GIS Data Models Quiz

What does the vector data model primarily use to represent spatial features?

• Polygons

• Points

• Lines

• Raster data

In the arc/node model, what is the basic unit used?

• Polygon

• Point

• Line (arc)

• Area

What is required for a shape to be classified as a polygon?

• It must have a direction

• It must be composed of multiple lines or arcs

• It must be a closed shape

• It must contain at least one point

What does topology in GIS primarily help with?

• Data conversion

• Data storage

• Automated error detection

• Data visualization

Which of the following is NOT a topological concept?

• Containment

• Adjacency

• Direction

• Connectivity

What is the purpose of snapping in GIS?

• To create polygons

• To connect unconnected arcs

• To eliminate slivers

• To ensure data accuracy

Which of the following formats is a true vector GIS data format?

• HPGL

• DXF

• SHP

• PostScript

What is the main disadvantage of vector data?

• It cannot represent continuous coverages well

• It requires more storage space

• It is harder to manipulate

• It is less accurate than raster data

What does the term 'closure' refer to in the context of polygons?

• The direction of the lines

• The requirement for a closed shape

• The uniqueness of object IDs

• The connection of arcs

Which of the following is a characteristic of the topological vector model?

• It does not store topology

• It uses raster data

• It uses the line (arc) as a basic unit

• It is only for point data