Remote sensing

Question 1

electromagnetic spectrum

Answer 1

the range of all possible frequencies/wavelengths of radiation

Question 2

passive sensor

Answer 2

Collects energy reflected or emitted from a surface within specified wavelength bands.

Question 3

active sensor

Answer 3

Emits EM radiation at specific wavelengths and collects energy that is reflected back from the surface.

Question 4

contrast

Answer 4

The range of brightness values in an image.

Question 5

Georeferencing

Answer 5

Assigning geographic coordinates to pixels in a raster data set.

Question 6

Geocoding

Answer 6

Converting addresses to geographic coordinates so that they may be placed on a map.

Question 7

spectral signature

Answer 7

Variation in the wavelengths at which a material reflects or emits EM radiation

Question 8

Resolution

Answer 8

The range at which difference is detected by a sensor. It may be spatial (pixel size), spectral (bandwidth and number of bands), temporal (repeat time interval), or radiometric (intensity).