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A signed graph (or sigraph in short) is an ordered pair $S=(S^u,\sigma )$, where $S^u$ is a graph G = (V,E), called the underlying graph of S and σ:E → +, - is a function from the edge set E of $S^u$ into the set +,-, called the signature of S. The ×-line sigraph of S denoted by $L_{\times }\left(S\right)$ is a sigraph defined on the line graph $L\left(S^u\right)$ of the graph $S^u$ by assigning to each edge ef of $L\left(S^u\right)$, the product of signs of the adjacent edges e and f in S. In this paper, first we define semi-total line sigraph and semi-total point sigraph of a given...