The book "Quality of Spatial Data in Command and Control Systems" offers a comprehensive analysis of the quality and reliability of digital geographic information used in the decision-making processes of command and control systems. It is aimed at professionals involved in the implementation and use of this information and highlights the critical requirements for the functionality of these data. Through practical examples, it illustrates how different quality levels of information can influence decision-making at various levels, particularly in the fields of emergency response and military operations. The authors, experienced scientists in the fields of cartography and geoinformatics, contribute their expertise to emphasize the user aspects of digital geographic information and underscore its importance in security-related applications.