In Arab region, there are several Local Vertical Datums (LVD). Most of these datums
are based on averaging sea level measurements of a single Tide Gauge (TG) or from
multiple TGs.
One of the main reasons which negatively affecting the huge regional projects between
Arab countries as transportation lines, Petroleum Pipelines, electricity, and other
projects which require heights, is the difference in SST at tide gauge sites and
differences in measuring techniques. Therefore the Precise geoid determination is
considered an important step in eliminating these differences as it represents the base
for determination the regional geoid model. This study focuses on presenting two
proposals for unification the vertical datum in Arab region and the proposed
implementation strategy. Review of available data from previous studies. Provide the
best techniques to update, tie, and unify the data in all Arab countries, commensurate
with the modern technological development.