CFP Geographic Information Systems 2

Question 1

Which GIS data model is most appropriate for representing continuous phenomena like water temperature gradients across a lake?

Accepted Answer

Raster grid layer

Answer

Raster grids store continuous surface values in a matrix of cells, making them ideal for representing spatially continuous phenomena like temperature gradients.

Question 2

In fisheries GIS, what does the term 'geodatabase topology' primarily help enforce?

Accepted Answer

Spatial relationships and data integrity between features

Answer

Geodatabase topology defines and enforces spatial rules (e.g., streams must not overlap, polygons must not have gaps) to maintain data integrity.

Question 3

A fisheries biologist wants to identify all stream reaches within 500 meters of a boat ramp. Which GIS operation best accomplishes this?

Accepted Answer

Buffer followed by spatial join

Answer

Creating a 500 m buffer around the boat ramp and then spatially joining stream reaches identifies all features within that distance.

Question 4

What is the primary purpose of a Digital Elevation Model (DEM) in stream habitat analysis?

Accepted Answer

Deriving slope, aspect, and watershed boundaries

Answer

DEMs represent terrain elevation and are used to derive slope, aspect, flow direction, and delineate watershed boundaries for habitat analysis.

Question 5

Which projection minimizes distortion of area and is most appropriate for calculating acreage of wetland habitats in a GIS analysis?

Accepted Answer

Albers Equal-Area Conic

Answer

The Albers Equal-Area Conic projection preserves area relationships, making it suitable for calculating habitat acreages across large regions.

(CFP) Certified Fisheries Professional Practice Test

(CFP) Certified Fisheries Professional Practice Test

CFP Geographic Information Systems 2