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| Israeli Transverse Mercator ： ウィキペディア英語版 |
Israeli Transverse Mercator
Israeli Transverse Mercator ((ヘブライ語:רשת ישראל החדשה); ITM) is the new geographic coordinate system for Israel. The name is derived from the Transverse Mercator projection it uses and the fact that it is optimized for Israel. ITM has replaced the old coordinate system ICS. This coordinate system is sometimes also referred as the "New Israeli Grid". It is in use since January 1, 1994.
==The need for a new grid==
ITM replaced the old grid ICS which was based on the Cassini-Soldner projection. The central meridian in the new projection, as in the old one, crosses through Jerusalem. Replacing the projection eliminates two prominent drawbacks in the old network: assigning negative latitudinal values to the Southern Negev and the possibility of confusing coordinate values on the X and Y axes. The new system relocated the Y axis 50 km westward and the X axis 500 km southward so that now the entire country is covered by positive coordinate values.
Additional information on the creation of the new grid is available in Hebrew〔(Information in Hebrew ) about the New Israeli Grid, published by the Mapping Center of Israel (MAPI) in the (official website )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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