Spectral Indices
Key spectral reflectance of plants and water
What is spectral Indices?
NDVI stands for this
What is normalized difference vegetation index
This is reflectance at different wavelengths
what is imagery bands?/ what are bands?
NIR stands for this
What is near-infrared
Using multiband raster imagery to create classes of information
What is image classification?
These are used for many things including, identifying water, identifying plants, distinguishing healthy and unhealthy plants and distinguishing clear and turbid water
What is spectral indices?
NDMI stands for this
What is normalized difference moisture index
Collects data on external stimuli and reflects sunlight
What is a passive sensor?
SWIR stands for this
What is short-wave infrared?
Provides information in the form of training data that allows the computer to identify differences in land cover
What is supervised classification?
This band has the highest reflectance of water
What is green band?
NDWI stands for this
What is normalized difference water index
A remote sensor that emits a signal and captures the signal that is reflected back to the sensor
What is an active sensor?
NIR and SWIR make water appear this color or shade on a map
allows the computer to make the interpretations itself
What is unsupervised classification?
This band has the highest reflectance of vegetation
what is NIR?
NIR-red/NIR+red is the formula for this
This is an example of a passive sensor
What is landsat and sentinel 2?
What is SWIR?
See picture
What is answers may vary?
green-NIR/green+NIR is the formula for this
what is NDWI?
NIR-SWIR/NIR+SWIR is the formula for this
What is NDMI?
This is an example of an active sensor
What is Lidar and SRTM?
Chlorophyll reflects this
What is NIR?
See picture
What is answers may vary?