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These 2 spreadsheets are to make Stereographic projections using either the Wulff Equal-Angle or the Schmidt Equal-Area
methods. Stereographic projection plots are commonly used in Structural Geology to measure and understand the relationships
between elements such as bedding attitude, fold axes, planar cleavage, rotation and display of dipmeter data, multiple
structural deformations, and other uses. The Schmidt Equal-Area method is commonly used for measuring and contouring point
density. The Wulff Equal-Angle method has the property of preserving specific angles between features and is commonly used
for measuring angles between structural elements.
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