def from_epsg(self, epsg_code):
        """
        Loads self.prj by epsg_code.
        If prjtext not found returns False.
        """
        self.epsg_code = epsg_code
        assert isinstance(self.epsg_code, int)
        cur = self.conn.cursor()
        cur.execute("SELECT prjtext FROM prj_epsg WHERE epsg_code = ?", (self.epsg_code,))
        result = cur.fetchone()
        if result is not None:
            self.prj = result[0]
            return True

        return False