GAP Geographic Information Systems 3

Question 1

Which GIS function is used to combine two or more layers to produce a new output based on their spatial relationships?

Accepted Answer

Overlay analysis

Answer

Overlay analysis intersects, unions, or clips multiple spatial layers to reveal relationships, such as which soil types overlap with flood-prone zones.

Question 2

What is the primary advantage of using GPS-enabled farm equipment linked to GIS software?

Accepted Answer

It enables precise, geo-referenced recording of field operations and inputs

Answer

GPS-enabled equipment logs the exact location of field operations, creating geo-referenced records of planting, spraying, and harvesting activities.

Question 3

Which term describes the process of assigning geographic coordinates to a street address or farm location?

Accepted Answer

Geocoding

Answer

Geocoding converts descriptive location information (addresses, place names) into coordinate pairs that can be mapped in a GIS.

Question 4

For GAP certification, a GIS-based field map must typically include which of the following?

Accepted Answer

Field boundaries, water sources, and adjacent land uses

Answer

GAP field maps must show field boundaries, nearby water sources, roads, and adjacent land uses to document risk factors and traceability information.

Question 5

What is the function of a coordinate reference system (CRS) in GIS?

Accepted Answer

It defines how spatial data is projected and located on the Earth's surface

Answer

A CRS (or spatial reference system) defines the mathematical relationship between map coordinates and real-world locations, ensuring layers align properly.

(GAP) Good Agricultural Practices Certified Practice Test

(GAP) Good Agricultural Practices Certified Practice Test

GAP Geographic Information Systems 3