Geog/MHHW to NAD83(HARN)/State Plane/NAVD88.

VDatum 4.5.1 is released!

• Bug fix on WESTCOAST, incorrect vertical reference frame does not match for ITRF (ex ITRF2008 should be ITRF2008 in Vertical Reference)
• Bug fix with issue of Target Horizontal unit selection being disabled once it is SPC.
• Bug fix for incorrect output when similar Ellipsoidal references are provided (ex ITRF2014/ITRF2014 - ITRF2014/ITRF2014) and desiring to specify different Input and Output date position(s).
• Bug fix during SPC transformation from NAD83(2011)/NAVD88 to NAD27/NGVD29, the Northing/Easting values on Target may not be correct if both Source Horizontal and Target Horizontal units are "US_FT".
• Bug fix for West Coast and Chesapeake-DE, for differences between resulting heights with the WEB and PC versions when transforming NAD83/NAD83 to IGS14/LMSL

VDatum 4.5 is released!

• Bug fix for converting MLLW US/FT to MLLW Meter and vice versa
• Bug fix on wrong UTM zone number in LAS conversion for NAD83(2011) UTM
• Fixed West Coast VDATUM Tidal to NGVD29 result
• Fixed NAVD88 to EGM2008 HTDP transformation result
• Implement ITRF2014 EPSG code 7912 into the app, and added ITRF2014 in WKT list
• Bug fix on LAS file conversion logic flow issue
• Bug fix for American Samoa GEO To GEO Resolves incorrect output for NAD83(PA11/PACP00)/NAD83(PA11/PACP00) - NAD83(1993)/NAD83(1993)
• Bug fix for CONUS GEO to GEO incorrect Height output NAD83(2011)/LWD - NAD83(2011)/NAD83(2011)
• Bug fix for HAWAII SPC to GEO incorrect Height output NAD83(1993)/W0_USGG2012 - NAD83(PA11/PACP00)/NAD83(PA11/PACP00)
• Bug fix for HAWAII SPC to GEO , UTM, SPC incorrect Height output NAD83(1993)/NAD83(1993) -NAD83(PA11/PACP00)/NAD83(PA11/PACP00) vice versa
• Bug fix for American Samoa SPC to GEO when Us(ft) incorrect height output NAD83(1993)/NAD83(1993) - NAD83(PA11/PACP00)/NAD83(PA11/PACP00) vice versa
• Bug fix for SEAK SPC to GEO when Us/FT/M incorrect height output NAD(83)2011/NAD(83)2011 - IGS08/MHW
• Bug fix for CONUS SPC to GEO when Us/FT/M incorrect height output NAD83(HARN)/NAD83(HARN) - NAD83(2007)/NAD83(2007)
• Bug fix for CONUS SPC to GEO when Us/FT incorrect height output for NAD83(2011)/NAD83(2011) - NAD83(2007)/NAD83(2007)
• Bug fix for PRV SPC to GEO, UTM, SPC incorrect height output for NAD83(2002)/NAD83(2002)- NAD83(2007)/NAD83(2007) VICE VERSA
• Bug fix for AMERICAN SAMOA XYZ to GEO, UTM, SPC incorrect height output forITRF2008/ITRF2008 - NAD83(PA11/PACP00)/NAD83(PA11/PACP00)
• Bug fix for AMERICAN SAMOA XYZ to GEO, UTM incorrect height output (-999999) for ITRF2008/ITRF2008 - NAD83(PA11/PACP00)/ASVD02
• Bug fix for CONUS XYZ to GEO, UTM, SPC incorrect height output (-999999) for ITRF2008/ITRF2008 - NAD27/NGVD 1929
• Bug fix for CONUS XYZ to GEO, UTM, SPC incorrect height output (-999999) for ITRF2008/ITRF2008--NAD83(MA11/MACP00)/GUVD04
• Bug fix for HAWAII XYZ TO UTM & SPC incorrect height output for ITRF2008/ITRF2008 -NAD83(PA11/PACP00)/NAD83(PA11/PACP00)
• Bug fix for HAWAII XYZ TO UTM & SPC incorrect height output for ITRF2008/ITRF2008 -NAD83(PA11/PACP00)/W0_USGG2012
• Bug fix for Puerto Rico - XYZ TO UTM & SPC incorrect height output for I ITRF2008/ITRF2008 - NAD83(2007)/PRVD02/VIVD09
• Incorrect height result when processing combination roadmap of NAD2011/NAD2011 to Tidal for West Coast and Chesapeake-DE, individual transformation components correct, only occurs in combination transformations.

VDatum 4.4.2 is released!

• Enhancement on point validation in West Coast regions
• Bug fix on online CSV file conversion

VDatum 4.4.1 is released!

• Enhancement on point validation in West Coast regions
• Bug fix on EGM conversion

VDatum 4.4 is released!

• Updated Continental United States West Coast Regional Model, that includes Spatially Varying Uncertainty (SVU)
• Changed button text to be "Transform" instead of previous "Convert"
• Updated website to include information on Interpolation usage
• Partial Implementation of new HTDP version 3.4.0 (the following regions have been implemented, with additional to be incorporated in the near future)
• Regional Boundaries
• Region 1: San Andreas fault in central California
• Region 2: southern California
• Region 3: northern California
• Region 4: Pacific Northwest
• Region 5: western CONUS
• Region 6: CONUS
• Region 7: St. Elias, Alaska
• Region 8: south-central Alaska
• Region 9: southeast Alaska
• Region 10: all mainland Alaska
• Regions inserted to make compatible with new initbd.f that contains tectonic plates added in December 2020 (v3.3.0).
• Region 11: placeholder region
• Region 12: placeholder region
• Region 13: placeholder region
• Tectonic plates: All plate boundaries are from Bird 2003 with minor topological corrections. Main four plates included through v3.2.9:
• Region 14: North America (NA)
• Region 15: Pacific (PA)
• Region 16: Caribbean (CA)
• Region 17: Mariana (MA)
• Enhancement on the online layer to keep the previous layer selection after conversion refresh
• Enhancement on particular regional model grids by using IGS08 or IGS14 instead of NAD83_2011
• Reduced displayed SVU to one thousandth
• Bug fix in command line conversion on a single point, when the VDatum app returned an error message "unsupported horizontal datum"
• Bug fix on Full API [region] issue for "Chesapeake/Delaware Bay"
• Bug fix on Chesapeake-Delaware Bay conversion from NAVD88 to Tidal and the reciprocal consistent
• Bug fix on Chesapeake-Delaware Bay US/ft to US/ft
• Bug fix on command line involving null pointer issue when processing single point
• Bug fix on LAS command Line processing, causing incorrect output horizontal coordinates
• Bug fix on incorrect conversion results between EGM and NAVD88
• Updated API documentation [Request URL] for Full API to be "convert" instead of "tidal"
• Bug fix in SPC conversion, unlocking target SPC zone availability
• Bug fix on SPC conversion, correcting easting and northing coordinates associated with U.S. ft conversion
• Bug fix on SPC conversion, incorrect height result when converting SPC to Geographic, NAD83s to MACP00 for GUAM
• Bug fix on SPC conversion, incorrect height result when SPC to Geographic, NAD83s to MACP00 for America Samoa
• Bug fix on SPC conversion, incorrect height result when SPC to Geographic, NAD83s to PACP00 for Hawaii
• Bug fix on SPC conversion, incorrect height result when SPC to Geographic, ASVD02 to MACP00 for America Samoa
• Unable to select NAD83 realizations in Target reference for Hawaii

VDatum 4.3 is released! (Updated on September 28, 2021)

• Enhancement on SVU calculation when there was a UTM and State Plane combination
• Bug fix on CSV Uploading Error on Online application
• Bug fix on UTM and State Plane conversions when tidal datums are both source and target
• Bug fix for failed transformations when trying to convert multiple points
• Bug fix for failed transformations when the target datum was selected as IGLD85
• Bug fix on ASCII file conversion issue where transformation failed after 4096 line when xGEOID and EGM Models were involved within roadmap
• Added new feature to output WKT information into log file for file conversion formats

VDatum 4.2 is released! (Updated on June 02, 2021)

• Switch of position for "Latitude" and "Longitude" input fields on GUI and Online application for consistency with NCA
• Switch of position for "Northing" and "Easting" input fields on GUI and Online application for consistency with NCAT
• Fixed GeoTiff and IMG conversion issue when units were not meters
• New support for xGEOID20b (BETA)
• New support for GEOID18 Spatially Varying Uncertainty
• New support for varying uncertainty associated with individual hybrid GEOIDs
• Disable GEOID selection in NGVD29 to NAVD88 conversions
• Removed source uncertainty from NGVD29 to NAVD88 conversions to align with uncertainty provided by NCAT and VERTCON 3.0 release 20190601
• Opened up NGVD29 to NAVD88 in Alaska, Local Tide “LT” conversion with PRVD02, VIVD09, ASVD02, NMVD03, and GUVD63 conversion to GUVD04 associated with the VERTCON 3.0 release 20190601
• Bug fixes on ASCII file conversion which is more than 4096 lines
• Bug fixes on Tidal API for WGS84(transit) transformations
• ASCII Files have Spatially Varying Uncertainty in supported Regional Models
• Enhancements on Valid, Non-valid, Non-tidal Layers in the online tools
• Ability to force UTM zones in the command line
• Capability to change names of result file
• Full VDatum API (BETA)
• Modify Vertical uncertainty unit to be the same as Target Vertical unit (meter, ft, us_ft)
• Bug fixes on unit converting issue for NAD27 frame
• Enhancement on GEOID18 gtx
• Bug fixes on Source Horizontal Unit issues on NAD27 frame
• Bug fixes on Feet to meters conversion in NAD27 Geographic to NAD27 State Plane

VDatum 4.1.2 is released!

• Fixes NGVD29 unit conversion issue
• New button [Clean up] on Epoch page
• New button [Clear All] on Transformation history window
• Fixes pop-up bug on Epoch window in the package
• Enhancement of reading method on Lidar version-1.4

VDatum 4.1.1 is released!

• Enhancement of NAD83(PA11) and NAD83(MA11) to work with State Plane Coordinates
• Fixes Combined Factor issue
• Fixes Feet to Meter conversion issue
• Fixes an issue in online version that caused the GEOID value missing during ASCII Conversion
• Enhancement on GEOID list and selection
• Fixes a broken link bug for AK - Southeast on download page

VDatum 4.1 is released!

• Integration of VERTCON
• Integration of Spatially Varying Uncertainty (SVU) on 4 regions below:
• New Jersey - coastal embayment - North, Version 1.2
• New York - The Great South Bay, Version 3.4
• New Jersey/New York/Connecticut – Northern NJ, NY Harbor, western Long Island Sound, Version 3.4
• New York/Connecticut/Rhode Island – Outer NY Bight, eastern Long Island Sound, Block Island Sound, Version 3.4
• Support for GEOID18
• Support for xGEOID19b (BETA)
• Support for ITRF 2014
• Fixes an issue that could cause Well Known Text problem during Geotiff converting
• Fixes missing NoData value issue on Geotiff converting
• Fixes NAD27 SPC zone list issue
• Fixes NADCON5 converting issue
• Fixes PRVD02 converting issue
• Enhancement of xGEOID transform for multiple points
• Fixes command line issue calling HTDP without Epoch details when processing text files
• Fixes NullPointer Error when processing -9999 or No Data values during GeoTiff file conversion

VDatum 4.0.1 is released! Bug fixes on v4.0

• Fixes Earth-centered Earth-fixed XYZ conversion issue
• Fixes US Foot conversion issue in SPC conversion
• Fixes EPSG codes applying issue on LiDAR converting
• Fixes a bug on NAD83(MA11)
• Fixes a bug on US Foot conversion issue in EGM and XGEOID
• Enhancement on SEAK
• Updates on Command-line User Guide for Region Number

VDatum 4.0 is released!

• Integration of NADCON 5.0
• Added parameter [Region] for integration of NADCON 5.0
• Support for xGEOID18b (BETA)
• Integrateion of ERDAS Imagine (.img) format file
• Support for gtx2img
• Support for Southeast Alaska Regional Model
• Support for Ordinary High Water Mark (OHWM) relative to IGLD 1985
• Updated layers on map for 4.0
• Masked Non Valid
• Non Tidal
• Valid Tidal Transform
• Southeast Alaska
• Updated tidal API for integration of NADCON 5.0
• Added parameter [Region] in request parameter. The default value is "contiguous"
• Use value "NAD83_2011" to replace previous value "NAD83" in [Horizontal Frame Name] and [Vertical Frame Name]
• Bug fixes
• LAS Performance Optimization
• Changed web page tab under "About VDatum" which is currently "Current Events" to "Revision Log"

VDatum 3.9 is released!

• Updated all layers on map
• IGLD85 (International Great Lakes Datum)
• Masked Non Valid
• Non Tidal
• Valid Tidal Transform
• Converted Survey to Google Form
• Tidal API by using Geographic Coordinates
• Coordinate Transformation input and output has been set to 10 decimal places for decimal degrees and 5 decimal places for degrees-minutes-seconds.
• Bug fixes
• ESRI ASCII Raster format file: Fixed CELLSIZE transformation issue
• xGEOID17: Fixed conversion issue from NAVD to xGEOID17b
• HTDP: Fixed conversion issue from ITRFxx to NAVD88

VDatum 3.8 is released!

• New support for xGEOID17b (BETA)
• New support for LiDAR 1.4 (.LAS)
• New support for LiDAR LAZ format (On Windows OS)
• New support for LAS Classification field selection
• New support for LAZ Classification field selection (On Windows OS)
• New HTDP feature for File Transform
• Add IGLD85 layers on map
• Enhancement on Geotiff conversion
• Bug fixes
• HTDP epoch selection is offered for conversion NAD83(2011)/NAVD88 to ITRF/EGM
• HTDP epoch selection support for xGEOID16B (BETA) & xGEOID17b (BETA)
• Support EGM1996(WGS84_G1674) when vertical reference is ASVD02, GUVD04, NMVD03, PRVD02 or VIVD09 in VDatum downloadable version
• Fixed "Invalid source SPC zone number [0]" error for NAD1986/NAVD88 in VDatum Web version
• Fixed an issue on retaining GEOID Model for EGM Orthometric Datum in VDatum Web version
• LAS UTM Zone problem with horizontal conversion

VDatum 3.7 is released!

• Support transformation on GeoTiff format data file.
• Tidal grids versioning in report.
• LWD information to Datum Tutorials.
• Update to HTDP to support input epoch.
• Added WGS84(G1762) ellipsoidal datum reference frame
• Added new Grid for South Florida Tidal Regions.
• New support for xGEOID16b (BETA)
• New support for GeoTIFF
• Updated Tidal area map
• New feature - Drive to point on map

VDatum 3.6.1 is released! A hot fix is added on v3.6!

• Fixed an issue in version 3.6 with the Lidar LAS conversion providing incorrect horizontal coordinates

VDatum 3.6 is released!

• New support for GEOID12B
• Phase 1 uncertainty calculation
• 3D shapefile format conversion
• New support for EGM1984, EGM1996, and EGM2008
• Support for additional decimal places in height for LAS format

VDatum 3.5 is released!

• Fixed biquadratic algorithm errors.
• Corrected the support of two vertical datums: VIVD09, PRVD02.

VDatum 3.4 is released!

• Fixed an issue in LambertTransform that causes errors in NAD27 SPC to geographic conversions.
• Fixed an issue in TranverseMercator that causes errors in UTM to geographic conversions.
• Fixed an issue in ESRI ASC file transform that did not allow converting large files.
• Added field max_records in vdatum.inf that allows users to increase the number of elevation points/records to be read and processed at a time in VDatum File Transform.
• and cosmetic bugs fixed.

VDatum 3.3 is released!

We highly recommend that you completely remove the old VDatum (3.2 or earlier) together with all of its transformation grids, and install version 3.3 with its data.

• Increased the number of elevation points read at once to decrease the processing time;
• Added ESRI ASCII Raster Format (.asc),
• Fixed an issue where the last line of a transformation grid wasn't read in memory, which caused abnormal output outside of grid extents (recognized in Maine);
• Fixed IGLD85 model in order to match with NGS Toolkit' IGLD85 tool,
• Fixed SPC' combine factor calculation,
• Fixed an issue where geoid.inf file not found,
• Allowed LiDAR file transform with invalid return numbers (return number = 0, or return number is greater than the maximum return),
• Added Maine (2000) SPC zones, code 1811, 1812 and 1813,
• Separated NAVD88 from other non-CONUS vertical datums,
• and cosmetic bugs fixed.

VDatum 3.2 is released!

• Fixed SPC conversions in NAD27 to match with NGS's GPPCGP results,
• Fixed a bug that caused an infinite loop when processing ASCII files,
• Fixed LAS file conversion that involved GEOID transformations,
• Fixed an issue with ellipsoidal transformations,
• Added these capabilities for ASCII file conversions: appending results, skipping header lines,
• Added Scale factor, Convergence and Combined factor for SPC and UTM outputs,
• Added a capability to report Point Conversion,
• and cosmetic bugs fixed.

VDatum 3.1 is released!

- Fixed: GEOID transform only worked with NAVD88
- Matched with HTDP 3.2.3: changed NAD83(NSRS2007/CORS96/HARN)to NAD83(2011/2007/CORS96/HARN), equated WGS84(G730) to ITRF91
- Allowed ASCII File Transform to work with different angular formats (dd mm ss.xxxx, dd mm.xxxx or dd.xxxx)

Known issue: SPC conversions in NAD 27 don't match with NGS's GPPCGP results.

VDatum 3.0 is released!

- Added State Plane Coordinate transform.
- Added Low Water Datum (LWD) available in non-tidal areas.
- Automatically detect tidal areas in tidal transformation.
- Added GEOID96. Please remove all old GEOID transformation grids (/core/gxx) and replace with the renamed datasets.
- Allowed converting between different GEOID models.
- Added LiDAR (*.LAS) transform. Supports LAS version 1.0, 1.1 and 1.2.
- Allowed excluding NODATA results in File conversion (i.e. removing results of -999999)
- and more

VDatum 2.3.5 is released!

- Added GEOID12
- Fixed bug that leads to set horizontal datum as NAD 83(1986)

VDatum 2.3.4 is released!

- Removed WGS 72 datum from the ellipsoidal datum lists,
- Set GEOID09 as the default GEOID model,
- Added GUVD04, ASVD02, NMVD03, PRVD02 and VIVD09
- Fixed ITRF92 and WGS 84(G730) transformation parameters.

The Beta release for VDatum 3.0. This release automatically detects tidal regions for users' elevation data and returns the appropriate tidal transformation based on the tidal bounding polygons.

Here are some other additional features: 

• Horizontal datum transformations have been extended to allow transformations among ellipsoidal datums,
• ITRF 2008 has been added,
• More choices have been added for input and output coordinates. For example, more coordinate systems (geographic, UTM or geocentric XYZ) , distance/length units (meter, US foot or international foot)

In the next stage, we will focus on making the file conversions run more efficiently, add a command-line mode, and support State Plane Coordinate Systems.

version 2.3.3 released!

- Fixed bug in makeGTXname method which caused the program to be unable to work in Unix.
- Fixed bug in checking varea.inf when not needed

version 2.3.2 released

- Fixed bug in checking tidal null value in the biquadratic interpolation method, which caused interpolation with null values in tidal grids.

version 2.3.1 released!

- Fixed bug in checking tidal null value in GTX, which caused null returns in VERTCON conversions.

version 2.3.0 released!

- Added Check for Update function,
- Added the Command Line mode
- Amended the interpolation method used in IGLD85/Gravity model
- Minor bug fixes and error checking.

VDatum version 2.2.7 Released!

- Fixed the ArrayIndexOutOfBounds error in the biquadratic interpolation method.

VDatum version 2.2.6 Released!

- Fixed the floating point precision which made the program unable to recognize the grid null values (-88.8888).

VDatum version 2.2.5 Released!

- Added the GEOID09 model.
- Fixed OS separator for working in different OS environments.
- Changed transformation grid format from Double type to Float type to reduced the data size for faster downloading.

VDatum version 2.2.4 Released!

VDatum version 2.2.3 Released!

- Added GEOID06 model: supporting elevation conversions in Alaska with the newest Geoid transformation grids.

VDatum version 2.1.3 Released!

- Added transformation filters for conversion from tidal datums to IGLD85 and vice versa. The conversions between tidal datums and IGLD85 are prohibited.

VDatum version 2.1.2 Released!

- Fixed sign problem with sounding data

VDatum version 2.1.1 Released

- Added HPGN transformation grids which supporting horizontal transformation from NAD 27 to NAD 83(HARN).
- Fixed problem with IGLD85 grids.
- Fixed problem with 3-D transformation based on HPGN v2.9 model. Input and output time are set to January 1st of the current year.
- Minor tweaks and GUI improvements.

VDatum version 2.0.0 Release!

VDatum 2.0.0 has been released. This version contains significant enhancements and new features, including a new user-friendly interface and productivity features.