Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

GIS > Topology > Flashcards

Topology Flashcards

1
Q

What is topology in GIS?

A

Topology deals with spatial properties that remain unchanged under specific transformations and defines spatial relationships between entities.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the three elements of topology?

A

Adjacency, containment, and connectivity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why is topology important in GIS?

A

It ensures geometric correctness, improves data quality, and supports spatial analysis like network tracing and polygon adjacency.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is adjacency in topology?

A

A concept that determines the relationships between features that share a boundary.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Define containment in topology.

A

It describes area features that are wholly contained within another area feature, like an island in a lake.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is connectivity in topology

A

A property that describes linkages between line features, such as road networks.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is arc-node topology?

A

structure where arcs connect at nodes, enabling identification of connectivity in features.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How does topology improve data quality?

A

By detecting and correcting digitizing errors and ensuring accurate and error-free data.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What efficiency does topology offer?

A

It allows large datasets to be processed quickly and optimizes GIS queries.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Name a use of adjacency in GIS.

A

Identifying plots adjacent to a river.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is an example of containment in GIS?

A

Determining which spatial features are contained within a polygon.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Give an example of connectivity analysis.

A

Finding the shortest path to an airport.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How does topology aid in network analysis?

A

By enabling operations like network tracing and pathfinding.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What are the eight spatial relationships?

A

Disjoint, meets, equals, inside, covered by, contains, covers, and overlaps.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

How does topology express spatial relationships?

A

Through adjacency, containment, and connectivity to maintain data consistency.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What role do nodes play in topology?

A

Nodes define the endpoints of line segments and arcs.

17
Q

What is Rule 1 of topological consistency?

A

Every arc must be bounded by two nodes: a begin and an end node.

18
Q

What does Rule 3 state about polygons?

A

Every polygon must have a closed boundary consisting of an alternating sequence of nodes and arcs.

19
Q

Why are topological rules crucial?

A

They maintain the integrity and consistency of spatial data.

20
Q

Name a common topological error for polygons.

A

Unclosed polygons or sliver polygons

21
Q

What is a common error in line features?

A

Overshoot or undershoot of lines.

22
Q

How does topology detect errors?

A

By automatically verifying data consistency and correcting violations of topology rules.

23
Q

What is the role of topology in geodatabases?

A

To manage shared geometry, enforce data integrity rules, and support spatial queries.

24
Q

Can feature classes participate in multiple topologies?

A

No, feature classes can only participate in one topology.

25
Q

What must all feature classes in a topology share?

A

The same spatial reference.

26
Q

What spatial relationship applies to adjacent parcels?

A

Adjacent parcels share boundaries and must not overlap.

27
Q

How is containment used in geocoding?

A

To identify which features are wholly contained within a specified boundary.

28
Q

Why is contiguity essential for vector data models?

A

It ensures adjacency of features that share boundaries, aiding in overlay operations.

29
Q

What is polygon-arc topology?

A

A representation of polygons as an ordered list of arcs, ensuring reduced data storage and consistent boundaries.

30
Q

How does topology support editing tools?

A

By enabling the construction of features from unstructured geometries and maintaining spatial relationships.

GIS (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions