CF Technology & Digital Tools 5

Question 1

What does 'georeferencing' a scanned historical map or aerial photo accomplish in a GIS workflow?

Accepted Answer

It assigns real-world geographic coordinates to the image so it aligns with other spatial data

Answer

Georeferencing assigns control points linking pixel locations to known geographic coordinates, enabling spatial alignment with other GIS layers.

Question 2

Which component of a GPS receiver is responsible for differentiating signals from multiple satellites to improve positional accuracy?

Accepted Answer

The internal clock maintaining precise timing for signal travel-time calculations

Answer

GPS positioning relies on precise timing of signal travel from satellites; the receiver's internal clock enables accurate distance calculations to each satellite.

Question 3

A forester wants to estimate above-ground biomass across a 10,000-acre watershed. Which remote sensing approach provides the most efficient landscape-scale estimate?

Accepted Answer

Airborne LiDAR-derived canopy height models combined with allometric equations

Answer

Airborne LiDAR canopy height models cover entire landscapes and, when combined with allometric equations, provide statistically robust biomass estimates.

Question 4

In GIS topology, what does a 'sliver polygon' represent and why is it problematic for forest stand maps?

Accepted Answer

A tiny erroneous polygon created at the boundary of two overlapping layers due to minor digitizing mismatches

Answer

Sliver polygons are artifacts from slight boundary mismatches between overlaid layers and can create false stand entries with invalid attributes.

Question 5

Which USFS national program provides standardized, plot-based forest inventory data at a state and national scale, and integrates with digital databases accessible to foresters?

Accepted Answer

FIA (Forest Inventory and Analysis)

Answer

The USFS Forest Inventory and Analysis (FIA) program conducts annual plot-based inventories and provides public database access for analysis.

(CF) Certified Forester Exam Practice Test

(CF) Certified Forester Exam Practice Test

CF Technology & Digital Tools 5