T he 4th edition of Introductory Digital Image Processing: A Remote Sensing Perspective provides up-to-date information on analytical methods used to analyze digital remote sensing data. T he book is ideal for introductory through graduate level university instruction in departments that routinely analyze airborne and/or satellite remote sensor data to solve geospatial problems, including: geography, geology, marine science, forestry, anthropology, biology, soil science, agronomy, urban planning, and others.