Spatial Data Models in GIS Questions and Answers

Q: The 'boundary model' is sometimes also called as :

The boundary model is also called the Topological data model.In GIS, the boundary model represents areas by their bounding lines: arcs that meet at nodes and carry the identity of the polygons on their left and right. Because these explicit relationships of connectivity, adjacency and containment are topology, the boundary model is also known as the topological (arc-node) vector data model.Temporal models deal with change over time, not with boundaries, and 'topological discrete' and 'temporal discrete' are not standard names for this model.

Q: A good example of raster data is ....................

A good example of raster data is satellite imagery.Raster data store the world as a grid of cells (pixels), each holding a value such as reflectance, elevation or land cover. A satellite image is exactly that: rows and columns of pixels recorded by a sensor.A railway line is a line feature, and dug wells and airports are point (or small polygon) features. In a GIS such discrete objects are normally stored as vector data, with coordinates for points, lines and polygons.

The 'boundary model' is sometimes also called as :

A.Topological data model
B.Temporal data model
C.Topological discrete model
D.Temporal discrete model

Exam Year(s)

MH SET - 2023, SET Exam - 2023,

Answer: A

The boundary model is also called the Topological data model.

In GIS, the boundary model represents areas by their bounding lines: arcs that meet at nodes and carry the identity of the polygons on their left and right. Because these explicit relationships of connectivity, adjacency and containment are topology, the boundary model is also known as the topological (arc-node) vector data model.

Temporal models deal with change over time, not with boundaries, and 'topological discrete' and 'temporal discrete' are not standard names for this model.

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A good example of raster data is ....................

A.Satellite imagery
B.Railway line
C.Dug wells
D.Airports

Exam Year(s)

MH SET - 2024, SET Exam - 2024,

Answer: A

A good example of raster data is satellite imagery.

Raster data store the world as a grid of cells (pixels), each holding a value such as reflectance, elevation or land cover. A satellite image is exactly that: rows and columns of pixels recorded by a sensor.

A railway line is a line feature, and dug wells and airports are point (or small polygon) features. In a GIS such discrete objects are normally stored as vector data, with coordinates for points, lines and polygons.

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Which of the following is correct about attribute data in Geographic Information System ?

A.Attributes are pieces of data that are connected or related to the points, lines or polygons mapped in the GIS.
B.Attribute data can be analysed to determine patterns of importance.
C.Attribute data is entered directly into a database where it is associated with element data.
D.All of the above

Exam Year(s)

UGC NET - 2012,

Answer: D

All of the statements are correct, option D. In a geographic information system the attributes are the pieces of data tied to the points, lines or polygons on the map, as option A says. They can be analysed to find patterns, as option B says, and they are entered into a database where they are linked to the map elements, as option C says.

Since each of the three statements is correct, none of the first three options is a full answer, and option D, all of the above, is the only complete one.

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Spatial Data Models in GIS Questions and Answers

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