M9 - AG Quiz - Vector Analysis

1. True or False: Multi-criteria overlay analysis is a method used to combine multiple layers of geographic information into a single layer.

• True

• False

Answer explanation

• Multi-criteria overlay analysis is used to combine multiple layers of geographic information based on various criteria to identify suitable locations, not to merge them into a single layer.

What is the primary purpose of multi-criteria overlay analysis in GIS?

• To combine multiple layers of geographic information into a single layer

• To analyze the spatial relationships between different geographic features

• To identify suitable locations based on the combination of several criteria

• To visualize data in a GIS environment

Answer explanation

• Multi-criteria overlay analysis is used to combine multiple layers of geographic information based on various criteria to identify suitable locations for a particular purpose.

What is a common method used to combine multiple criteria in a vector overlay analysis?

• Weighted sum

• Hillshade

• Buffering

• Clipping

Answer explanation

• The weighted sum method is a common approach used to combine multiple criteria in a vector overlay analysis. It involves assigning weights to each criterion and summing the weighted values to obtain a final suitability score.

In multi-criteria overlay analysis, how are weights assigned to different criteria?

• Based on their visual representation on the map

• Randomly

• Through stakeholder input or analytical methods

• Automatically by the GIS software

Answer explanation

• Weights are typically assigned to different criteria based on stakeholder input or analytical methods, such as pairwise comparison or analytical hierarchy process (AHP), to reflect their relative importance in the analysis.

1. True or False: The weighted sum method in multi-criteria overlay analysis assigns equal importance to all criteria.

• True

• False

Answer explanation

• The weighted sum method in multi-criteria overlay analysis assigns different weights to criteria based on their relative importance, not equal importance.

Which of the following is a potential limitation of multi-criteria overlay analysis?

• It is only applicable to raster data

• It can be sensitive to the choice of weights assigned to criteria

• It is not suitable for analyzing spatial relationships

• It requires specialized GIS software

Answer explanation

• One of the limitations of multi-criteria overlay analysis is that the results can be sensitive to the choice of weights assigned to criteria, which can affect the final outcome and interpretation of the analysis.