Let $K$ be a complete, non-archimedean, non-trivially valued field, $V$ a strictly $K$-analytic space and $L$ a line bundle on $V$. A continuous metric $\|\cdot\|$ on $L$ is called locally semipositive if for any $x\in V$ there is an open neighbourhood $U$ of $x$ such that $\|\cdot\|\Big|_{U}$ is a uniform limit of semipositive piecewise $\mathbb{Q}$-linear metrics on $L\Big|_{U}$. It is called locally potentially semipositive if its base change to the completion of an algebraic closure of $K$ is locally semipositive. If $V$ is an open subset of $X^{\textup{an}}$ for a separated scheme $X$ of finite type over $K$ then using the Remarks 4.14 and 4.16 we define the Monge-Ampère measure $c_{1}(\overline{L}_{1})\wedge...\wedge c_{1}(\overline{L}_{n})$ for locally potentially semipositive metrized line bundles $\overline{L}_{1},...,\overline{L}_{n}$ on $V$.