Question

Q1. Which of the following statements are false ?
(a) Inside, outside and boundary are basic topological operations.
(b) 9-intersection model formalizes binary topological relationship.
(c) Topological relationships change under elastic deformation.
(d) Direction (e.g., North, left) is a topological relationship.

Q2. Which of the following is not a topological query ?
(a) Which country has highest number of neighboring countries?
(b) List airports within 100 miles of Chicago, Illinois.
(c) Which rivers flow via at least six countries?
(d) List four US states whose boundaries are not defined by any rivers.
(e) List US cities which are north-west of a Canadian city.

Q3. Which of the following pairs are disjoint ?
(a) interior( Vatican City), interior (Italy)
(b) boundary( Vatican City), interior (Italy)
(c) interior( Vatican City), boundary (Italy)
(d) boundary( Vatican City), boundary (Italy)

Q4. Which of the following is modeled naturally by Entity Relationship Diagrams?
(a) Field (also knows as Raster) geographic data
(b) Object (also known as Vector) geographic data
(c) Map Algebra
(d) All of the above.

Q5. Which of the following is not one of the steps in spatial database design?
(a) Cartographic visual design.
(b) Conceptual data model design.
(c) Logical data model design.
(d) Physical data model design.

Q6. Identify true statements about pictogram enhanced conceptual data models?
(a) These help identify spatial entities.
(b) These depict spatial relationships explicitly in diagrams.
(c) These de-clutter conceptual data models by making spatial relationships implicit.
(d) These help generate SQL3/OGIS table definitions with spatial data-types.

Q7. Study the following ER diagram and answer the questions.

1) How many parcels can an owner own?
2) How many parcels can a road connect?
3) How many roads can be connected to a parcel?
4) What are the properties implied by the relationship "part_of" between a city and its districts?
5) What can we know from the pictogram of "City"? Is it always correct? Why?

Answer 1

Hello, Student I hope you are doing great in lockdown .

Here is answers of all of your questions if you have any doubt then feel free to ask in comment section, I am always happy to help you.

Q1. Which of the following statements are false ?
(a) Inside, outside and boundary are basic topological operations.
(b) 9-intersection model formalizes binary topological relationship.
(c) Topological relationships change under elastic deformation.
(d) Direction (e.g., North, left) is a topological relationship.

Answer : -Topological relationships change under elastic deformation.

Explanation: - Topological relationships change under elastic deformation is false statement because it is not part of Topological relationships.

Q2. Which of the following is not a topological query ?
(a) Which country has highest number of neighboring countries?
(b) List airports within 100 miles of Chicago, Illinois.
(c) Which rivers flow via at least six countries?
(d) List four US states whose boundaries are not defined by any rivers.
(e) List US cities which are north-west of a Canadian city.

Answer :- List US cities which are north-west of a Canadian city.

Explanation : -   List US cities which are north-west of a Canadian city is not a topological query because It is not following rules of  topological operations.

Q3. Which of the following pairs are disjoint ?
(a) interior( Vatican City), interior (Italy)
(b) boundary( Vatican City), interior (Italy)
(c) interior( Vatican City), boundary (Italy)
(d) boundary( Vatican City), boundary (Italy)

Answer: - interior( Vatican City), interior (Italy)

Explanation: - interior( Vatican City), interior (Italy) is pair of disjoint.

Q4. Which of the following is modeled naturally by Entity Relationship Diagrams?
(a) Field (also knows as Raster) geographic data
(b) Object (also known as Vector) geographic data
(c) Map Algebra
(d) All of the above.

Answer : - All of the above.

Explanation : all are modeled naturally by Entity Relationship Diagrams.

Q5. Which of the following is not one of the steps in spatial database design?
(a) Cartographic visual design.
(b) Conceptual data model design.
(c) Logical data model design.
(d) Physical data model design.

Answer : - Cartographic visual design

Explanation: - Cartographic visual design is not a step in spatial database design.

Q6. Identify true statements about pictogram enhanced conceptual data models?
(a) These help identify spatial entities.
(b) These depict spatial relationships explicitly in diagrams.
(c) These de-clutter conceptual data models by making spatial relationships implicit.
(d) These help generate SQL3/OGIS table definitions with spatial data-types.

Answer: - These help generate SQL3/OGIS table definitions with spatial data-types.

Explanation: - pictogram enhanced conceptual data models help generate SQL3/OGIS table definitions with spatial data-types.

Q7. Study the following ER diagram and answer the questions.

1) How many parcels can an owner own?
2) How many parcels can a road connect?
3) How many roads can be connected to a parcel?
4) What are the properties implied by the relationship "part_of" between a city and its districts?
5) What can we know from the pictogram of "City"? Is it always correct? Why?

Answer :- Where is ER- diagram ? without that answers are not possible .

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