Single snapshots or movies are common examples of full field imaging used to represent information across a field, at an instant or over time. Scientific imaging has taken advantage of this modality of data acquisition in order to map the properties of materials or processes in the environment. Examples include X-rays for mapping broken bones and MRI for detection of tumors, or radio assisted detection and ranging (RADAR) imaging for mapping cloud density and precipitation in the atmosphere. This chapter provides a brief introduction to the applications of imaging for materials and environmental health monitoring. Applications discussed include imaging the intrinsic properties of subject of study, such as detection of subsurface corrosion, versus applications involving sensor molecules for extrinsic sensing, such as mapping transport of OH ions in concrete.