1. FIGURE 9. 1. Different sensor types
FIGURE 9.1. Different sensor types. A key distinction is made between passive sensors and active sensors. Passive sensors use only reflected electromagnetic radiation (EMR). Active sensors use emitted EMR.
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

2. FIGURE 9.2. Emitted and reflected electromagnetic energy that remote sensing sensors receive to create remote sensing data or images.
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

3. FIGURE 9.3. The electromagnet spectrum showing common examples and corresponding sizes to compare wavelengths. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

4. FIGURE 9.4. Examples of spectral signatures and wavelengths of reflected electromagnetic radiation. Note that a micrometer is one millionth of a meter. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

5. FIGURE 9. 5. Illustration of different bandwidths used by Landsat 7
FIGURE 9.5. Illustration of different bandwidths used by Landsat 7. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

6. FIGURE 9.6. Comparison of spatial resolutions for aerial photography and Landsat 7 and most Landsat 8 bands. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

7. FIGURE 9.7. Multispectral sensors produce data and imagery to help monitor and model complex coastal changes. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

8. FIGURE 9.8. A composite of different multispectral data to produce a “picture­like” image of the world. From
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.

9. FIGURE 9.9. Aerial imagery (here from a digitized aerial photograph) can show a great amount of detail. Some newer satellites have been able to record data at similar resolutions, but have been restricted by national laws and security concerns.
From A Primer of GIS, 2nd edition, by Francis Harvey. Copyright by The Guilford Press.