B.S.F. or B.Sc.F. Bachelor of Science in Forestry Bachelor of Science in Forestry: Remote Sensing and GIS in Forestry 3

Question 1

Synthetic Aperture Radar (SAR) remote sensing is particularly valuable in forestry because it can do which of the following that optical sensors cannot?

Accepted Answer

Penetrate cloud cover and forest canopy to detect structure

Answer

Detect chlorophyll fluorescence

Answer

Measure photosynthetic rates directly

Answer

Capture images at sub-meter spatial resolution

Question 2

Change detection analysis in forest remote sensing compares images from two or more dates to identify which of the following?

Accepted Answer

Areas where land cover or forest condition has changed over time

Answer

Differences in sensor calibration between satellite missions

Answer

Variations in pixel color due to atmospheric haze

Answer

Changes in map projection systems between images

Question 3

The approximate spatial resolution of standard Landsat 8 and Landsat 9 multispectral bands used for forest mapping is:

Accepted Answer

30 meters

Answer

1 meter

Answer

10 meters

Answer

250 meters

Question 4

An accuracy assessment of a forest cover map derived from satellite imagery typically reports an 'overall accuracy' and a 'Kappa coefficient.' What does the Kappa coefficient measure?

Accepted Answer

Agreement between the classification and reference data beyond what is expected by chance

Answer

The total area of forest correctly classified

Answer

The number of ground truth points collected in the field

Answer

The spectral separability between forest classes

Question 5

Hyperspectral remote sensing differs from multispectral remote sensing primarily because hyperspectral sensors:

Accepted Answer

Collect data in hundreds of narrow, contiguous spectral bands

Answer

Operate exclusively in the thermal infrared region

Answer

Have significantly coarser spatial resolution

Answer

Require ground-based laser illumination

Question 6

In GIS-based forest harvest planning, a 'least-cost path' analysis is used to determine which of the following?

Accepted Answer

The optimal road or skid trail route minimizing terrain friction and cost

Answer

The minimum stumpage value of a timber sale

Answer

The area of forest that maximizes timber volume per hectare

Answer

The shortest travel time from a ranger station to a fire location

Question 7

Which satellite program, operated by the European Space Agency, provides free 10-meter resolution multispectral imagery every 5 days and is increasingly used for high-resolution forest monitoring in the United States?

Accepted Answer

Sentinel-2

Answer

MODIS (Terra/Aqua)

Answer

SPOT-6

Answer

RapidEye