Table of Contents

## What is NAD83 UTM?

UTM NAD83 is a projected coordinate system that represents physical locations abstracted to a flat, cartesian coordinate system. 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.

## How do I find my UTM zone?

So for example, the UTM zone number for 39° W would be found through these steps: -39 + 180 = 141. 141 / 6 = 23.5. 5 rounds up to 24….Option 1 – The Mathematic Approach

- Take your longitude coordinate in decimal degrees and add 180.
- Then divide by 6.
- Finally round-up to the next highest whole number.

## Which is better WGS84 or NAD83?

WGS84 has error less than 2cm from center of mass which is better than NAD83. 5. One other main difference between WGS84 and NAD83 is points over Northern American plate for NAD83 does not change whereas WGS84 is defined with respect to average of stations all over the world. 6.

## Is NAD83 an ellipsoid?

The North American 1983 datum (NAD83) uses the Geodetic Reference System (GRS80) ellipsoid while the World Geodetic System of 1984 (WGS84) uses the WGS 84 ellipsoid. The dimensions of these ellipsoids differ slightly.

## Where is the Universal Transverse Mercator?

To find the UTM coordinate of a point, “read right up”. The numbers designating the vertical gridlines (at the bottom or the top of map) are the easting values. The numbers to the sides of the map labeling horizontal lines are the northing values. In the map example below, grid lines are 1000m apart.

## What UTM zone is the UK?

There isn’t a single UTM zone that neatly spans the UK from Belleek (8° 5′ W, Zone 29) to Lowestoft (1° 45′ E, Zone 31). Using unprojected WGS 84 kinda smears the islands out a bit. Your choice very much depends on your scale, your audience and whether distance or area need to be kept accurate.

## What is the difference between UTM and MTM?

MTM is similar to UTM (hence “modified”), in that it is based on the Transverse Mercator projection, and has north-south oriented zones with a central meridian at which distortion is minimized (http://what-when-how.com/gps/datums-coordinate-systems-and- map-projections-gps-part-2/).

## What ellipsoid does NAD83 use?

The North American 1983 datum (NAD83) uses the Geodetic Reference System (GRS80) ellipsoid while the World Geodetic System of 1984 (WGS84) uses the WGS 84 ellipsoid.

## What does NAD 1983 stand for?

U.S. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the 1983 North American Datum in the United States. U.S. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) zones for the 1983 North American Datum in the United States.

## What is the history of the NDNAD 83?

NAD 83 was released in 1986. State-by-state adjustments were completed in the 1990s, an effort referred to as the High Accuracy Reference Network (HARN). Since then, the increasing accuracy and availability of GPS has required two adjustments of the entire network.

## What type of NAD should I use for my survey?

Surveys in Hawaii or on the Pacific Plate should use NAD 83 (PA11), Epoch 2010.00. Territories on the Marianas Plate should use NAD 83 (MA11) Epoch 2010.00.