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Questions and Answers
If you want to evaluate the effectiveness of a new transportation policy, what type of change analysis would be most helpful?
If you want to evaluate the effectiveness of a new transportation policy, what type of change analysis would be most helpful?
What is a key factor in identifying the best method for mapping change?
What is a key factor in identifying the best method for mapping change?
What type of data is represented by a change in character or magnitude that shows the quantity of a feature?
What type of data is represented by a change in character or magnitude that shows the quantity of a feature?
Which of the following is NOT a reason to map change?
Which of the following is NOT a reason to map change?
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Which type of feature is BEST represented as a tracking map?
Which type of feature is BEST represented as a tracking map?
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Which type of feature would be best suited for mapping the spread of a disease?
Which type of feature would be best suited for mapping the spread of a disease?
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How can you map the change in the population density of a city over time?
How can you map the change in the population density of a city over time?
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What is the primary benefit of understanding how things behave over time?
What is the primary benefit of understanding how things behave over time?
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How many maps should be used to visualize a trend in the movement of a phenomenon represented by discrete events?
How many maps should be used to visualize a trend in the movement of a phenomenon represented by discrete events?
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When mapping contiguous features, what is the best approach to depict the movement of the feature?
When mapping contiguous features, what is the best approach to depict the movement of the feature?
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What method can be used to show changes in the magnitude of a feature over time?
What method can be used to show changes in the magnitude of a feature over time?
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If the boundaries of the areas being mapped have changed over time, what should be done to handle these changes?
If the boundaries of the areas being mapped have changed over time, what should be done to handle these changes?
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When visualizing changes in value for each area from one time period to another, what type of chart can be used?
When visualizing changes in value for each area from one time period to another, what type of chart can be used?
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What is the most common strategy when representing negative values in change calculations?
What is the most common strategy when representing negative values in change calculations?
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Why is it difficult to visually compare more than 5 or 6 maps?
Why is it difficult to visually compare more than 5 or 6 maps?
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How can the speed of movement of a feature be visualized when mapping individual features?
How can the speed of movement of a feature be visualized when mapping individual features?
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What is the performance value for the 'Selective Clearing' option in the Riparian Vegetation Management example?
What is the performance value for the 'Selective Clearing' option in the Riparian Vegetation Management example?
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In Step 2: Structuring the decision problem of the 6-Step Procedure, what does 'SMART' represent?
In Step 2: Structuring the decision problem of the 6-Step Procedure, what does 'SMART' represent?
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Which of the following is NOT a step in the 6-Step Procedure for Multi-Criteria Evaluation (MCE)?
Which of the following is NOT a step in the 6-Step Procedure for Multi-Criteria Evaluation (MCE)?
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What is the purpose of assigning weights to each criterion in MCE?
What is the purpose of assigning weights to each criterion in MCE?
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Which method of scoring alternatives in relation to criteria involves determining the likelihood of a location being suitable for a specific purpose?
Which method of scoring alternatives in relation to criteria involves determining the likelihood of a location being suitable for a specific purpose?
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In the Performance Matrix, which criterion holds the highest weight in the Riparian Vegetation Management example?
In the Performance Matrix, which criterion holds the highest weight in the Riparian Vegetation Management example?
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What does 'Sj' represent in the weighted summation formula: Sj = Σ (i-1) Wi Xij?
What does 'Sj' represent in the weighted summation formula: Sj = Σ (i-1) Wi Xij?
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How are performance values determined in the Riparian Vegetation Management example?
How are performance values determined in the Riparian Vegetation Management example?
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What value (on a scale of 0 to 1) represents a criterion that is considered the most important?
What value (on a scale of 0 to 1) represents a criterion that is considered the most important?
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In the AHP method, what does the 'CR' represent?
In the AHP method, what does the 'CR' represent?
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What is one benefit of using the AHP method for weighing criteria?
What is one benefit of using the AHP method for weighing criteria?
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You are evaluating the impact of a new irrigation system on a river. Which of the following criteria would NOT be appropriate for using the AHP method?
You are evaluating the impact of a new irrigation system on a river. Which of the following criteria would NOT be appropriate for using the AHP method?
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In the provided AHP matrix, which criterion is considered to be the least important for the evaluation?
In the provided AHP matrix, which criterion is considered to be the least important for the evaluation?
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Which of the following statements is CORRECT about the AHP method?
Which of the following statements is CORRECT about the AHP method?
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What does the 'NON-WEIGHTED MCE (binary)' approach involve?
What does the 'NON-WEIGHTED MCE (binary)' approach involve?
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When conducting an AHP analysis, what should you do if the Consistency Ratio (CR) is greater than 0.10?
When conducting an AHP analysis, what should you do if the Consistency Ratio (CR) is greater than 0.10?
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Which of the following is NOT a method of multicriteria decision analysis (MCDA)?
Which of the following is NOT a method of multicriteria decision analysis (MCDA)?
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In the context of GIS-based MCDA, what does 'sensitivity analysis' involve?
In the context of GIS-based MCDA, what does 'sensitivity analysis' involve?
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What is the primary advantage of using a weighted linear combination (WLC) in MCDA?
What is the primary advantage of using a weighted linear combination (WLC) in MCDA?
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Which of the following GIS packages is mentioned as having specialized modules for MCDA, including standardization and weighting functionalities?
Which of the following GIS packages is mentioned as having specialized modules for MCDA, including standardization and weighting functionalities?
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What kind of data is typically used to create a digital elevation model (DEM)?
What kind of data is typically used to create a digital elevation model (DEM)?
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Which of the following is a valid reason to apply the KISS approach (Keep It Simple and Stupid) to MCDA?
Which of the following is a valid reason to apply the KISS approach (Keep It Simple and Stupid) to MCDA?
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Which of the following is NOT a characteristic of 3D GIS?
Which of the following is NOT a characteristic of 3D GIS?
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Which of the following statements BEST describes the importance of validation in GIS-based MCDA?
Which of the following statements BEST describes the importance of validation in GIS-based MCDA?
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Which of the following is NOT a key component of GIS-based MCE?
Which of the following is NOT a key component of GIS-based MCE?
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What is the main difference between 'Factors' and 'Constraints' in the context of criteria for MCE?
What is the main difference between 'Factors' and 'Constraints' in the context of criteria for MCE?
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What is the primary purpose of using z layers in calculating change in continuous categories?
What is the primary purpose of using z layers in calculating change in continuous categories?
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In the second approach to calculating change in continuous categories, how is the area change calculated?
In the second approach to calculating change in continuous categories, how is the area change calculated?
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What is the main advantage of using a GIS-based approach for MCE?
What is the main advantage of using a GIS-based approach for MCE?
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What is the main limitation of using only GIS and spatial analysis for decision-making?
What is the main limitation of using only GIS and spatial analysis for decision-making?
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Which of the following statements accurately describes the first approach to calculating change in continuous categories?
Which of the following statements accurately describes the first approach to calculating change in continuous categories?
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Which of these is a NOT a correct description of the third approach for calculating change in continuous categories?
Which of these is a NOT a correct description of the third approach for calculating change in continuous categories?
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Flashcards
Geospatial Intelligence
Geospatial Intelligence
The use of data related to geographic locations to gain insights.
Why map change?
Why map change?
Mapping change helps understand behavior, anticipate futures, and evaluate actions.
Types of change
Types of change
Categories of change include location data and character/magnitude changes.
Change in Location Data
Change in Location Data
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Change in character or magnitude
Change in character or magnitude
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Discrete features
Discrete features
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Events
Events
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Continuous values
Continuous values
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Number of maps to show
Number of maps to show
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Mapping individual features
Mapping individual features
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Mapping linear features
Mapping linear features
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Mapping contiguous features
Mapping contiguous features
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Mapping events
Mapping events
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Measuring Change
Measuring Change
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Negative values
Negative values
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Boundary changes
Boundary changes
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Normalization
Normalization
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Analytical Hierarchy Process (AHP)
Analytical Hierarchy Process (AHP)
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Consistency Ratio (CR)
Consistency Ratio (CR)
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Weighted Criterion
Weighted Criterion
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Pairwise Comparison Matrix
Pairwise Comparison Matrix
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Mean Value Calculation
Mean Value Calculation
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Eigen Vector
Eigen Vector
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Criteria Classification (Binary)
Criteria Classification (Binary)
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Weighted Linear Combination (WLC)
Weighted Linear Combination (WLC)
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Multicriteria Decision Analysis (MCDA)
Multicriteria Decision Analysis (MCDA)
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Sensitivity Analysis
Sensitivity Analysis
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Ground Truth Verification
Ground Truth Verification
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Digital Elevation Model (DEM)
Digital Elevation Model (DEM)
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Contour Lines
Contour Lines
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Ordered Weight Average (OWA)
Ordered Weight Average (OWA)
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GIS-Based MCE
GIS-Based MCE
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Change Calculation in GIS
Change Calculation in GIS
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Layer Overlay Method
Layer Overlay Method
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Area Change Calculation
Area Change Calculation
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Change Map Creation
Change Map Creation
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GIS-Based MCE Introduction
GIS-Based MCE Introduction
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Decision Alternatives
Decision Alternatives
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Criteria in MCE
Criteria in MCE
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Decision Rule
Decision Rule
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Riparian Vegetation Management
Riparian Vegetation Management
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Performance Value
Performance Value
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Weighted Summation
Weighted Summation
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MCE
MCE
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6-Step MCE Procedure
6-Step MCE Procedure
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Decision Context
Decision Context
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Scoring Alternatives
Scoring Alternatives
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Criteria Weights
Criteria Weights
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Study Notes
Geospatial Intelligence (GIS) Test
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GIS lets you map where things move over time. Understanding changes can help evaluate the results of an action or policy.
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Topics include:
- Why map change?
- Defining your analysis
- Three ways of mapping change
- Creating a time series map
- Creating a tracking map
- Measuring and mapping change
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Why Map Change?
- Gain insight into how things behave
- Anticipate future conditions/needs
- Decide on a course of action
- Evaluate results of an action by mapping conditions before and after an action.
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Defining Your Analysis
- Show location of features at each date
- Calculate and map the differences in value for each feature over more dates.
Types of Change
- Change in Location: Helps predict where features will move.
- Change in Character or Magnitude: Shows how conditions have changed in a place, the change can be in the type of feature or a quantity associated with each feature.
Geographic Features
- Type of features you're mapping help determine the best method to map change.
- Features that move:
- Discrete features (tracked as they move through space, they might be individual, linear, or features of areas)
- Events (geographical phenomena that occur at different locations, the movement can be tracked and mapped for that period of time)
Measuring Time
- Time Patterns: Shows change between two or more dates or times.
- Indicates whether something is increasing or decreasing
- Shows the direction of feature movement as cycles
Comparing Methods
- Time Series: Strong visual impact if change is substantial, shows condition at each date/time; Requires visual comparison of maps, difficult to read if many features/dates
- Trend: Shows overall direction of change (generally easier to read than a time series)
- Cycle: Shows repeating patterns of change
- Before and After: Shows actual amounts of change; Doesn't always show actual conditions at each time point
Methods to Use
- Time Series: Snapshots of map features over two or more times. Used to show features either moving or changing in character.
- Tracking Maps: Show movement of features over a period of time. Measuring change between locations
- Measuring Change: Shows calculated differences; Useful for comparing attributes over two or more time periods.
MCE Procedure
- Step 1: Establishing Context: Identify aims of decision makers, establishing a shared understanding of the problem.
- Step 2: Structuring: Identifying objectives, alternatives, and criteria; criteria should be specific, measurable attainable, relevant, and time-bound
- Step 3: Scoring Alternatives: Set/use common scale for suitability and comparisons. Fuzzy membership can be used to assign numerical values (range 0-100) reflecting likelihood of a location being suitable
- Step 4: Determine Weights: Ranking, ratings, and pairwise comparisons of criteria are used to assign relative importance to each component.
- Step 5: Evaluating Alternatives (Non-weighted or weighted Linear Combination): Non-weighted methods classify criteria based on good or bad (1 or 0); Weighted methods use geometric mean calculations to determine scores which may apply to multiple criteria.
- Step 6: Validation/Verification: Confirm sample areas through field surveys to verify results.
Sensitivity Analysis
- Assessing how changes in weights/criteria affect evaluation results.
GIS Packages
- Tools:
- ArcGIS (Decision Support Modules: fuzzy to standardize factors; Weights calculate actual evaluation; model builder)
- QGIS;
- Geoserver;
- Maps server.
- Other tools.
- WebGIS (architectural models, implementation of a modern GIS on web services, standard devices that derive data and connect components) can be implemented in the cloud, on premises, or hybrid
3D GIS
- 3D GIS maps illustrate objects in greater detail by adding another dimension
- Data:
- Feature data.
- Surface Data (DEM - raster representation; contour -familiar ways of representing surfaces)
- Tools: Creating contour lines, deriving new surfaces from a DEM, creating slope surfaces, creating hillshade surfaces, visibility analysis (viewshed tool) using GIS tools.
TINs (Triangular Irregular Networks)
- Form of vector-based digital geographic data
- Constructed by triangulating a set of vertices (points) creating network of triangles and used for interpolation
- GIS software supported
- GIS can create and show different types of surface models, including:
- Raster Data Sets
- TIN Data Sets
- LAS Data Sets
- Terrain data (functional surfaces).
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Description
This quiz explores various methods and concepts related to change mapping in geographic contexts. It focuses on evaluating transportation policies, understanding population changes over time, and the significance of mapping discrete events. Test your knowledge on the best practices for visualizing change in geographic features.