Podcast
Questions and Answers
What is the weight of "Conservation" in the first set of criteria?
What is the weight of "Conservation" in the first set of criteria?
What is the weight of "Flood" in the third set of criteria?
What is the weight of "Flood" in the third set of criteria?
What is the overall summation of the weights for each set of criteria?
What is the overall summation of the weights for each set of criteria?
What is the purpose of dividing the cell value by its column total?
What is the purpose of dividing the cell value by its column total?
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In the formula for Consistency Index (CI), what does the variable "Amax" represent?
In the formula for Consistency Index (CI), what does the variable "Amax" represent?
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What method is most suitable for showing the change in a feature's location or magnitude between two time periods without showing the actual conditions for each date/time?
What method is most suitable for showing the change in a feature's location or magnitude between two time periods without showing the actual conditions for each date/time?
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If you want to visually emphasize the impact of an event on a particular feature, which method would be most appropriate?
If you want to visually emphasize the impact of an event on a particular feature, which method would be most appropriate?
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What is the Consistency Ratio (CR) used to measure?
What is the Consistency Ratio (CR) used to measure?
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Which method is best suited to show the movement of a feature over time, specifically using recurring patterns?
Which method is best suited to show the movement of a feature over time, specifically using recurring patterns?
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What is the main benefit of using the Analytical Hierarchy Process (AHP)?
What is the main benefit of using the Analytical Hierarchy Process (AHP)?
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Which of the following is NOT a characteristic of a negative linear relationship between two variables?
Which of the following is NOT a characteristic of a negative linear relationship between two variables?
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If you are analyzing the changing boundaries of a wildfire over time, which method would be most effective?
If you are analyzing the changing boundaries of a wildfire over time, which method would be most effective?
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What is a potential disadvantage of using a Time Series method to visualize changing character categories?
What is a potential disadvantage of using a Time Series method to visualize changing character categories?
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Which method is best for visualizing a trend in an attribute's magnitude over time, even if the actual values at each point are not critical?
Which method is best for visualizing a trend in an attribute's magnitude over time, even if the actual values at each point are not critical?
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When comparing the impact of an event using 'Before and After' visualization, which method would be most appropriate?
When comparing the impact of an event using 'Before and After' visualization, which method would be most appropriate?
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Choosing to show fewer maps spaced farther apart in time primarily benefits which aspect of visualization?
Choosing to show fewer maps spaced farther apart in time primarily benefits which aspect of visualization?
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What are the key components of a GIS-based Multi-Criteria Evaluation (MCE)?
What are the key components of a GIS-based Multi-Criteria Evaluation (MCE)?
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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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Which of the following is an example of a constraint in a GIS-based MCE for a new business?
Which of the following is an example of a constraint in a GIS-based MCE for a new business?
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Which of the following scenarios is a suitable application of a GIS-based MCE?
Which of the following scenarios is a suitable application of a GIS-based MCE?
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Which of the following can be used to calculate the area change between two dates in a GIS?
Which of the following can be used to calculate the area change between two dates in a GIS?
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How can we create a change map between two surfaces in a GIS?
How can we create a change map between two surfaces in a GIS?
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What does the term "Decision Rule" refer to in the context of GIS-based MCE?
What does the term "Decision Rule" refer to in the context of GIS-based MCE?
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What is the main role of GIS in the MCE process?
What is the main role of GIS in the MCE process?
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Which of the following tools is used to determine the visibility of locations from a specific point?
Which of the following tools is used to determine the visibility of locations from a specific point?
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What is the primary advantage of WebGIS compared to traditional GIS?
What is the primary advantage of WebGIS compared to traditional GIS?
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Which of the following is NOT a commercial WebGIS software option?
Which of the following is NOT a commercial WebGIS software option?
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Which of the following OGC standards enables the exchange of geographic features through web services?
Which of the following OGC standards enables the exchange of geographic features through web services?
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What is the key difference between Google Maps and WebGIS?
What is the key difference between Google Maps and WebGIS?
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Which of the following cloud-based GIS platforms is NOT a suitable option for spatial analysis?
Which of the following cloud-based GIS platforms is NOT a suitable option for spatial analysis?
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What is the primary purpose of a WebGIS portal?
What is the primary purpose of a WebGIS portal?
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Which of the following best describes a key characteristic of WebGIS?
Which of the following best describes a key characteristic of WebGIS?
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Which of the following are NOT used for determining the results in a GIS-based MCDA?
Which of the following are NOT used for determining the results in a GIS-based MCDA?
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What is a common approach to evaluating alternatives in a GIS-based MCDA?
What is a common approach to evaluating alternatives in a GIS-based MCDA?
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What does 'KISS' stand for in the context of MCDA?
What does 'KISS' stand for in the context of MCDA?
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What is the purpose of 'standardization' in GIS-based MCDA?
What is the purpose of 'standardization' in GIS-based MCDA?
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Which of the following GIS packages offers decision support modules for MCDA?
Which of the following GIS packages offers decision support modules for MCDA?
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What is the primary advantage of using 3D GIS in MCDA?
What is the primary advantage of using 3D GIS in MCDA?
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Which of the following statements about GIS-based MCDA is TRUE?
Which of the following statements about GIS-based MCDA is TRUE?
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Which of the following is NOT a step in the GIS-based MCDA process?
Which of the following is NOT a step in the GIS-based MCDA process?
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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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When mapping change in location, which of the following would NOT be considered a discrete feature?
When mapping change in location, which of the following would NOT be considered a discrete feature?
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When mapping change in character or magnitude, what is NOT a common way to represent the data?
When mapping change in character or magnitude, what is NOT a common way to represent the data?
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What type of change involves tracking the movement of geographic phenomena over time?
What type of change involves tracking the movement of geographic phenomena over time?
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What kind of data is BEST suited for mapping change in character or magnitude?
What kind of data is BEST suited for mapping change in character or magnitude?
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Which of the following best describes how change in location and change in character are related?
Which of the following best describes how change in location and change in character are related?
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What information is crucial to determine the best method for mapping change?
What information is crucial to determine the best method for mapping change?
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What is the difference between tracking maps and time series maps?
What is the difference between tracking maps and time series maps?
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Flashcards
Cycles
Cycles
Recurring patterns indicating behavior of features over time.
Before and After Conditions
Before and After Conditions
Comparative states showing the impact of an event or change.
Time Series
Time Series
Displays change over time with significant visual impact.
Tracking Map
Tracking Map
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Measure Change
Measure Change
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Number of Maps to Show
Number of Maps to Show
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Movement of Change
Movement of Change
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Character Change
Character Change
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Change Map Creation
Change Map Creation
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Layer Overlapping
Layer Overlapping
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Area Change Calculation
Area Change Calculation
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Vector or Raster Data
Vector or Raster Data
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Decision Alternatives
Decision Alternatives
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Criteria in MCE
Criteria in MCE
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Constraints
Constraints
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Decision Rule
Decision Rule
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Geospatial Intelligence
Geospatial Intelligence
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Why Map Change
Why Map Change
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Types of Change
Types of Change
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Discrete Features
Discrete Features
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Events
Events
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Measuring Time
Measuring Time
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Change in Character or Magnitude
Change in Character or Magnitude
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Negative Linear Relationship
Negative Linear Relationship
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Pairwise Comparison
Pairwise Comparison
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Analytical Hierarchy Process (AHP)
Analytical Hierarchy Process (AHP)
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Weight of Each Criterion
Weight of Each Criterion
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Normalization
Normalization
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Consistency Ratio (CR)
Consistency Ratio (CR)
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Benefits of AHP
Benefits of AHP
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Consistency Index (CI)
Consistency Index (CI)
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AHP
AHP
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Non-Weighted MCE
Non-Weighted MCE
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Weighted Linear Combination (WLC)
Weighted Linear Combination (WLC)
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Sensitivity Analysis
Sensitivity Analysis
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Criterion Maps
Criterion Maps
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Standardisation
Standardisation
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Weighting in MCE
Weighting in MCE
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GIS-Based MCDA
GIS-Based MCDA
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Hillshade Tool
Hillshade Tool
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Viewshed
Viewshed
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WebGIS
WebGIS
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GIS Portal
GIS Portal
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Commercial WebGIS Options
Commercial WebGIS Options
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FOSS WebGIS Options
FOSS WebGIS Options
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OGC Standards
OGC Standards
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GIS in the Cloud
GIS in the Cloud
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Study Notes
Geospatial Intelligence: Test Notes
- GIS lets you map where things move or change. Knowing how things change over time helps understand conditions.
- Understanding changes helps anticipate future conditions & evaluate results of actions.
- Topics:
- Why map change?
- Defining your analysis (3 ways to map change)
- Creating time-series maps
- Creating tracking maps
- Measuring and mapping change
- Gaining insight into how things behave
- Anticipating future conditions/needs
- Evaluating course of action (conditions before/after)
- Defining your analysis
- Map change by showing location of features at each date to calculate difference in value for each feature on more dates.
- Why map change?
Types of Change
- Change in location (helps where/how features move and predict)
- Change in character or magnitude (how conditions have changed in a given place—type of feature or quantity associated with a feature)
Measuring Time
- Time patterns (trends between two or more dates/times—indicate increases or decreases in something or directions of movement)
- Cycles (showing recurring patterns revealing information about behavior of features)
- Before/after conditions (allow viewing impact of an event)
Comparing Methods
- Methods:
- Time series (strong visual if substantial change, but harder to view subtle changes over periods)
- Trends (easier to view movement and change, but requires visualization comparisons of maps)
- Cycle (before/after—shows actual change and amounts)
- Time patterns: identifying trends and cycles
- Use of time maps to visualize conditions/data by comparison.
What Method to Use?
- Time series: snapshots for two or more times, or showing changes in character
- Tracking map: showing movement over time periods
- Measuring change: showing calculated difference in an attribute of a place between time periods
Number of Maps to Show
- Fewer maps farther in time: easier to see values
- More maps closer together in time: reveals patterns that are missed when using fewer maps
- Difficult to compare over 5-6 maps
Mapping Individual Features
- Tracking features: emphasizing paths by drawing short lines to connect each feature at different time intervals—helps visualize movement between features
- Showing magnitude of change using different colors or symbols
Mapping Contiguous Features
- To map contiguous features, draw the boundaries of the feature's area over time, shading areas in different patterns.
Measuring Change
- Data summarized by each area shows change in value
- Create bar charts (showing areas values)
- Insert charts in areas to compare multiple time periods
Negative Values
- Representing negative change values (attributes have decreased in value)
Calculating Change in Continuous Categories
- Different layers, data from each time point to be analyzed for changes
- Calculate changes, create maps showing areas of change, calculating quantity of changes between categories.
WebGIS
- WebGIS is a pattern/architectural approach for implementing a modern GIS powered by web services
- Delivering data and connecting components
- Can be implemented in the cloud, on premises, or hybrid configurations
- Transforms GIS data to bring analytics to spatial data, answer questions dynamically, increasing flexibility/agility.
WebGIS Options
- Commercial (e.g., ArcGIS Enterprise, Esri, SuperMap)
- Open Source (e.g., GeoServer, MapServer)
- Standards (e.g., OGC WMS, WFS, Web Coverage Service, Web Feature Service) GIS in the cloud, Mapbox, Google Maps, Bing Maps, Google My Maps
GIS-Based Multicriteria Evaluation (MCE)
- Introduction: Selecting best locations for businesses/infrastructure is a complex process involving stakeholders
- Key components: Decision alternatives, criteria (guidelines/factors), constraints
- Decision rule: Numerical method for prioritizing alternatives based on how well they meet criteria (in example—riparian vegetation management)
- Performance matrix: determines values based on facts/stakeholder judgment (0-1 scale)
- Weights: Reflect stakeholder judgments
Methods of MCE
- 6 step-procedure:
- Establish decision context
- Structure decision problem
- Score alternatives (common scale, fuzzy memberships)
- Determine criteria weights
- Evaluate alternatives
- Validate results
- Step 3: Scoring alternatives related to each criterion, establishing suitability scales.
- Step 4: Determining the weight of each criterion
- Step 5: Evaluating alternatives; non-weighted RICE, weighted linear, combination
- Step 6: Validating/verifying results (ground truth survey)
Sensitivity Analysis and GIS-based MCDA
- Sensitivity analysis: assess impact of factors altering criteria/weights
- GIS-Based Multi Criteria Decision Analysis (MCDA): evaluating criteria (e.g., standardisation/weighting) to quantify overall score
- Provides suitability maps
Remarks
- GIS-based MCE is good for complex scenarios.
- Subjectivity in deciding criteria/weights
- KISS (Keep it simple and stupid)
- Models are interpreted with caution
- Validation increases the credibility of results
- Additional GIS packages: ArcGIS with model builder/tools, QGIS, Python
3D GIS
- Maps objects in detail by including another dimension (e.g., elevation of objects)
- Data for elevation, represented as features, or as surface data (e.g, DEMs)
TINs
- Form of vector based digital data (triangulating points in a network)
- Interpolations form triangles, used for distance-calculating algorithms (e.g. Delaunay Triangulation)
- ArcGIS supported data sets
Visibility Analysis
- Determined by using the viewshed tool for discovering visible objects from a certain location in a raster GIS.
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Description
This quiz covers key concepts related to the Analytical Hierarchy Process (AHP), including criteria weights, consistency indices, and methods for visualizing changes over time. Test your knowledge of the principles and applications of AHP in decision-making processes, particularly in environmental contexts.