Different types of decision support systems for military as well as crisis management related applications must be available for integration in network based command and control systems. These decision support tools must in most cases be possible to use for collection, fusion, handling, storage and finally also for visualization of information from a large number of sensor datasources. The information collected and manipulated in any of these ways should primarily support the end-users in their decision making activities. In modern command and control systems this type of decision support tools will essentially be service oriented. Special requirements concerning generality, usability and flexibility must be determined for these services as well. In this work is a query based and service oriented information system adopted to network based command and control applications, primarily for ground target reconnaissance using sensor data input, described. Other important properties in this service based system are sensor interoperability and sensor data independence.