Nad83 coordinates. Requires use of the NGS Bluebook format for input.

Nad83 coordinates. gov Ready. There is no direct mathematical method to accurately transform coordinates from one Jun 16, 2025 · For faster processing, uncheck the coordinates you don't need in the output;"N/A" is filled in for an unchecked coordinate Upload Format: A comma-delimited text file with the following data elements; only '. text', or '. NGS will use published transformation methods to transform each station’s coordinates from the assumed stationary-based NAD83 datum to the dynamic, plate tectonic-based ITRF by adding a velocity vector component to the coordinates. (CRS code 4437). Engineering survey, topographic mapping. Dec 2, 2020 · U. I would also like to note that there is a difference in being geodetically correct and making things work. . e. EPSG:2230 Projected coordinate system for United States (USA) - California - counties Imperial; Orange; Riverside; San Diego. But if Survey123 could transform from WGS84 to NAD83 I think This tool permits the user to convert latitude and longitude between decimal degrees and degrees, minutes, and seconds. Provides latitude and longitude and some height information using the reference ellipsoid GRS80. NAD27 coordinates are typically converted to UTM using the Clarke 1866 ellipsoid as one of the parameters, while NAD83 coordinates use the GRS80 ellipsoid. '' These two widely distributed publications provided the surveying Question: What is the difference between the WGS84 and NAD83 datums? If I create a map using the WGS84 datum, can I label the map as both WGS84 and NAD83? Or, does it depend on what scale the map is in? I thought I heard that they are no longer interchangeable, but I recently saw a map labeled as WGS84/NAD83 for its horizontal datum. For convenience, a link is included to the National Geodetic Survey's NADCON program, which allows conversions between the NAD83 / WGS84 coordinate system and the older NAD27 coordinate system. United States (USA) onshore and offshore - Alabama; Alaska; Arizona; Arkansas Apr 30, 2012 · 23. '' These two widely distributed publications provided the surveying Jul 12, 2018 · History: NGS defined NAD 83 to replace the North American Datum of 1927 (NAD 27) because many survey observations had been completed since the 1930s including thousands of accurate Electronic Distance Measuring Instrument (EDMI) base lines, hundreds of additional points with astronomic coordinates and azimuths, and hundreds of Doppler satellite The readjustment of the North American Datum of 1927 (NAD 27), Old Hawaiian Datum and Puerto Rico Datum to the North American Datum of 1983 (NAD 83 (1986)) in July 1986 was both a change in reference ellipsoid and a “clean up” of nearly 200 years of surveying data held by NGS. Jul 24, 2020 · EPSG:4617 Geodetic coordinate system for Canada - onshore and offshore - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. Apr 21, 2014 · U. For applications with an accuracy of better than 3 feet, replaced by NAD83(HARN) / SPCS. The geodetic coordinate system for NAD 83 is based on longitude defined as angular distance East or West of the prime meridian, which runs through the observatory at Greenwich, England, and latitude defined as the angular distance north of the Equator. NAD83 (1986) is the original realization of NAD83, which is practically identical to the original WGS84. Position the point of interest (POI) in the center of the view. Use NADCON (North American Datum Conversion) to convert latitude and longitude from NAD 27 to NAD 83 or from NAD 83 to NAD 27. 2 to 1. Natural Resources Canada (NRCan) uses the North American Datum 1983 (NAD83) as its geodetic reference system. To get NAD27 coordinates when using a GPS device, the coordinates should be read in NAD83 and converted to NAD27 with the NADCON program. The old coordinates were not wrong, just different. NAD 83(2011) and any subsequent realizations. Geographical Sep 10, 2025 · Explore the State Plane Coordinate System zones for the 1983 North American Datum in the USA using this ArcGIS map viewer. Find the NADCON software, datum shifts, and other resources from the National Geodetic Survey. Convert your coordinates from NAD83 to WGS84 format quickly and accurately with this online tool. Converts NAD 27 State Plane Coordinates to NAD 27 geographic positions (latitudes and longitudes) and vice versa. NADCON also transforms between the original implementation of NAD 83, labeled NAD83 (1986), and the statewide High Precision Geodetic Network (HPGN The most famous is the National Geodetic Survey's NADCON, which can convert between NAD27 latitude/longitude and NAD83 latitude/longitude. As a map user, this is something you need to know, especially if you use GPS receivers, because it will modify the coordinates you will use Convert any coordinate format or datum with ExpertGPS ExpertGPS isn't just a mapping tool and a GPS data manager, it's a powerful coordinate converter that can instantly convert between any coordinate format or datum. The UTM NAD83 projection uses the GRS80 ellipsoid and a center-of-the-earth anchor point as its datum, both of which are slightly different than the WGS datum. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) Zones for the 1983 North American Datum within United States. The GPS device should not be set to read NAD27 because the internal conversion is not as accurate as the program. "-105. Answer: There are a number of Jul 24, 2018 · The HARN ushered us into an age where we were concerned with latitude, longitude, and focused us on precise ellipsoid heights and the advent of fixed height poles. EPSG:3081 Projected coordinate system for United States (USA) - Texas. io: Coordinate systems worldwide (EPSG/ESRI), preview location on a map, get transformation, WKT, OGC GML, Proj. Whether you need to convert lat/lon coordinates to UTM or US state plane coordinates, convert NAD27 data to NAD83 or WGS84 datum, or reproject shapefile data to match the native How to transform data from NAD83 to WGS84 Many US Government sources including the Census Bureau (TIGER), USGS (GNIS and NHD), and USDA publish GIS data files using the NAD83 coordinate system. Replaces NAD83(NSRS2007) / UTM zone 18N. OSM uses the WGS84 coordinate system, so if you have ever tried to open one of these files in JOSM, you've seen this message: In effect, the GPS-user is trying to convert the positional coordinates that the receiver outputs or the manufacture proprietary software gives from one particular frame into the other. Forms the basis of coordinates of all horizontal positions for Canada and the United States. Mathematically, NAD 83 is a stronger datum because all previously existing horizontal stations and newer GPS surveyed stations were adjusted EPSG:4437 Projected coordinate system for Puerto Rico and US Virgin Islands - onshore. Computations may be performed for a specific geographical location or for a file of input points. For applications with an accuracy of better than 3 feet EPSG:6347 Projected coordinate system for United States (USA) - between 78°W and 72°W onshore and offshore - Connecticut; Delaware; Maryland; Massachusetts; New Hampshire; New Jersey; New York; North Carolina; Pennsylvania; Virginia; Vermont. North American Datum of 1983 (NAD83) The North American Datum of 1983 (NAD83) uses thousands of survey monuments and triangulation to create a reference frame for Earth. Unlike the NAD83 coordinate system which is referenced from Latitude 0. In effect, the GPS-user istrying to convert the positional coordinates that the receiver outputs or the manufacture proprietary software gives from one particular frame into the other. There are two kinds of datum used in North America, namely, the North American Datum of 1927 (NAD 27) and the North American Datum of 1983 (NAD 83). Datum transformations correct your data from one datum to another. 224079, -98. In the process of transitioning from NAD27 to NAD83, the NGS revised the parameters defining the origin of the North and South zones so that obvious and discernibly different coordinates for the same position would result between the two datums. May 23, 2024 · NAD83 is a geodetic datum that standardizes geospatial referencing across North America using satellite technology. Based on this readjustment and redefinition, positions of points can change between 10 – 100 meters, in the The North American Datum (NAD) is the horizontal datum now used to define the geodetic network in North America. 0 meter relative to the original NAD 83 (1986) adjustment. United States (USA) - Connecticut; Delaware; Maryland; Massachusetts; New Hampshire; New Jersey; New York; North Carolina; Pennsylvania; Virginia; Vermont. Users can select different grids by clicking on the "select grid" link below. , it is recommended that they minimally include the current realization of NAD 83, i. The government's NADCON program, which converts NAD27/NAD83 coordinates, is the recommended way of doing that conversion. The California SPCS has 6 zones in NAD83 and 7 zones in NAD27, with Los Angeles County as the unique Zone 7 in NAD27 (it is Zone 5 in NAD83). Jul 12, 2018 · National Geodetic Survey Datums, Frames and Projections information covering vertical datums, horizontal and geometric datums, new datums, datum transformations, coordinate conversions and tidal datums The result was a new realization of the NAD 83 horizontal datum NAD 83 (2011). MnDOT's MnCon program contains the NADCON functionality. Their origin, axes orientation in space, and the unit of scale differ The North American Datum of 1983 (NAD 83) and North American Vertical Datum of 1988 (NAVD 88), although still the official horizontal and vertical datums of the NSRS, have been identified as having shortcomings that are best addressed through defining new horizontal and vertical datums. Pre-GPS, both datums were designed and published before satellites were routinely used to determine earth shape and position, such as latitude and longitude. For my purpose I'd like to have geographic coordinates DD in NAD83. 0 and Longitude 0. What stations will NOT be included in Mar 27, 2015 · It turns out that both NAD83 and WGS84 are 3D coordinate systems and the conversion between them happens along all three axes. Federal definition is metric - see code 26943. g. In the U. Jun 16, 2025 · NCAT is a web-based tool that allows you to convert or transform coordinates between different horizontal and vertical reference frames. A user account is not needed for the features on this web page. For more information about the state plane system, Wikipedia has an article. Canada - Nunavut; Ontario; Quebec. Their origin, axes orientation in space, and the unit of scale differ In 1992, NADCON capability was expanded to include transformations of latitude and longitude coordinate values between NAD 83 (1986) (includes post NAD 83 adjustments) and state May 25, 2019 · Yes Dan, NAD83 is a datum. Compute a datum shift for a specific location: NAD27 and NAD83 may differ in tens of meters for horizontal accuracy on location. gov Information Quality Site Map Contact Us Transformations from NAD27 to NAD83 Nevertheless, various approximate methods are used to transform NAD27 coordinates into NAD83 values. From 2001 replaced by NAD83 / Texas Centric Mapping System (TCMS/LC and TCMS/AEA). First of all, one should understand that the 3-D Cartesian frames to which the coordinates of the NAD83 and WGS84 refer are not identical. Will a transformation be available to convert coordinates between the three NAD 83 reference frames fixed to the North American, Pacific, and Mariana tectonic plates? 25. Mathematically, NAD 83 is a stronger datum because all previously existing horizontal stations and newer GPS surveyed stations were adjusted simultaneously Convert to NAD83 converts coordinates to NAD83 system. NAD83 has geodetic coordinates that measure 70 to 100 m different from those of NAD27. Jul 1, 2025 · This beta version of NCAT supports beta State Plane Coordinate System of 2022 (SPCS2022) but not transformations between reference frames or geopotential datums. Coordinate values (units of measure) are in meters or survey feet in NAD83 and survey feet in NAD27. You can select NAD83 (2011) as the input and output datum for lat-lon, SPC, UTM, USNG or XYZ coordinates. Please note that there have been “double-correction” issues in the Aug 10, 2023 · Good afternoon and thanks in advance for your help! I have a few questions about the transformation options that show up in the list in both ArcMap and Pro. LON/LAT UTM converterstreet map image topo State Plane Coordinate System - Convert, View on Google Earth. , most people don’t work with either NAD83 or WGS84 in the vertical. Data Frame: projected state plane coordinate system that uses the NAD 1983 2011 datum The Data: projected state plane "vanilla" NAD 1983 I have Sep 20, 2012 · Why a new NAD 83 realization? Previous NAD 83(CORS96) needed many improvements NSRS improvements achieved with the MYCS include: Consistent coordinates and velocities from combined solution Aligned with most recent realization of global frame (IGS08) IGS08 epoch 2005. io/ made by @klokantech The most frequently used item in the NGS Geodetic Toolkit is the North American Datum Conversion (NADCON) tool. ADSZONE NUMBERS APPLY TO BOTH NAD27 AND NAD83 SYSTEMS, EXCEPT FOR MONTANA, NEBRASKA AND SOUTH CAROLINA WHICH LACK REFERENCE FOR THE NEW ZONES CREATED FOR NAD83 Converts NAD 27 State Plane Coordinates to NAD 27 geographic positions (latitudes and longitudes) and vice versa. Includes all versions of NAD83(CSRS) from v2 [CSRS98] onwards without specific identification. from NAD 27 to NAD 83, or visa-versa, then the datum shift, in meters, is shown under the coordinates. NAD83 is a static datum, meaning that coordinates are fixed. Jul 12, 2018 · North American Datum of 1983 The North American Datum of 1983 (NAD 83) is the horizontal and geometric control datum for the United States, Canada, Mexico, and Central America. NAD83, Datums, and Geoid Models FAQ: Introduction I would like to start off this FAQ by thanking everyone who attended our webinar. Learn how it works, its limitations and its use cases for various applications. In 1990, Natural Resources Canada officially adopted North American Datum 1983 (NAD83) as its new geodetic reference system. Implications NAD 83 coordinates based on the HPGN/HARN surveys changed approximately 0. txt', '. National Geodetic Survey (NGS) publishes coordinates in NAD 83(NSRS2007) and will later in both NAD 83(NSRS2007) and ITRF. com Learn the procedures and methods to convert geographic coordinates to the North American Datum of 1983 (NAD83) for wireless licensing purposes. The x value may be called easting and the y value may be called northing. I wonder if Survey123 has the capability to transform the GPS coordinates from WGS84 to NAD83. It is part of a nationwide system developed in the 1930s and originally was based on the North American Datum 1927 (NAD 27), where the coordinates are based on the foot. The NAD 27 System has since been superseded by the NAD EPSG. Canada - Northwest Territories; Nunavut; Saskatchewan. For accuracies better than 1m replaced by NAD83(CSRS) / UTM zone Jul 28, 2015 · For agencies, groups, proprietary geospatial software providers, etc. State-wide spatial data management. NGS_DescriptionNOS Home Privacy Feedback Disclaimer USA. I know that GPS uses WGS84 datum so Survey123 can display coordinates with different coordinate systems like DD, DMS and UTM, all being in WGS84. For accuracies better than 1m replaced by NAD83(CSRS) / UTM zone 13N in Canada and Dec 21, 2015 · UTM NAD83 is a projected coordinate system that represents physical locations abstracted to a flat, cartesian coordinate system. It had its legal definition in terms of a specified map projection, an arbitrary reference Map Datums An incorrect datum, can put you hundreds of meters from your actual position The datum you have setup in your GPS receiver must match the datum used to create the map you are using. Both NAD83-to-NAD27 and NAD27-to-NAD83 coordinate conversions are supported. 4. If NAD 83 ellipsoid heights are The Maryland Coordinate System A second result of adopting NAD83 was that all states also adopted new State coordinate systems that were based on NAD83 instead of NAD27. Sep 30, 2025 · Convert any GPS coordinate format or datum from NAD83 to : lat/lon, UTM, state plane coordinates, BNG, USNG, etc. NAD83 (North American Datum 1983) is a geographic coordinate system (geographic reference system) widely used in North America, especially in the United States, Canada, and Mexico. In surveying, cartography, and land-use planning, two North American Datums are in use for making lateral or "horizontal" measurements: the North American Datum of 1927 Converts NAD 27 State Plane Coordinates to NAD 27 geographic positions (latitudes and longitudes) and vice versa. However, because earth’s tectonic plates are constantly moving, changing location values render these fixed coordinates Sep 17, 2019 · EPSG:6318 Geodetic coordinate system for Puerto Rico - onshore and offshore. NADCON transforms geographic coordinates between the NAD 27, Old Hawaiian, Puerto Rico, or Alaska Island datums and the NAD 83 system. I have aerial photos that I am trying to compute lat long coordinates for as closely as possible. Federal definition is metric - see code 26946. Learn about its history, applications, and how it differs from other datums like NAD27 and WGS84. (CRS code 6307) and NAD83 (NSRS2007) / Puerto Rico and Virgin Is. The three common datums in use in the Continental United States are: NAD 27 CONUS - North American Datum of 1927 for the Continental United States (Common on older USGS maps) NAD 83 – North American The California State Plane Coordinate System is used for defining and stating positions or locations of points on the surface of the earth within the State of California. Therefore, even NOTE: FIPSZONE NUMBERS ARE APPROPRIATE FOR BOTH NAD27 AND NAD83, UNLESS NOTED OTHERWISE. A datum is a formal description of the shape of the Earth along with an "anchor" point for the coordinate system. This reference frame allows surveyors, geodesists, and cartographers to accurately map out locations on Earth with latitude and longitude locations. 12345". The two horizontal datums used almost exclusively in North America are North American Datum (NAD) 1927 and NAD 1983. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the 1983 North American Datum in the United States. View a map of the entire SPCS and a map depicting SPCS 83 legislation and foot version. preparing to include the InGCS in their respective geodetic parameter datasets, coordinate system libraries, etc. Jun 16, 2025 · Customize Export If you don't see your desired datum in the above list, it might be because the datum or datum realization is part of the NAD 83 (HARN) or NAD 83 (FBN) groups within CONUS. United States (USA) onshore and offshore - Alabama; Alaska; Arizona; Arkansas; California Jan 29, 2020 · API for NGS’s Coordinate Conversion and Transformation Tool (NCAT) NGS Coordinate Conversion and Transformation Tool (NCAT) allows users to easily convert between different coordinate systems and/or transform between different reference frames and/or datums, in a single step. ArcGIS ArcGIS Help for TRX TRX is a coordinate transformation tool that allows you to: Transform between the North American Datum of 1983 of the Canadian Spatial Reference System (NAD83 (CSRS)) and the International Terrestrial Reference Frame (ITRF) realizations; Convert coordinates between geographic, Cartesian, and mapping projections (UTM, MTM, stereographic, and Lambert conformal conic); and Transform Online tool to convert UTM to geographic coordinates and vice versa, or to transform the datum between WGS84/NAD83 and NAD27 NGS_DescriptionBelow are maps of both the 1927 and 1983 versions of SPCS (select each one to get a higher resolution version). Why not just provide NAD 83 (2011) coordinates everywhere, regardless of the tectonic plate where the stations are located? 24. The North American Datum of 1983 corrected some of the distortions in the Jul 12, 2018 · National Geodetic Survey Datums, Frames and Projections information covering vertical datums, horizontal and geometric datums, new datums, datum transformations, coordinate conversions and tidal datums Apr 21, 2014 · U. NAD27 coordinates are presently used for broadcast authorizations and applications EPSG:26913 Projected coordinate system for North America - between 108°W and 102°W - onshore and offshore. For coordinate conversion, NCAT allows conversion between lat/long/height, SPC, UTM, XYZ, and USNG systems. Jun 3, 2024 · Learn about the different reference datums for surveying and mapping including NAD83, WGS84, and ITRF 2014. EPSG:2227 Projected coordinate system for United States (USA) - California - counties Alameda; Calaveras; Contra Costa; Madera; Marin; Mariposa; Merced; Mono; San Francisco; San Joaquin; San Mateo; Santa Clara; Santa Cruz; Stanislaus; Tuolumne. NAD 83 was released in 1986. 235, "The State coordinate systems," and replaces Coast and Geodetic Survey Publication 62-4, "State plane coordinates by automatic data processing. specify input coordinate type: decimal degrees (dd. As such it has an accuracy of approximately This is a newbie question that is about converting between wgs84 and nad83. NCAT Jul 28, 2011 · NAD 27 vs NAD 83 The North American Datum, or NAD, is the official geodetic datum that is prevalent in North America. csv' extensions are accepted Upload data to be converted Results are ready for download after a "Done" message appears May 20, 2025 · NAD 83 (North American Datum of 1983) is a unified horizontal or geometric datum and successor to NAD 27 providing a spatial reference for Canada and the United States. As a map user, this is something you need to know, especially if you use GPS receivers, because it will modify the coordinates you will use to position yourself on the map. NADGE is a graphical front end for the NGS online tool, NADCON, that facilitates the entry of geodetic coordinates and displays the converted coordinates and datum shift in a placemark balloon. 541808). The original coordinates can be in the system: UTM, GPS / WGS84, NAD83, and other popular systems. EPSG:4269 Geodetic coordinate system for North America - onshore and offshore: Canada - Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Northwest Territories; Nova Scotia; Nunavut; Ontario; Prince Edward Island; Quebec; Saskatchewan; Yukon. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the North American Datum of 1983 in the United States. S. If the inputs and outputs for a datum conversion are in state plane coordinates, then the state plane coordinate shift, in feet, is shown after the datum shift. Replaces NAD27 / UTM zone 13N. Positions obtained using the North American Datums of 1927 (NAD 27) and 1983 (NAD 83) are based on different earth shapes--or ellipsoids--and used the best technology available at the time. GSB format) where available. The transition to NAD83 An important change has been made in National Topographic System (NTS) maps. State-by-state adjustments were completed in the 1990s, an effort referred to as the High Accuracy Reference Network (HARN). WGS84 Datum. 0) Elevations and Elevation Profiles Single Point Single Point Single Datum with map NAD27 State Plane to NAD27 Lon/Lat NAD27 State Plane to NAD83 Lon/Lat with map Lon/Lat NAD27 to NAD83 with map WGS84 to OSGB36 Lon/Lat Model Viewers 3D Point Clouds 3D Solid Models 3D Solid w/4 Views About Conversions About Conversions Common Issues Report Bug or Sep 17, 2019 · EPSG:6781 Geocentric coordinate system for Puerto Rico - onshore and offshore. WGS84 results EPSG:26918 Projected coordinate system for North America - between 78°W and 72°W - onshore and offshore. The NAD 27 coordinate system (North American Datum 1927) is a geodetic coordinate system based on the Clarke Ellipsoid of 1866. The EPSG registry database consists of over 1000 entries. https://EPSG. Replaces NAD83(HARN) / SPCS (CRS code 2866). Replaces NAD83 (CORS96) / Puerto Rico and Virgin Is. State law defines system in US survey feet. 0 (previous aligned at epoch 1997. This page converts United States State Plane coordinates to other coordinate systems. Topo Map Datum - HelpMap Datum The transition to NAD83 An important change has been made in National Topographic System (NTS) maps. Historical Helmert transformation parameters that NGS has used to transform between ITRFxx and NAD83 reference frames. ddddd) UTM coordinates Rationale specify input datum: WGS84 NAD27 CONUS Reset Values latitude longitude *** OR *** UTM northing UTM easting zone Southern Hemisphere? For the Western Hemisphere longitudes are preceeded by a minus sign, e. - To Output File - The "To Output File" option sends an abbreviated output The NTv2 tool transforms coordinates (geographic, UTM/MTM/Stereographic/Lambert conformal conic) between the NAD27, ATS77, NAD83 (Original), and NAD83 (CSRS) reference systems using binary Grid Shift Files (. NAD83 was established by first performing a least squares adjustment of all the observations used to establish the NAD27 network and then redefining the mathematical reference surface from Clarke’s Spheroid to the GRS80. Optionally, you can select the system by entering the EPSG code. Typically three coordinate systems are utilized in West Virginia: Geographic (Latitude/Longitude) for general referencing and data distribution Universal Transverse Mercator (UTM) for statewide GIS data sets State Plane Coordinate System (SPCS) for countywide data sets File name extensions reflect the type of coordinate system. Replaces NAD27 / Shackleford. Information about how coordinates are referenced to NAD 83 (2011) can be found at the National Oceanic and Atmospheric Administration (NOAA), Continuously Operating Reference Station (CORS) Coordinates webpage. It supplements Coast and Geodetic Survey Special Publication No. United States (USA) - Colorado; Montana; Nebraska; New Mexico; North Dakota; Oklahoma; South Dakota; Texas; Wyoming. EPSG:6566 Projected coordinate system for Puerto Rico and US Virgin Islands - onshore. Requires use of the NGS Bluebook format for input. PREFACE This manual explains how to perform computations on the State Plane Coordinate System of 1983 (SPCS 83). For the Southern Hemisphere latitudes are preceeded by a minus sign. 0, the NAD27 system originates at Meades Ranch in Kansas (39. The original Maryland Coordinate System was adopted by authority of Chapter 628 of the Acts of the Maryland General Assembly of 1939. Therefore, UTM coordinates also require information about the datum and ellipsoid to fully define the location represented by the coordinates. The difference between the current realization of WGS84 used by GPS and the original realization of WGS84 typically is on the order of 1 meter. See full list on gisgeography. Please check the list below, and if your desired datum is on the HARN or FBN list, please use NAD 83 (HARN) or NAD 83 (FBN). For example, the computation of a constant local translation is sometimes attempted using stations with coordinates in both systems as a guide. Thanks for any clarification. Positions obtained using the North American Datums of 1927 ( NAD 27) and 1983 ( NAD 83) are based on different earth shapes--or ellipsoids--and used the best technology available at the time. NAD 83 latitude and longitude can be used as input, but the output coordinates will differ horizontally from actual SPCS2022 by up to a few meters, depending on location (likewise for UTM and USNG). Replaces NAD27 / UTM zone 18N. mts9ncm 0wrcc c6mxww 5ea 0j64 uv fpdudq uf6swwiqw iux eh