Practice Test Geeks(GAP) Good Agricultural Practices Certified Practice Test
← All GAP Flashcard Decks

Geographic Information Systems Flashcards

7 cards from real GAP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Geographic Information Systems flashcards as text

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

    Answer: Overlay analysis

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

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

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

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

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

    Answer: Geocoding

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

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

    Answer: Field boundaries, water sources, and adjacent land uses

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

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

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

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

  6. A grower uses GIS to identify which fields are within 200 feet of a municipal water intake. This is an example of:

    Answer: Proximity or buffer analysis

    Proximity analysis (buffer analysis) identifies all features within a specified distance of a target feature, such as fields near a water intake.

  7. Which data collection method is most efficient for capturing the boundary of a large agricultural field in the field?

    Answer: GPS rover or GNSS device walked around the perimeter

    A GPS or GNSS rover records precise coordinates as an operator walks the field boundary, producing an accurate digital polygon in minutes.