_show_overview = true;
_ov_placement = OVERVIEW_PLACEMENT_TYPE.UPPER_LEFT;
_node_label_direction = NODE_LABEL_DIRECTION.HORIZONTAL;
_inverse_search_result = false;
_scale_bar_length = 0.0;
_show_overview = true;
_ov_placement = OVERVIEW_PLACEMENT_TYPE.UPPER_LEFT;
_node_label_direction = NODE_LABEL_DIRECTION.HORIZONTAL;
_inverse_search_result = false;
_scale_bar_length = 0.0;