WGS84 Vs NAD83

WGS84 Vs NAD83

GIS Grinder, today going to compose on contrasts somewhere in the range of WGS84 and NAD83. Both the coordinate system very somehow or another, I have listed 10 differences. These minor differences are significant for any GIS expert to know.

1. WGS84 (World Geodetic System of 1984) uses WGS84 ellipsoid whereas NAD83 (North American 1983 Datum) utilizes the Geodetic Reference System (GRS80) ellipsoid.

2. WGS84 has a 0.21mm longer ellipsoid than NAD83.

3. WGS84 is used all over the world whereas NAD83 is mostly used in the USA and Canada.

4. WGS84 has blunder under 2cm from the focus of mass which is better than NAD83.

5. One other main difference between WGS84 and NAD83 points over the Northern American plate for NAD83 doesn’t change though WGS84 is characterized as normal of stations everywhere throughout the world.

6. Revised WGS84 has a deviation of 105 m to +85 by the utilization of new EGM96 geoid which contrasts from the first WGS84. NAD83 has not changed.

7. NAD83 has 250,000 points everywhere throughout the USA and Canada that incorporates 600 satellite Doppler stations. WGS84 doesn’t have any physical coordinates.

8. WGS84 is used by the U.S. Department of Defense whereas NAD83 by the number of government agencies.

  1. Different Parameters for WGS84 vs NAD83

Coordinate system Name Ellipsoid       Semi-Major Axis    Semi-Minor Axis    Inverse of flattening

WGS84        WGS84        6378137       6356752.3142451793       298.25722356300003

NAD83         GRS80        6378137       6356752.3141403561       298.25722210100002

Difference in Value                   0        0.00010482  0.000001462

Note: There is a small difference in parameters for Semi-Minor Axis and Inverse of flattening which might be negligible during the survey.

10. WGS84 vs NAD83 North America Map

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salman khan

Written by worldofitech

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