|M.Sc Thesis||Department of Civil and Environmental Engineering|
|Supervisors:||Dr. Ron Adler|
|Prof. Doytsher Yerach|
The last few years saw the creation of an increasing number of digital databases, such as the Israel National Geographic Information System (NGIS). These databases are based on geodetic control, both GPS and traditional, and a variety of cartographic products are derived from them. The digital mapping refers to a well-defined plane rectangular coordinates system of the projection chosen.
Israel, like many other countries, currently uses the ITM (Israel Transverse Mercator) projection, with major geodetic control referred to the National Datum, including the GRS’80 ellipsoid. A 1.0000067 scale factor is applied to the central meridian in order to preserve the existing scale of the geodetic control network.
This research examines the various options of choosing the scale factor for a conformal projection for Israel in the future, including the UTM (Universal Transverse Mercator) used all over the world for military mapping. The aim is to achieve an optimal distribution of distortions caused by the projection.
Another research goal is to discuss the option of severing the physical connection between the national geodetic datum and the projection and the adoption of a worldwide datum, such as the WGS’84.
The research also examines the influence of the elevation of the ground on the scale of mapping.
The results of the research provide a basis for consideration of the next projection for Israel, suggest a new central meridian, a new scale factor and the coordinates system based on a worldwide datum.