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**Submit Datum Transformation Parameters **

## NATO Geodesy and Geophysics Working Group

You may submit datum transformation parameters and supporting information by

1. ** mail: ** NGA (see data requirements below)

Office of Geomatics, L-41

3838 Vogel Rd

Arnold, MO 63010-6238

2. **email: ** coordsys@nga.mil (see data requirements below)

3. **electronic form:** FORM

Upon approval, the new transformation parameters will be made available by NGA. When possible provide the following information with the parameters. Control data will not be made available on the Internet.

**a. Datum transformation method (e.g., Helmert solution, Abridged or Standard Molodenski solution, or Multiple Regression Equations)**

**b. A list of the control stations used to compute the transformation parameters. As a minimum the following information should be included for each station:**

** 1) Station number/identifier**

** 2) Local datum latitude, longitude, “mean sea level” or ellipsoidal height (if used), and accuracy estimates. Accuracy**

** estimates are preferred but not required.**

** 3) WGS 84 latitude, longitude, ellipsoidal height, and accuracy estimates. Accuracy estimates are preferred but not required.**

**c. A brief description of the method used to compute the transformation parameters. The treatment of heights in the computation must be included in the description. When similarity transformation parameters are provided, the sign convention for the rotational parameters must be clearly stated.**

**d. Include the source (e.g., organization name) of the local control and a brief description of how the coordinates and their accuracy estimates were computed.**

**e. Include the source of the WGS 84 control and a brief description of how the coordinates and their accuracy estimates were computed.**

**f. Include boundary coordinates or other unambiguous identification (e.g., country name(s)) of the region for which the transformation parameters are valid.**

**Point of Contact:**Coordinate Systems Analysis Team

phone (314) 676-9124, DSN 846-9124

coordsys@nga.mil

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