The heavy value is the amount of gravity acceleration in relation to a point defined in position and height. These points are usually points of the height or position field. Reference framework for all heavy values in Austria is the Austrian Schweregrundnetz (ÖSGN), which consists of approximately 800 points. The level is 0 by 42 points. Order determined with absolute gravity measurements (freefall gravity). The severity values of the orders 1 to 3 were derived from cross-linked measurements with relative gravityimeters (spring gravityimeters).
In addition, there are about 22,000 levelling points with gravity values and another 42,000 area-distributed gravitational points. Using the digital terrain height model, mean severity values were calculated along the solder line, as well as Bouguer anomalies. Surface gravity values can be interpolated at any point from the boguer heavy field.
The severity values are managed together with the level points in the Nivellement Heavy Database (NSDB). The data sets contain surface gravity, coordinates and height of the reference point, and also the calculated values for the mean solder line weight and the boguer weight. For ÖSGN points there are point descriptions with heavy value and geocoding.
The Austrian Heavyweight Map provides an overview of the gravity field in Austria in the form of Bouguer anomalies and allows conclusions about the crust structure and density distribution.
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