Convert wgs84 to egm96. Jul 27, 2012 · Vertical Datums - NAVD 88 and EGM 96.

Convert wgs84 to egm96. 6 Comparison of EGM96, EGM 2008 N values with respect to ground N values for study area 2 338 J Indian Soc Remote Sens (June 2012) 40(2):335–340 respect to geoid and WGS84 datum. I have used Following code '''gdalwarp -overwrite in_dem. National Geospatial-Intelligence Agency Jun 29, 2011 · Precise terrain elevation information is required in various remote sensing and Engineering projects. Fine enough, but I need to go the other way; from WGS-84 to lat/long-format. transform call in order for everything to work correctly. The geoid undulations are relative to the WGS84 ellipsoid. 1984 (WGS 84) [11] [12] [13][14][15]. Choose the WGS84. GGM10 is a gravimetric geoid model for Mexico computed by the General Direction of Geography and Environment at the INEGI. js, you can test the result on the demo page. e. UTM zones use as a datum the WGS84 ellipsoid. Geoid undulations were evaluated directly on the geoid (rather than using an up/down procedure) for both EGM-X05 and EGM96, with the differences (EGM96 minus EGM-X05) shown in Figure 8 (95K), covering the range of 24-53 degrees North in latitude, and 230-294 degrees East in longitude. Summary (8 pages). Open kring opened this issue May 14, 2023 · 0 comments · May be fixed by #835. Geoscience Australia provides a range of web applications, documents and spreadsheets to help with coordinate transformations, conversions and ellipsoid computations. The geoid is an equipotential surface of the Earth s gravity field that is closely associated with the mean ocean surface. CAD Manager - Designer. The longitude origin of NAD 27 is the Greenwich Meridian with a south azimuth orientation. Jan 18, 2023 · WGS84 and Lambert 93 Well, WGS84 is a world geodetic system!So the data is not projected! It is a geodetic system with geocentric or geodetic coordinates based on the EGM96 geoid, the reference ellipsoid IAG GRS80, and the original meridian is the Greenwich meridian. Jul 27, 2012 · Vertical Datums - NAVD 88 and EGM 96. The model coefficients, and other products are available via anonymous FTP to cddisa. Oct 31, 2019 · This is the 2D geographic form of WGS84. The North American Datum of 1927. Versions. Then use the AusGeoid09 model to convert them to AHD. That was my contribution to the solution . La base de données du registre EPSG comprend plus de 1000 entrées. Do you know what I should do to convert the elevation data? Also, is there any python library that could help me with the conversion? EGM96 General Description. By default, Pix4Dmapper will generate the outputs in the UTM zone. The egm96 geoid undulation with respect to the WGS84 ellipsoid. GPS/BM constrained to help model Jun 7, 2023 · Geodetic transformations and conversions. Usually this will be a mime-type like image/jpeg or image/png; the supported formats will be available in the WMS capatilibies. I have this problem a weird vertical shift, it comes down to the use of EGM96 and WGS84 datums. N = He − Ho. However the usage of ellipsoidal heights, i. Derivation of gravity-related heights from GNSS observations. 5. The WGS 84 GPS systems we use have a geoid component as well. Subscribe. The present WGS 84 system uses the 1996 Earth Gravitational Model (EGM96) geoid and is the ellipsoid that best fits the geoid model for the selected survey points in the set. However, it doesn't line up with the shapfile which has the targeted system. Replaces WGS 84 to EGM84 height (1) (CT 15781). The new geoid has an average uncertainty of±0. EGM 96 is part of the WGS84 definition, so the geoid model u use when selecting WGS must be EGM96. tif outfile. . N = egm96geoid(lat,lon) returns the height in meters of the geoid at the specified latitude and longitude from the Earth Gravitational Model of 1996 (EGM96). These steps allow you to convert orthometric height to ellipsoidal. In geodesy, a reference ellipsoid is a mathematically defined surface that approximates the geoid, which is the truer EGM96 is a composite solution, consisting of: a combination solution to degree and order 70, a block diagonal solution from degree 71 to 359, and the quadrature solution at degree 360. The MSL, approximated by an ellipsoid, is related to gravity or the center of mass of the earth. I am not very familiar with WGS 1984 and EGM96 Global. tif were same no change occur in DEM elevation in out_dem. The current version, WGS 84, defines an Earth-centered, Earth-fixed coordinate system and a geodetic datum, and also describes the associated Earth Gravitational Model (EGM) and World Magnetic Model (WMM). Out of all these global geoidal undulation models, the EGM2008 model Oct 14, 2022 · WGS 84 and Navstar satellites are closely entangled, the primary coordinates in WGS 84 are ECEF-based. Usually the server will have a default, but you can override that here. 'EGM96' EGM96 Geopotential Model to degree and order 360. WGS84 Jun 7, 2012 · Convert elevation values from UTM-NAD27 to WGS84. Now the conversion makes more sense, and can be summarized as: One simpler way would be to use the GDAL command line tools: gdalwarp infile. Apr 9, 2020 · I have TanDEM-X 90m DEM with horizontal datum wgs84 and vertical datum in wgs84. Note: When relying only on the image geolocation (GCPs not used), using Geoid height is recommended for small areas where geoid and ellipsoid can be considered parallel in a small portion of terrain. Angular Unit: degree. How to convert DEM with vertical DATUM DHHN2016 height EPSG:7837 to EGM96 height - EPSG:5773? There is a lidar data source of digital elevation model of Germany. New Contributor. by GlennNead. I have georeferenced tiff files of 1:50,000 map sheets covering Belize, which include spot heights. GPS is the most widely used technology to obtain information due to its ease of operation. Discrepancies between a WGS84 ellipsoid, and the geoid vary with location. Future versions of NCAT may support WGS84. 1, see disclosure at end of answer). g. nasa. EGM96 15' geoid model WGS 84 (EPSG::4326) to EGM96 height (EPSG::5773), included with Agisoft Metashape degree and order 360. They can be used for computations of Jun 17, 2017 · GDAL can now do vertical CRS transforms using compond CRS. Oct 20, 2016 · WGS 84 is what all GPS systems are based on. 01 m for this model. The model is provided in a binary format. 2414. For smaller spacing (in principle more exact) see CT code 3859. wgs84. tif output. If I have records from all over the world then which NAD 83 do I use in place of WGS84? For now, you may use HTDP to transform WGS84 to NAD 83 first and use the transformed NAD 83 coordinates in NCAT. Jun 3, 2020 · I have used the C++ gdal library to read a raster image. An executable using spherical harmonics is also available. Topocentric coordinates are expressed in a Oct 28, 2012 · The usual way to set a geodetic system in Civil 3D is to right click the drawing name on the settings tab of the prospector and use the Units and Zone tab. The final version of our Tokyo proceedings paper is now available. img and click Add. hgt files. The present-day tidal elevations along the coastline are obtained from FES2014 , and its highest astronomical tide (HAT) data is referenced to Lowest Astronomical Tide (LAT), according to the reference : I added a few elevations for mountains in Dublin in wgs84 format. This represents N in the equation above. I think the ERA5 data is essentially a compound of 2 different projections, one horizontal and one vertical. So i assume its helmert. C++ implementation of essentially what I need. tif and out_dem. I took a nearby mountain with both values to work out the difference over local and wgs84 height. The documents and spreadsheets are a reference standard. 5 arc Feb 2, 2024 · The Australian Gravimetric Quasi-geoid (AGQG) is a gravity model that provides the offset between the GDA2020 ellipsoid and the Australian quasi-geoid. from publication: Creating Orthographically Rectified Satellite Multi-Spectral Imagery with High Resolution Digital Secondly, use the EGM96 geoid model to convert the GE values back to WGS84/ITRF ellipsoidal heights (h). This function calculates geoid heights to an accuracy of 0. WikiP on WGS84. WGS84/EGM08 data and FORTRAN implementation. 5-1. To support this claim two sets of metrics are provided: The 7-parameter transformations between the IGS GPS Precise Ephemerides and the NGA GPS Precise Ephemerides with the view that each is a reflection of their underlying reference frames. I would like to compare the accuracy of the SRTM 90m resolution DEM and the ASTER 30m resolution DEM for Belize, by comparing the elevation values against spot heights taken from maps of the country. Details. For example, WGS84 ellipsoid with EGM96 elevation can be specified like EPSG:4326+5773. [] To call WGS 84 simply an ellipsoid isn’t quite accurate. 2. The problem is that, the areas was flown using two drones, but one drone produces GPS log using EGM96 the other produces GPS log just using WGS84 datum, as a result when the data is processed the vertical shift is observed clearly in areas surveyed by one drone as comparison to areas May 20, 2021 · EGM96 is gravity-related vertical CS based of WGS84. EPSG3857 uses wgs84 for both ellipsoid and geodetic CRS however the ERA5 data uses wgs84 for ellipsoid while for the vertical uses EGM96. The Geoid height value is used to convert the image geolocation (WGS 84 ellipsoid or EGM96 geoid) into the desired project coordinate system. Unfortunately, it seems gdalwarp is usually used to convert from one SRID to another, not the use case I'm looking for. So, no conversion will be done with respect to the heights. Dec 10, 2021 · This video showing on how to convert WGS 84 geographic coordinate system to projected coordinate system in QGIS - step by step. Jan 17, 2023 · EPSG:3858 Transformation for World. Replaces WGS 84 to EGM96 height (1) (CT code 15781). PGM2000A is an EGM96 derivative model that incorporates normal equations for the dynamic ocean topography implied by the POCM4B ocean general circulation model. A concept for addressing hydrographic chart depth conversion based on GPS positioning of the chart datum (e. I understand that Google uses WGS84 with EGM96 Geoid. Convert geocentric coordinates to topocentric coordinates (in the forward path). Replaced by WGS 84 to EGM2008 height (1) and (2) (CTs 3858-59). MSP GEOTRANS can be downloaded to run as a stand-alone application. Aug 22, 2016 · Global and regional analysis of EGM96 compared with EGM2008 indicate that locally there are large differences distorting to the accuracy level of SRTM DEM. Created for the needs of civil aviation. Grid spacing is 2. I've seen references to converting NGVD 29 to NAVD 88 and from WGS84 ellipsoid to EGM96 geoid, but I do not see anything related to converting between NAVD 88 and EGM 96. 1 or ArcGIS Pro 2. I want to change vertical datum from WGS84 to EGM96. If you do so, you may indicate source:ele:wgs84=extrapolation. To transform the WGS84 altitued to an estimate for the altiude above mean sea level, the offset described by the Earth Gravitational Model 1996 (EGM96) [2] can be added to the WGS84 altitude. Feb 23, 2024 · The DEM dataset I use is CoastalDEM, whose vertical datum is EGM96. WGS 84 represents the best global geodetic reference system May 10, 2020 · Geoid heights can be used to convert between orthometric heights (approximately mean sea level) and ellipsoid heights according to the formula: h = H + N Where, h = WGS 84 Ellipsoid height H = Orthometric height N = EGM96 Geoid height Note that EGM96 applies only to the WGS 84 reference ellipsoid. WGS 84 represents the best global geodetic reference system Jul 12, 2010 · I'm trying to convert Google Earth elevations to NAVD88. It covers the region from 14° to 33° in latitudes and from 86° to 119° in west longitude, with a grid resolution of 2. We would like to show you a description here but the site won’t allow us. The EGM96 geoid defines the nominal sea level surface by means of a spherical harmonics series of degree 360. THE EGM96 GEOID UNDULATION WITH RESPECT TO THE WGS84 ELLIPSOID. Cartosat-1 = WGS84 ellipsoid with WGS84 elevation +proj=longlat +datum=WGS84 +no_def. The selection of the EGM96 geopotential model (50 pages). This function interpolates geoid heights from a 15-minute grid of point values in the tide-free system, using the EGM96 Geopotential Model to the degree and order 360. 2. EGM84 30' geoid model WGS 84 (EPSG::4326) to EGM84 height (EPSG::5798). Most GPS receivers convert the WGS84 ellipsoidal heights provided by global navigation satellites to EGM96 heights, so if you're unsure, accept the default of EGM96. See the example below for the conversion described above: Jun 17, 2005 · Chapter 10. Matlab function of exactly what I need. 0. I have the SRTM dataset from NASA downloaded and open in ArcGIS as . Converted from USA NGA data under Public Domain license. 1. There are many technologies to derive the terrain elevation information like GPS, ground surveys, LiDAR, Photogrammetry. MSP GEOTRANS is the NGA and DOD approved coordinate converter and datum translator. Oct 25, 2017 · It includes a geoid converter freeware: https: Convert XYZ file with WGS84 Ellipsoid elevations to EGM96 Geoid elevations. gov (cd to the directory pub/egm96/general_info/). [N,globalR] = egm96geoid returns geoid heights for the entire globe as a 721-by-1441 matrix spaced at 15-minute intervals with latitude limits Jun 1, 2012 · The EGM2008 model has been used in many research studies for converting wgs84 ellipsoidal heights to orthometric heights. In the absolute sense, the overall geoid differences throughout arc-degree tiles reach −5 m in the northeast and 2–3 m in the southern parts of Turkey. "Closely associated" can be defined in a number of ways [ Rapp, 1995]. EGM96 is a geopotential model of the Earth consisting of spherical harmonic coefficients complete to degree and order 360. It uses the EGM96 sample data file provided by the NGA to lookup reference mean sea level and performs bilinear interpolation on the result. Add a function to convert between WGS84 and EGM96/EGM2008 heights #637. Allen Jessup. tif The 7-parameter transformation from WGS 84-to-ITRF is zero in all components by design. --in wms_version string Jul 1, 2020 · I want to convert the elevation data obtained from Google elevation API to NAVD 88. Google Earth uses WGS84 EGM96 . Open N = geoidegm96(latitude,longitude) calculates the geoid height as determined from the EGM96 Geopotential Model. If we instead use EPSG:4979-- the 3D geographic form of WGS84 -- we see a difference: COORDINATE SYSTEM: Ellipsoidal 3D CS. Chapter 12. En option, vous pouvez sélectionner le système en entrant le code EPSG. --in format string: File format to return. Set it accordingly. gsfc. 14,185 GPS/levels bench marks (NAD83/NAVD88); more to be included to further improve future models. So now the conversion between the 2 is a matter of specifying the source and target srs. I used the Projected Coordinate System: WGS_1984_UTM_Zone_54N. UoM: degree, degree, metre. Choose Height Above Ellipsoid if your image heights are in reference to the ground, or if your project was flown with a real-time kinematic system (RTK). Learn more. The NAD 27 is a horizontal datum for the continental United States based on the Clarke ellipsoid of 1866 (Clarke 1866). The results is pasted as below. Geodetic transformations and conversions. Mar 5, 2012 · Geographic Coordinate System: WGS 84. Nov 6, 2016 · Hi All. The spec of the lidar data is: Horizontal CRS: EPSG 25832 Vertical DATUM: EPSG 7837 I have anther DEM whose vertical datum is elevation. RE: EGM96 datum to NAVD88 eea (Civil/Environmental) 21 Jul 10 16:42. But in_dem. So any EGM96 data should be combined with WGS84 geographic CS. Specifically I've read hgt and geotiffs at this point. Jan 17, 2023 · EPSG:10084 Transformation for World. Thus the user must be provided with a way to convert a position from ECEF to geodetic (latitude/longitude/height). (30 Aug '12, 14:41) Dafo43. For reversible alternative see CT code 9704. The geoid height above the ellipsoid (N) is the difference between the ellipsoidal height and orthometric (geoid) height. These models enable heights to be transformed between local vertical datums and WGS84. Axes: latitude, longitude, ellipsoidal height. A library to convert between EGM96-relative altitudes and WGS84 ellipsoid-relative altitudes. I am new to ArcGIS and geoids/ellipsoids, and I want to convert a dataset in EGM96 (the USGS SRTM DEMs) to NAVD88. Chapter 11. The WGS 84 EGM96 geoid was generated from the spherical harmonic model and WGS 84 parameters and is available as a 15' x 15' grid of geoid heights. This model uses a 15-minute grid of point values in the tide-free system. 0NASA/TP-1998-206861 (SECTION 11) 11. So basically I have this huge data file of a 1 minute grid of the earth providing the EGM (mean sea level) offset to the WGS84 ellipsoid. The default vertical datum for those file types is most often EGM96 geoid. WGS 84 represents the best global geodetic reference system Mar 1, 2024 · New in version 8. The model is valid for latitude and longitude coordinates between 8 (S) to 61 (S) and 93 (E) to 174 (E). Below is the command used for converting Cartosat-1 DEM to Oct 8, 2020 · Given a list of WGS84 latitude / longitude pairs in a text file (one pair per line), I'd like to compute the EGM96 and EGM2008 elevations corresponding to those points using GDAL. tif. egm96-universal. (6 pages). Fig. Mar 28, 2024 · WGS84 is not an option in the conversion tool. The deviations of the EGM96 geoid from the WGS 84 reference ellipsoid range from about −105 m to about +85 m. Before you will be able to transform your vertical data, you will need to move your data to WGS 1984 geographic coordinate system using (1) Project Raster tool and (2) Vertical Checkbox unchecked . , Mean Low Low Water) is also discussed. For reversible alternative see WGS 84 to WGS 84 + EGM96 height (1) (CT 9708). The fixed datum reference point is located at Meades Ranch, Kansas. 0 m worldwide compared to ±2-6 m for the original WGS 84 geoid. I have downloaded VDatum from NOAA, which lists the EGM96 geoid on its webpage, but when I try to use the tool there are no EGM geoids available to Jun 27, 2019 · To convert that height to MSL, I have seen on Internet Here or Here that require a geoid to compute the conversion from WGS84 point to MSL. The World Geodetic System ( WGS) is a standard used in cartography, geodesy, and satellite navigation including GPS. WGS 84 represents the best global geodetic reference system Mar 26, 2015 · To convert ellipsoidal height to mean sea level you need a geoid undulations model of the region you are working on. Prime Meridian: Greenwich. Latitude and longitude can be computed using an ellipsoidal model of Earth. 5 arc-minutes. Mar 6, 2018 · I am comparing two different Digital Elevation Models SRTM (Datum: EGM96) Cartosat (Datum: WGS84) How to convert WGS84 to EGM96 in ArcGIS Desktop? Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and A library to convert between EGM96-relative altitudes and WGS84 ellipsoid-relative altitudes. Are they synonymous? The World Geodetic System 1984 (WGS 84) is a 3-dimensional coordinate reference frame for establishing latitude, longitude and heights for navigation, positioning and targeting for the DoD, IC, NATO, International Hydrographic Office and the International Civil Aviation Organization. You may access HTDP from here egm96-universal. Jan 10, 2024 · You are telling gdal, that input data is in EPSG:9707 (WGS84 for horizontal coordinates, and EGM 96 for vertical coordinates) and the output should be generated in EPSG: 9518 (WGS84 for horizontal coordinates, and EGM 2008 for vertical coordinates) Add this new file to Qgis, and using the field calculator, Add the Z Values to a new column. 1. If you need to select a different vertical datum such as the NAVD88, then you May 22, 2014 · I am trying to find the correct transformation to convert a shapefile in WGS 1984, EGM96 Global into NAD 1983 UTM Zone 13N. Datum: World Geodetic System 1984. with respect to WGS84 has limited 1. May 31, 2014 · There are a lot of free tools out there to convert from UTM to Lat/Long. This operation converts geocentric coordinate values (X, Y, Z) to topocentric (E/East, N/North, U/Up) values. However as shown with the snippet above: when transforming datums from WGS84 to EGM96, it is the call with x=lon, y=lat that gives the correct output The World Geodetic System 1984 (WGS 84) is a 3-dimensional coordinate reference frame for establishing latitude, longitude and heights for navigation, positioning and targeting for the DoD, IC, NATO, International Hydrographic Office and the International Civil Aviation Organization. When selecting the image coordinate system, leave the Geoid Height Above the Ellipsoid to 0 (default value). WikiP on EGM96. Oct 26, 2019 · SRTM = WGS84 ellipsoid with EGM96 elevation +proj=longlat +datum=WGS84 +no_defs +geoidgrids=egm96_15. Here you can convert the most common coordinates into the other formats. In addition, you might also try converting from WGS84/ITRF lat/lon/h to GDA94 lat/lon/h to try to remove that 1 m offset. Because WGS84 has shifted over time, this geoid is best used in a relative fashion. It is a composite solution, consisting of: (1) a combination solution to degree and order 70; (2) a block diagonal solution from degree 71 to 359; and (3) the quadrature solution at degree 360. The World Geodetic System 1984 (WGS 84) is a 3-dimensional coordinate reference frame for establishing latitude, longitude and heights for navigation, positioning and targeting for the DoD, IC, NATO, International Hydrographic Office and the International Civil Aviation Organization. I need to be able to use the C/C++ gdal library to convert to height above the WGS84 ellipsoid to compare with the data from my GPS. Works both in the browser and node. 0. The GPS receiver uses a theoretical sea level estimated by a World Geodetic System (WGS84) ellipsoid, which does not perfectly follow the theoretical MSL. Les coordonnées d'origine peuvent être dans le système: UTM, GPS / WGS84, NAD83 et d'autres systèmes populaires. 'EGM2008' EGM2008 Geopotential Model to degree and order 2159. Re: Coordinate conversion from ellipsoid to geoid. WGS 84 represents the best global geodetic reference system Convertir en WGS84 convertit les coordonnées en système WGS84. Click OK to close the Raster Functions Properties dialog box. . This is also sometimes known as the ECEF (Earth Centered Earth Fixed) to ENU conversion. After entering the values to be converted, either click on the calculator or confirm with the Enter key. The valid values for the respective system can be found by moving the mouse over the input examples. Hot Network Questions Spatial reference system of the data to retrieve. EGM96 is a spherical harmonic model of the Earth's gravitational potential complete to degree and order 360. WGS 84 represents the best global geodetic reference system Aug 24, 2021 · egm96-universal. Click OK to close the Mosaic Dataset Properties dialog box. Specify latitude and longitude in degrees. Feb 4, 2018 · To convert from NGVD29 to NAVD88 you'll need VERTCON or CORPSCON (or ArcGIS 10. Can I still use the NAD_183_To_WGS_1984_7 transformation (this is for Saskatchewan, Canada)? My projection is not defined when I bring it into ArcGIS 10. gtx. 07-27-2012 12:50 PM. Global Geoid Models. Once you NAVD88 elevations, you can use the GEOID12B geoid model to convert to NAD 1983 (2011) (or another re-adjustment) ellipsoid heights. Download scientific diagram | Convert terrain heights from EGM96 to WGS84. Check that and if it doesn't match the system you want. Depending on the required precision, you can use a global model like EGM2008 Oct 14, 2011 · GeographicLib includes classes to compute the geoid height via interpolation on a grid of values (the Geoid class) and via summing the spherical harmonic sum (the GravityModel class). Far from perfect but better than having no information I think. Click the Operation drop-down arrow and click Plus. tif -s_srs EPSG:4979 -t_srs EPSG:4326+5773'''. Jan 18, 2020 · For example, a project with horizontal coordinates based on the ellipsoid of WGS84 can have vertical coordinates based on the ellipsoid of WGS84 (see screenshot below) or one of the geoids (egm96 is the default option). The user-friendly GUI has features including batch conversion capability, a choice of precision levels, and the capability to add your own datum. tif out_dem. The model coefficients, and other products are available via anonymous FTP to cddis. This works in all directions and with all valid values. The same applies to any other coordinate system. But it's more complicated than that; 'couse I need the result to be in UTM-33 (nordic) zone. May 27, 2020 · 1. gdalwarp -s_srs <source compond srs> -t_srs <target compond srs> input. For this step, you could try HTDP (also from the National Geodetic May 11, 2020 · I would expect to always have to pass x=lat, y=lon in a Transformer. The paper has been published by Springer-Verlag, and the full reference is as follows: Nov 22, 2020 · I need to plot the data in a web map in Folium and projection needs to be EPSG3857 (pseudo mercator). Nov 29, 2002 · [10] To compare the obtained GPS coordinates with the predefined interest point, we have selected as reference the ellipsoid world geodetic system rev. tif -t_srs "+proj=longlat +ellps=WGS84" That can be invoked easily enough via scripting for batch jobs. Allen. Mexico. This plugin allows to calculate EGM96 and EGM2008 elevations in Poland based on KRON86 or EVRF2007 normal heights. • Compute and remove conversion surface from USGG2003 GEOID03 - best model for North America; not a true interpretation of the geoid but includes bias to establish best orthometric heights relative to NAVD88. Once you know the compond CRS definitions, gdalwarp can do the transform. Systematic differences between the EGM96 geoid and various national vertical datums were determined and modeled. Examples are wgs84 or EPSG:4326. Orientations: north, east, up. Helmert tranformation is the easiest way for 7-parameter transformation. Projected Coordinate System: WGS_1984_UTM_Zone_54N. Hope it helps. Welcome to the official webpage of the NASA and NIMA joint geopotential model, EGM96. is ny il ig lm ci me rj ge nv