GAP Geographic Information Systems 2

Question 1

Which GIS data model stores geographic features as points, lines, and polygons?

Accepted Answer

Vector model

Answer

The vector data model represents geographic features as discrete points, lines, and polygons with associated attribute data.

Question 2

In GAP agriculture, what does a soil survey GIS layer typically help farmers determine?

Accepted Answer

Crop suitability and drainage potential

Answer

Soil survey GIS layers provide data on soil type, texture, and drainage class, helping farmers assess which crops are best suited for specific fields.

Question 3

What is the purpose of a buffer zone analysis in agricultural GIS?

Accepted Answer

To identify areas within a set distance of a feature such as a water body

Answer

Buffer analysis creates zones around features (e.g., streams or wells) to identify setback distances required for pesticide applications or other activities.

Question 4

Which satellite imagery resolution range is most commonly used for field-level precision agriculture mapping?

Accepted Answer

0.5 m – 10 m

Answer

Sub-meter to 10-meter resolution imagery provides enough detail to distinguish individual field zones, crop rows, and small landscape features.

Question 5

What does NDVI measure in remote sensing applications for agriculture?

Accepted Answer

Vegetation health and density using near-infrared and red bands

Answer

NDVI (Normalized Difference Vegetation Index) quantifies plant health by comparing near-infrared reflectance (high in healthy plants) to red light reflectance.

(GAP) Good Agricultural Practices Certified Practice Test

(GAP) Good Agricultural Practices Certified Practice Test

GAP Geographic Information Systems 2