FCCs and Vegetation Color
False Color Composites (FCCs) are image displays where standard color assignments are altered. This technique is commonly used in remote sensing to highlight specific features, such as vegetation.
In a standard FCC, often referred to as a Color Infrared (CIR) composite, the processing assigns specific spectral bands captured by a satellite sensor to the display colors (Red, Green, Blue).
Standard FCC Band Mapping
- The Near-Infrared (NIR) band, which healthy vegetation strongly reflects, is mapped to the Red color channel.
- The Red band is mapped to the Green channel.
- The Green band is mapped to the Blue channel.
Consequently, because vegetation reflects significantly in the NIR spectrum, and this NIR reflectance is displayed as Red, vegetation appears red in standard FCC images.
Important Questions from Remote Sensing Basics
- Which one of the following statements about Normalized Difference Vegetation Index (NDVI) is incorrect?
A map is prepared on 1:50,000 scale. How many cm on the map represents 1.0 km on the ground?
Which one of the following pairs helps to distinguish between different types of rocks and soils?
- What is the typical period of revolution of a polar-orbiting Earth satellite, orbiting at a height of $\sim 700\text{ km}$ from the Earth's surface?
- To distinguish between different rock types, a sensor with high _____ resolution is best
