GIS Conceptual Foundations 5

Question 1

Which type of map projection preserves area but distorts shape?

Accepted Answer

Equal-area projection

Answer

Equal-area (equivalent) projections maintain correct area relationships across the map but distort the shapes of features.

Question 2

What is the fundamental difference between 'discrete' and 'continuous' spatial phenomena?

Accepted Answer

Discrete phenomena have defined boundaries; continuous phenomena vary smoothly without clear boundaries

Answer

Discrete phenomena (e.g., land parcels, roads) have distinct, definable boundaries, while continuous phenomena (e.g., temperature, elevation) vary smoothly across space.

Question 3

What is the purpose of a 'coordinate transformation' in GIS?

Accepted Answer

To convert features from one coordinate reference system to another

Answer

A coordinate transformation mathematically converts feature coordinates from one reference system (e.g., NAD27) to another (e.g., WGS84) so datasets align correctly.

Question 4

In the context of GIS, what is 'spatial data infrastructure' (SDI)?

Accepted Answer

A framework of policies, standards, and technologies enabling the sharing and use of spatial data across organizations

Answer

A Spatial Data Infrastructure provides the policies, standards, technologies, and institutional arrangements needed to coordinate and share geographic information across agencies and jurisdictions.

Question 5

Which statement correctly describes the difference between 'nominal' and 'ratio' measurement scales in GIS attribute data?

Accepted Answer

Nominal data categorizes features with no inherent order; ratio data has a true zero and meaningful proportions

Answer

Nominal data classifies features into unordered categories (e.g., land use type), while ratio data has a true zero point allowing proportional comparisons (e.g., population count).

GIS - Geographic Information System Practice Test

GIS - Geographic Information System Practice Test

GIS Conceptual Foundations 5