The present invention is directed to methods and systems for describing and organizing image data. An analysis system includes a sensor, a processing unit, a machine, a database, and/or a display. The analysis system is connected to an electronic device. The sensor generates sensor data which is imported by the processing unit. The processing unit analyzes the sensor data to determine features of the sensor data such as the subject, the time, the location, the object, the event, and/or the action in the sensor data. The processing unit creates entries for the sensor data in a features index. The processing unit receives a query for an item and uses the features index to determine search results including the item, such as a location and a time of the item. The processing unit can also determine whether a machine has completed its mission using the features in the sensor data.