1. A method comprising: receiving an image of a storage tank at a processing system from a thermal sensor outside of the storage tank, the storage tank capable of storing one or more materials; receiving data from one or more other sensors at the processing system, the one or more other sensors comprising at least one sensor disposed within the storage tank; and processing the image and the data from the one or more other sensors to identify a profile of sludge or sediment present in the storage tank; wherein the profile identifies a plurality of heights of the sludge or sediment present in the storage tank horizontally across the storage tank, and wherein the heights of the sludge or sediment vary across the storage tank.