Web Results

North American Datum


The North American Datum (NAD) is the datum now used to define the geodetic network in North America. A datum is a formal description of the shape of the ...

Geodetic Datums: NAD 27, NAD 83 and WGS84 - GIS Geography


The result of triangulation from the unified network of survey monuments was North American Datum of 1927 (NAD 27) and later the more accurate NAD 83, ...

Datums and Transformations - Office of Coast Survey


The North American Datum of 1927 (NAD27) is an example of a local horizontal datum. It uses the Clarke spheroid of 1866 with an origin located on the surface ...

North American Horizontal Datums - APSG

www.apsg.info/Resources/Chapters/US West/2013.01.18_USWest_Jan_Van_Sickle_NorthAmericanHorizontalDatums.pdf

though the Clarke 1866 ellipsoid fits North America very well, it does not conform perfectly. As the ... establishment of the North American Datum 1927(NAD27).

Difference Between NAD 27 and NAD 83 | Difference Between


NAD 27 vs NAD 83 The North American Datum, or NAD, is the official geodetic datum that is prevalent in North America. There are two kinds of datum used in.

Geographic Coordinate System Definitions - FGDL


There are two phases of the North American Datum - NAD27 and NAD83 - one local the other geocentric. Local datum align a spheroid to closely fit the earth's ...

Coordinate Conversion & Identification


Datum conversions between all realizations of NAD27, NAD83, and WGS84 are not ... Terrestrial Reference Frame of 2000 and North American Datum of 1983".

Map Datum | Natural Resources Canada


Aug 25, 2016 ... Natural Resources Canada (NRCan) uses the North American Datum 1983 ( NAD83) as its geodetic reference system. As a map user, this is ...

North American datums—Help | ArcGIS for Desktop


The North American Datum of 1983 is based on both earth and satellite observations, using the Geodetic Reference System (GRS) 1980 spheroid. The origin for ...

Update and Refinement of the North American Datum of 1983


Jun 30, 2012 ... North American Datum of 1983. Dave Doyle. NGS Chief Geodetic Surveyor dave. doyle@noaa.gov. CGSIC. Nashville, TN. September 17, 2012.

More Info

National Geodetic Survey - Frequently Asked Questions FAQ


Jan 13, 2016 ... The North American Datum of 1927 (NAD 27) is "The horizontal control datum for the United States that (was) defined by (a) location and ...

NADCON - North American Datum Conversion Utility


May 25, 2011 ... The readjustment of the North American Datum of 1927 (NAD 27), Old Hawaiian Datum and Puerto Rico Datum to the North American Datum of ...

North American Datum 1983 (NAD83) - Knowledge Base English ...


Jul 12, 2016 ... The North American Datum 1983 (NAD83) is a geocentric datum that was established in 1986 for the United States, Canada, Mexico, Central ...