GIS - Geographic Information System Geospatial Data Fundamentals Questions and Answers

Question 1

A GIS analyst is preparing data for a regional watershed analysis project.
The analysis requires precise area calculations and distance measurements in meters.
The source data is currently stored in a Geographic Coordinate System (GCS).
Which of the following steps is essential for the analyst to perform before conducting the analysis?

Accepted Answer

Project the data into a suitable Projected Coordinate System (PCS).

Answer

Assign a new datum to the existing GCS.

Answer

Convert the data's angular units from degrees to radians.

Answer

Increase the resolution of the raster data layers.

Question 2

Which of the following statements most accurately describes a key difference between the vector and raster data models?

Accepted Answer

Vector data uses points, lines, and polygons to represent features, making it ideal for network analysis and representing discrete boundaries.

Answer

Vector data is better suited for representing continuous phenomena like elevation, while raster data excels at representing discrete features like property lines.

Answer

Raster data structures are generally more compact and require less storage space than vector data for representing large, simple polygons.

Answer

Raster data is resolution-independent, meaning features retain their clarity and precision regardless of the map scale.

Question 3

A cartographer is creating a detailed map of a small city park, intended for use in a brochure. The map needs to show features like individual benches, pathways, and flower beds with high accuracy. Which map scale would be most appropriate for this purpose?

Accepted Answer

1:5,000

Answer

1:500,000

Answer

1:250,000

Answer

1:50,000

Question 4

In geospatial data management, what is the primary purpose of topology?

Accepted Answer

To define and enforce spatial relationships between adjacent or connected features.

Answer

To define the map projection and coordinate system of a dataset.

Answer

To store attribute information in a relational database for vector features.

Answer

To describe the data's origin, accuracy, and lineage for user evaluation.

Question 5

A GIS user downloads a shapefile of national park boundaries. To understand the data's source, its collection date, attribute definitions, and any use constraints, the user should look for which of the following?

Accepted Answer

The metadata

Answer

The attribute table

Answer

The projection file (.prj)

Answer

The topological rules

Question 6

Which of the following is a primary disadvantage of the raster data model?

Accepted Answer

File sizes can become very large, especially for high-resolution data.

Answer

It is inefficient for performing overlay analysis and mathematical modeling.

Answer

It represents linear features and boundaries with high precision regardless of scale.

Answer

It cannot represent continuous data, such as elevation or temperature.