Version |
Date |
Download |
Amendments |
4 |
November 2010 |
Published with changes to layout as OGP Guidance Note |
|
3 |
June 2007 |
|
Corrected sign errors in transformations and modified transformation presentation format to reduce transformation direction confusion |
2 |
November 2006 |
|
Added JECA Campeche transformations and accuracy assessments to early transformations |
| 1 |
March 2006 |
|
Initial publication by the Americas Petroleum Survey Group (APSG) |