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\section{Motivation and significance}  \label{}   Introduce the scientific background and the motivation for developing the software.  Explain why the software \section{Introduction}  Edge detection  is important, and describe the exact (scientific) problem(s) it solves.  Indicate in what way the software required for interpretation of gravity field data,and  has contributed (or how it will contribute been widely used  in tectonic studies and mineral explorations(Paterson and Reeves, 1985). To gain a better understanding of gravity sources, a variety of methods based on  the future) to the process use  of scientific discovery; if available, this is directional derivatives of different orders have been developed  to be supported by citing a research paper using locate anomalous source boundaries (Miller and Singh, 1994; Verduzcoet al., 2004; Cooper and Cowan, 2006; Wijns et al., 2005; Ma and Li,2012; Foks and Li, 2013).\\  In this paper,   we propose an edge detection method based on  the software.  Provide a description analysis of eigenvalues  of GGT. Considering  the experimental setting (how does actual geological situation,  the user use positive and negative density bodies usually coexist simultaneously. The proposed method has designed to outline  the software?).  Introduce related work in literature (cite or list algorithms used, other software etc.). positive/negative density bodies with the corresponding values.