Stakeholder mapping means that the stakeholders are visualized in a map. These can be made by hand or with specialized software. A framework that can be used is that of stakeholder salience . In this approach, stakeholders can be mapped based on their power, legitimacy and urgency. This can be done by both the project team and other stakeholders.
Stakeholder mapping provides an overview of the stakeholders. Moreover, the importance of the distinct stakeholders becomes clearer, because it is displayed visually.
 Mitchell, R. K., Agle, B. R., & Wood, D. J. (1997). Toward a theory of stakeholder identification and salience: Defining the principle of who and what really counts. Academy of Management Review, 22(4), 853-886.