Geo-referencing in Tunisia everything you'll never learn at school
Positioning errors are numerous and are due to the preconceived idea that giving Lat/Long is giving a complete information, which in reality is not true. They are also due to the fact, that this discipline is only taught in a theoretical way by explaining the different types of projections that exist in the world, without ever talking about the reality on the ground in Tunisia. Based on examples of oil well positioning and errors found in final well reports , this document provides a complete and practical description of the projection systems used in Tunisia WHAT YOU NEED TO KNOW Tunisia has an official referencing system using the Carthage Datum. What lies behind the term "Datum" is essentially a system of angular coordinates and an ellipsoid defined by its dimensions. Carthage Datum simply means that we're talking about the Clarke 1880 IGN ellipsoid , which has the following characteristics: the dimension of the semi-major axis is 6378249.2m (this is the sa