Xyscan is a tool for scientist in the need to extract data points (numeric values), from a plot. It allows to scan the plots and extract data points including the size of the error bars (both in x and y). The app can handle plots with linear and logarithmic scales. In fact xyscan can be used for extracting numeric values from any kind of 2D technical drawings.
Convert angular diameters of deep sky objects into actual diameters.
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