Selecting the Actual Channels

Now we're ready to select the channels for our product. Of the combinations below, which would produce the best natural color product, one that emphasizes features such as topography, vegetation, and snow cover? (Choose the best answer.) Note that for the sake of readability, we've removed the micrometer symbols from the channels.

The correct answer is D.

The 0.6-µm VIS, 0.8-µm VIS, and 1.6-µm NIR channels represent solar wavelengths that are effective for imaging terrain features. Most of the other channels sense at infrared wavelengths, only some of which can be used to detect surface features.