Analytical Hierarchy Process Quiz
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Questions and Answers

What is the weight of "Conservation" in the first set of criteria?

  • 0.1
  • 0.15
  • 0.2 (correct)
  • 0.4
  • What is the weight of "Flood" in the third set of criteria?

  • 0.375
  • 0.18
  • 0.36
  • 0.125 (correct)
  • What is the overall summation of the weights for each set of criteria?

  • 1 (correct)
  • 1000
  • 100
  • 10
  • What is the purpose of dividing the cell value by its column total?

    <p>To normalize the values (B)</p> Signup and view all the answers

    In the formula for Consistency Index (CI), what does the variable "Amax" represent?

    <p>The maximum value from each normalized row of the matrix (C)</p> Signup and view all the answers

    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?

    <p>Measuring Change in Character (C)</p> Signup and view all the answers

    If you want to visually emphasize the impact of an event on a particular feature, which method would be most appropriate?

    <p>Before and After (B)</p> Signup and view all the answers

    What is the Consistency Ratio (CR) used to measure?

    <p>The consistency of the judgments relative to random judgments (C)</p> Signup and view all the answers

    Which method is best suited to show the movement of a feature over time, specifically using recurring patterns?

    <p>Tracking Map (A)</p> Signup and view all the answers

    What is the main benefit of using the Analytical Hierarchy Process (AHP)?

    <p>It provides a more structured approach for measuring suitability by breaking down the problem into hierarchical criteria. (D)</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a negative linear relationship between two variables?

    <p>The slope of the line is positive. (B)</p> Signup and view all the answers

    If you are analyzing the changing boundaries of a wildfire over time, which method would be most effective?

    <p>Time Series (C)</p> Signup and view all the answers

    What is a potential disadvantage of using a Time Series method to visualize changing character categories?

    <p>It can be difficult to see the patterns of change between maps if classification methods are different in each map. (A)</p> Signup and view all the answers

    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?

    <p>Time Series (A)</p> Signup and view all the answers

    When comparing the impact of an event using 'Before and After' visualization, which method would be most appropriate?

    <p>Before and After (D)</p> Signup and view all the answers

    Choosing to show fewer maps spaced farther apart in time primarily benefits which aspect of visualization?

    <p>Highlighting significant changes in values (D)</p> Signup and view all the answers

    What are the key components of a GIS-based Multi-Criteria Evaluation (MCE)?

    <p>Decision Alternatives, Criteria, Factors, Constraints, Decision Rule (C)</p> Signup and view all the answers

    Which of the following is NOT a key component of GIS-based MCE?

    <p>Data Analysis (B)</p> Signup and view all the answers

    Which of the following is an example of a constraint in a GIS-based MCE for a new business?

    <p>Protected area (E)</p> Signup and view all the answers

    Which of the following scenarios is a suitable application of a GIS-based MCE?

    <p>Choosing the best location for a new shopping mall (D)</p> Signup and view all the answers

    Which of the following can be used to calculate the area change between two dates in a GIS?

    <p>All of the above (D)</p> Signup and view all the answers

    How can we create a change map between two surfaces in a GIS?

    <p>By subtracting the layers (D)</p> Signup and view all the answers

    What does the term "Decision Rule" refer to in the context of GIS-based MCE?

    <p>A numerical method for prioritizing alternatives based on how well they satisfy the criteria (B)</p> Signup and view all the answers

    What is the main role of GIS in the MCE process?

    <p>GIS is used to collect and analyze data, evaluate alternatives and impacts, and present results to stakeholders. (A)</p> Signup and view all the answers

    Which of the following tools is used to determine the visibility of locations from a specific point?

    <p>Viewshed (A)</p> Signup and view all the answers

    What is the primary advantage of WebGIS compared to traditional GIS?

    <p>Ability to access and manipulate spatial data from any web-connected device. (B)</p> Signup and view all the answers

    Which of the following is NOT a commercial WebGIS software option?

    <p>Geoserver (D)</p> Signup and view all the answers

    Which of the following OGC standards enables the exchange of geographic features through web services?

    <p>WFS (A)</p> Signup and view all the answers

    What is the key difference between Google Maps and WebGIS?

    <p>WebGIS is specifically designed for professional GIS users, while Google Maps is geared towards the general public. (A)</p> Signup and view all the answers

    Which of the following cloud-based GIS platforms is NOT a suitable option for spatial analysis?

    <p>Google Maps (D)</p> Signup and view all the answers

    What is the primary purpose of a WebGIS portal?

    <p>To provide a centralized platform for sharing, accessing, and using GIS resources. (D)</p> Signup and view all the answers

    Which of the following best describes a key characteristic of WebGIS?

    <p>It allows for dynamic integration of multiple data sources and analytical tools. (C)</p> Signup and view all the answers

    Which of the following are NOT used for determining the results in a GIS-based MCDA?

    <p>Sensitivity analysis (A)</p> Signup and view all the answers

    What is a common approach to evaluating alternatives in a GIS-based MCDA?

    <p>Weighted Linear Combination (B)</p> Signup and view all the answers

    What does 'KISS' stand for in the context of MCDA?

    <p>Keep It Simple and Stupid (B)</p> Signup and view all the answers

    What is the purpose of 'standardization' in GIS-based MCDA?

    <p>To create a common scale for all criteria (B)</p> Signup and view all the answers

    Which of the following GIS packages offers decision support modules for MCDA?

    <p>Teerset (C)</p> Signup and view all the answers

    What is the primary advantage of using 3D GIS in MCDA?

    <p>To visualize the spatial relationships between criteria (D)</p> Signup and view all the answers

    Which of the following statements about GIS-based MCDA is TRUE?

    <p>It can be useful for addressing complex environmental issues (D)</p> Signup and view all the answers

    Which of the following is NOT a step in the GIS-based MCDA process?

    <p>Data mining (C)</p> Signup and view all the answers

    Which of the following is NOT a reason to map change?

    <p>To define the type of change based on the location of features (C)</p> Signup and view all the answers

    When mapping change in location, which of the following would NOT be considered a discrete feature?

    <p>A changing coastline (B)</p> Signup and view all the answers

    When mapping change in character or magnitude, what is NOT a common way to represent the data?

    <p>Discrete points (C)</p> Signup and view all the answers

    What type of change involves tracking the movement of geographic phenomena over time?

    <p>Change in location (B)</p> Signup and view all the answers

    What kind of data is BEST suited for mapping change in character or magnitude?

    <p>Data summarized by percentages (C)</p> Signup and view all the answers

    Which of the following best describes how change in location and change in character are related?

    <p>They can occur simultaneously and influence each other. (A)</p> Signup and view all the answers

    What information is crucial to determine the best method for mapping change?

    <p>The type of features being mapped. (D)</p> Signup and view all the answers

    What is the difference between tracking maps and time series maps?

    <p>Tracking maps show the movement of features over time, while time series maps show the change in character or magnitude of features within a defined area. (C)</p> Signup and view all the answers

    Flashcards

    Cycles

    Recurring patterns indicating behavior of features over time.

    Before and After Conditions

    Comparative states showing the impact of an event or change.

    Time Series

    Displays change over time with significant visual impact.

    Tracking Map

    Illustrates movement of features across recurring time periods.

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    Measure Change

    Shows calculated differences in feature attributes between two time periods.

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    Number of Maps to Show

    Strategy for displaying maps to highlight change patterns effectively.

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    Movement of Change

    Describes how features change or shift over time.

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    Character Change

    Refers to alterations in categories or classifications over time.

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    Change Map Creation

    A process to visualize changes by subtracting layers in GIS.

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    Layer Overlapping

    Combining two data layers to show differences.

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    Area Change Calculation

    Calculating the difference in area for various categories between dates.

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    Vector or Raster Data

    Data types used to calculate changes in GIS.

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    Decision Alternatives

    Options considered in GIS-Based Multicriteria Evaluation.

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    Criteria in MCE

    Guidelines or requirements that inform decision-making.

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    Constraints

    Limitations that restrict decision-making options.

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    Decision Rule

    A method to prioritize alternatives based on criteria fulfillment.

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    Geospatial Intelligence

    The use of geographic data to understand and analyze locations and conditions over time.

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    Why Map Change

    Mapping change provides insights to understand behavior, anticipate needs, decide actions, and evaluate results.

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    Types of Change

    Includes change in location and change in character or magnitude of features.

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    Discrete Features

    Features that can be tracked individually as they move through space.

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    Events

    Geographic phenomena occurring at different locations and can be mapped over time.

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    Measuring Time

    Analyzing changes over time through trends between dates.

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    Change in Character or Magnitude

    Refers to how features' types or associated quantities change within defined areas.

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    Negative Linear Relationship

    A relationship where one variable increases as the other decreases.

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    Pairwise Comparison

    A method of comparing each criterion against others to establish their importance.

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    Analytical Hierarchy Process (AHP)

    A structured technique for organizing and analyzing complex decisions based on mathematics and psychology.

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    Weight of Each Criterion

    The numerical importance assigned to each criterion on a normalized scale.

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    Normalization

    Adjusting values measured on different scales to a common scale, usually 0 to 1.

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    Consistency Ratio (CR)

    A measure to evaluate the consistency of the judgments made in AHP.

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    Benefits of AHP

    Provides a structured approach to decision-making with hierarchical breakdown of criteria.

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    Consistency Index (CI)

    A calculation to assess consistency, defined as (Amax-n) / (n-1).

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    AHP

    Analytic Hierarchy Process; involves experts in decision-making using quantitative and qualitative criteria.

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    Non-Weighted MCE

    Multi-Criteria Evaluation where criteria are simply classified as good (1) or bad (0).

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    Weighted Linear Combination (WLC)

    A decision-making method that combines multiple criteria with assigned weights to rank alternatives.

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    Sensitivity Analysis

    Examination of how changes in criteria or weights affect results in decision-making.

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    Criterion Maps

    Maps that represent the evaluation criteria in GIS-based MCE for analyzing alternatives.

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    Standardisation

    The process of converting different scales of criteria into a comparable format in MCE.

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    Weighting in MCE

    Assigning different importance levels to evaluation criteria, impacting final decisions.

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    GIS-Based MCDA

    Geographic Information System based Multicriteria Decision Analysis used for complex evaluations.

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    Hillshade Tool

    A tool that uses sun azimuth and altitude to illuminate a terrain surface, showing shadows and relief.

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    Viewshed

    An analysis that identifies which areas are visible from specific observer points on a raster surface.

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    WebGIS

    A modern GIS approach that uses web services to allow dynamic spatial data analysis and access.

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    GIS Portal

    A framework for sharing maps and data, enabling wider access for users and the public.

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    Commercial WebGIS Options

    Proprietary platforms for creating web-based GIS applications, like ArcGIS and Geomedia.

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    FOSS WebGIS Options

    Free and open-source platforms for web GIS like Geoserver and QGIS Server.

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    OGC Standards

    A set of standards like WMS and WFS that ensure interoperability of web-based GIS services.

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    GIS in the Cloud

    Platforms that provide GIS services hosted online, allowing access from anywhere.

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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.

    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.

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