Cartography and Projections Quiz
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Questions and Answers

What type of projection preserves angles but may distort area?

  • Cylindrical
  • Conformal (correct)
  • Equal-area
  • Azimuthal
  • A projection can simultaneously preserve both scale and direction.

    False (B)

    What is the purpose of UTM zones in mapping?

    To provide a systematic way of projecting the Earth's surface for accurate location and distance measurement.

    A __________ projection is analogous to wrapping a paper around the Earth in the shape of a cone.

    <p>conic</p> Signup and view all the answers

    Match the following map types with their primary focus:

    <p>Topography 250 = National outline planning Topography 100 = Transportation and land use Topography 50 = Terrain and physical planning</p> Signup and view all the answers

    What is a common use of equal-area projections?

    <p>Area calculations (B)</p> Signup and view all the answers

    Cylindrical projections can only be wrapped around the equator.

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

    In a Cartesian coordinate system, the coordinates are commonly referred to as __________ and __________.

    <p>easting and northing</p> Signup and view all the answers

    What is one purpose of a cartogram?

    <p>To distort area or distance for a specific objective (D)</p> Signup and view all the answers

    Map metadata includes data sources, projections, and the author's name.

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

    What is the scale of a map typically represented as?

    <p>A ratio, such as 1:5,000, or a scale bar.</p> Signup and view all the answers

    ___ is the process by which we turn raw data into useful information.

    <p>Spatial analysis</p> Signup and view all the answers

    Match the following components of a map with their descriptions:

    <p>Inset map = Shows the broader context of the main map Legend = Explains symbols used on the map Scale = Indicates the relationship between map distance and ground distance Direction indicator = Shows the orientation of the map (e.g., north arrow)</p> Signup and view all the answers

    Which symbol is NOT typically used in attribute mapping?

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

    Analytical cartography only applies to newly created datasets.

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

    Name one method of spatial analysis that involves no changes to the database.

    <p>Queries</p> Signup and view all the answers

    Which of the following is a catagory part in geographic problem?

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

    Geographic coordinates specifically refer to Earth’s (or any planetery) coordinate system.

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

    What is the term used to describe the analysis of information that refers to coordinates?

    <p>spatial</p> Signup and view all the answers

    A measure of the relationship between two random variables is known as _____ .

    <p>covariance</p> Signup and view all the answers

    Which category of geographic problems pertains to the "purpose" of the solution?

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

    The term 'spatiotemporal' refers to spatial progress over time.

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

    What aspect has dramatically increased machine power in relation to GIS?

    <p>hardware</p> Signup and view all the answers

    Match the following components of GIS with their roles:

    <p>Hardware = Machine power and capabilities Software = User application and development Network = Information sharing and communication Spatial analysis = Understanding relationships through coordinates</p> Signup and view all the answers

    What does data in GIS represent?

    <p>A digital representation of selected aspects of a specific area (C)</p> Signup and view all the answers

    The more data there is, the less effective GIS becomes.

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

    Name one of the divisions of people involved in GIS.

    <p>Functionality or Application</p> Signup and view all the answers

    What is one method of simplification used in GIS?

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

    Match the following GIS concepts with their definitions:

    <p>Datum = Singular form of data Geographic representation = Digital model of Earth's surface aspects Continuous fields = Represent infinite data continuously Discrete objects = Represent finite, distinct elements</p> Signup and view all the answers

    Continuous fields can represent a finite amount of data.

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

    What do geographic objects in GIS represent?

    <p>Dimensionality</p> Signup and view all the answers

    What type of map uses colors, shades, or patterns to represent data values associated with specific geographic areas?

    <p>Choropleth map (B)</p> Signup and view all the answers

    Isopleth maps represent nominal or ordinal scales.

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

    What is the primary use of a raster representation in geographic data?

    <p>to divide the world into arrays of cells and assign attribute values</p> Signup and view all the answers

    __________ are lines that join locations with the same value of a specific attribute.

    <p>Isopleths</p> Signup and view all the answers

    Match the following types of geographic representations to their characteristics:

    <p>Raster = Good for statistical inference and modeling Vector = Detailed and precise representation of curves with points Choropleth = Uses colors for thematic representation Isopleth = Represents data distribution with lines connecting equal values</p> Signup and view all the answers

    Which of the following is a characteristic of vector representation?

    <p>Represents geographic phenomena with high quality (B)</p> Signup and view all the answers

    Typical files used for vector representations include TIFF and JPG.

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

    What does a choropleth map typically require to ensure accurate comparisons between regions of different sizes?

    <p>standardized data values (e.g., percentages, rates, or ratios)</p> Signup and view all the answers

    What is the primary purpose of optimization techniques in spatial analysis?

    <p>To select ideal locations for objects based on criteria (D)</p> Signup and view all the answers

    The Great Circle metric is used to measure the distance between two points on a flat plane.

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

    What are spatial queries used for?

    <p>To ask questions about spatial and temporal relationships.</p> Signup and view all the answers

    ______ metrics provide the shortest distance between two points on a spherical globe.

    <p>Great Circle</p> Signup and view all the answers

    Match the following measurement types to their definitions:

    <p>Distance measurement = Straight line distance between two points on a flat plane Area measurement = Size of a land parcel Shape measure = Degree of contortedness relative to a circular shape Slope and aspect = Calculated from a grid of elevations</p> Signup and view all the answers

    Which user interface paradigm is used for articulating spatial queries?

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

    GIS tools provide fast and inaccurate measurements compared to manual measurements.

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

    What method is typically used to calculate slope in spatial analysis?

    <p>By comparing a point's elevation to that of its neighbors.</p> Signup and view all the answers

    Flashcards

    Geographic problems

    Problems involving location, either in the information or solutions.

    Geographic coordinates

    The coordinate system of Earth or any planetary system.

    Spatial

    Any coordinate system, with or without geographic dimensions.

    Spatiotemporal

    Spatial progress in time or vice versa.

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    Temporal change

    Difference across spatial snapshots taken over a timeline.

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    GIS Hardware

    Physical components of a Geographic Information System (GIS).

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    GIS Software

    Programs running on a GIS's hardware to manage and analyze data.

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    GIS Network

    GIS's connection to other systems for data exchange.

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    GIS Data

    Digital representation of specific Earth features for problem-solving or scientific purposes. Vital for GIS to function, with insufficient data hindering and abundant data aiding it.

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    GIS People

    Individuals responsible for designing, maintaining, supplying data, and interpreting results. They can focus on improving GIS functionality or applying it to solve real-world problems.

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    GIS Procedures

    Organizational structures and processes for managing GIS activities. Includes budgeting, quality control, and ensuring alignment with organizational goals.

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    Geographic Representation

    Digital model of Earth's features, simplified to handle limitations of computers. Requires leaving out details, since the world is infinitely complex.

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    Simplification Methods

    Techniques used to reduce the complexity of geographic data, generating different types. Includes generalization and discretization.

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    Generalization

    Simplifying features by merging, smoothing, or eliminating details, creating generalized representations. Useful for overall understanding and smaller scale maps.

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    Discretization

    Splitting continuous data into discrete categories, simplifying information through classifications. Useful for analyzing specific patterns and relationships.

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    Geographic Data Atom

    The basic building block of geographic data, linking a position in space and time with a descriptive property. It is the simplest unit of data in GIS.

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    Geographic Attributes

    Characteristics that describe a geographic object, like its type, size, or material. They can have different values, like "tilled" or "fallow" for arable land.

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    Choropleth Map

    A map that uses colors or shades to show the values of data associated with specific geographic areas, like countries or states.

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    Isopleth Map

    A map that draws lines connecting locations with the same value of a specific attribute, like temperature or elevation.

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    Raster Representation

    A way to store geographic data as a grid of cells, where each cell represents a specific location and has its own attribute value.

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    Vector Representation

    A way to store geographic data using points, lines, and polygons to represent features, where points are connected by lines or the shape is filled in.

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    Continuous Field

    A geographic phenomenon that varies smoothly across space, like temperature or elevation.

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    Isoline

    A line on a map connecting points with equal value, like on an isopleth map.

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    Representing Continuous Fields in Vectors

    Capturing the variation of a continuous field using lines or polygons in vector representation.

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    Map Body

    The central part of a map that displays the main geographic information or area of interest.

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    Inset Map

    A smaller map located within a larger map, providing context or showing a wider geographic area.

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    Map Legend

    A key that explains the symbols, colors, and patterns used on a map.

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    Map Scale

    The ratio between distances on a map and corresponding distances on the ground.

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    Attribute Mapping

    The process of associating graphic symbols on a map to specific data attributes or characteristics.

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    Cartogram Transformation

    A map that distorts area or distance to emphasize a specific attribute or pattern, making the map non-planimetric.

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    Spatial Analysis

    The process of examining and interpreting spatial data to extract meaningful information and patterns.

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    Analytical Cartography

    Methods of analysis that can be applied to maps to enhance their usefulness for scientific exploration or decision making.

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    Geodetic Datum

    A reference ellipsoid used to represent the Earth's shape for surveying and mapping. It is a mathematical model, not a physical surface, and defines a specific position for the Earth's rotational axis and origin point.

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    Geoid

    The equipotential surface of the Earth's gravity field, meaning it represents the average sea level extended globally. It is a more accurate representation of the Earth's surface compared to the geodetic datum.

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    Cartesian Coordinate System

    A two-dimensional system using orthogonal axes (x, y) to define the location of points on a flat surface. In mapping, the y-axis is usually aligned with geographic North.

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    Conformal Projection

    A map projection that preserves angles, meaning shapes are accurately represented at a local scale. This is important for navigation and accurate spatial analysis.

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    Equal-Area Projection

    A map projection that preserves area, meaning the relative sizes of features are accurately portrayed. This is useful for global scale mapping and calculations involving area.

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    Cylindrical Projection

    A projection where the Earth is represented as a cylinder. The most common type wraps the cylinder around the equator, resulting in a map with straight lines of longitude and curved lines of latitude.

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    Azimuthal Projection

    A projection where the Earth is represented as a flat plane, projecting points from a central point onto the plane. This creates a map that focuses on a specific area, with distortion increasing further away from the central point.

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    Conic Projection

    A projection where the Earth is represented as a cone, with the base of the cone touching a specified latitude circle. This creates a map with curved lines of longitude and straight lines of latitude.

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    Spatial Queries

    Questions that ask about geographic locations, relationships, changes, and patterns. They can range from simple 'Where is...?' to complex inquiries about spatial relationships.

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    WIMP Interface

    A graphical user interface (GUI) based on Windows, Icons, Menus, and Pointers. It's a common interface used in many computer programs.

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    Measurement of Distance

    Determining the distance between two points on a map. This can be done using various metrics, such as the Pythagorean metric for straight lines or the Great Circle metric for spherical globes.

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    Pythagorean Metric

    A metric used to calculate the straight-line distance between two points on a flat plane. It utilizes the Pythagorean theorem (a² + b² = c²) to find the distance.

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    Great Circle Metric

    A metric used to determine the shortest distance between two points on a spherical globe, like Earth. It calculates the distance along the arc of a great circle.

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    Slope and Aspect

    Measures calculated from a grid of elevations (digital elevation model), representing the steepness and direction of a terrain. They are calculated for each point in the grid.

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    Transformations (Spatial Analysis)

    Simple spatial analysis techniques that manipulate datasets by combining or comparing them to create new datasets and insights. They involve changes like shifts, rotations, projections, or scaling.

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    Shape Measures

    Metrics that capture the degree of contortedness (irregularity) of areas compared to a perfect circle. Higher values indicate more contorted shapes.

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    Study Notes

    Geographic Problems (Lecture 1)

    • Geographic problems involve location aspects, both in the information and solutions.
    • Examples include forest management (cutting, replanting, road construction) and national park accessibility.
    • Farmers also solve geographic problems by managing fertilizer application.
    • Scale is crucial in geographic problem-solving. It ranges from micro (crystal structure) to global (global warming).
    • Intent (purpose) can be practical (emergency, money), or curiosity-driven.
    • Time scale varies. Operational concerns smooth organization functioning, tactical deals with short term plans, and strategic addresses long-term goals.
    • Geographic problems complexity often blends the categories.

    Geographic Coordinates

    • Geographic coordinates refer to Earth's coordinate system or any planetary system.
    • Spatial coordinates encompass any coordinate system, including statistical spaces.
    • Earth's coordinate system is a subspace of general space.
    • Spatial coordinates have dimensions to define a location, resolution to detail, coordinate systems to represent locations(e.g. on Earth), and topology (direction, distance, size).
    • Spatial analysis deals with information using coordinates.

    Spatiotemporal

    • Spatiotemporal concerns spatial progress in time or vice versa.
    • Temporal changes are often measured by comparing spatial snapshots over time.
    • Changes over time are calculated as differences across snapshots.

    The Anatomy of GIS

    • GIS hardware is directly linked to rising machine power.
    • GIS software runs locally on user's devices.
    • Development of GIS hardware and software are linked.
    • GIS networks support the spreading of information and knowledge.
    • Data in GIS represents selected geographic areas and has a dynamic relationship (no data—no GIS work).
    • GIS often involves teams of people who design programs for users and design applications to solve problems.
    • Procedures ensure GIS activities are within budgets maintain quality.

    Geographic Representation

    • Representations involve digital models of aspects of the earth's surface.
    • Simplification is required because of computer limitations with infinite data.
    • Simplification methods include spatial averaging and constant attribute value utilization.
    • Discrete objects have well-defined boundaries and are countable (e.g., buildings, residents).
    • Continuous fields have measurable variables across the surface (e.g., elevation, temperature).
    • Vector fields show magnitude and direction, while scalar fields show magnitude alone.

    Geographic attributes

    • Nominal attributes have no rank, equidistance, or absolute zero. An example is a county.
    • Ordinal attributes have ranks but no equidistance or absolute zero (e.g., grades).
    • Interval attributes have ranks, equidistance, and no absolute zero (e.g., temperature).
    • Ratio attributes have ranks, equidistance, and an absolute zero (e.g., concentrations).
    • Cyclic attributes use a cyclic scale (e.g., angles, temperatures measured on a circle).

    Raster and Vectors

    • Raster: Dividing the world into cells and assigning values to each cell, used in remote sensing.
    • Raster is good at showing geographical phenomena and for statistical inference.
    • Vector: Represents curves through connections between points, and areas are represented by polygons.
    • Vector is useful in detailed and precise data representation in geographic phenomena.

    Projections by Model

    • Cylindrical: Wrapping a cylinder around Earth (normal or transverse).
    • Conic: Wrapping a cone around Earth (tangential).
    • Azimuthal: Touching Earth at a point.
    • Secant projections minimise distortions by allowing the projection plane to cut through Earth's surface.
    • Map projections are used to represent a 3-D surface with a 2-D map, thus projecting Earth's surface on a flat surface.

    The "Un-projected" Projection

    • Plate Carrée or Cylindrical Equidistant Projection.
    • Longitude as X, Latitude as Y.
    • Neither conformal nor equal area; it preserves distances at the equator but distorts greatly at the poles.

    Universal Transverse Mercator (UTM)

    • Cylindrical projection (wrapped around a cylinder wrapped through the poles.)
    • 60 zones, each 6 degrees wide, along lines of longitude.
    • UTM zones use meters for coordinates for better accuracy.

    Local Coordinate Systems

    • Swedish Triangulated Grid (RT90, SWEREF 99): Plane orthogonal, uses meters, follows a standard shape of the Earth.

    Converting Geo-references

    • GIS applications often involve converting projections and ellipsoids.
    • Street addresses need converting to coordinates for mapping.
    • Place names can be converted using gazetteers to get coordinates.

    Satellite-based Navigation and Positioning Systems (L5)

    • GPS (and other systems) are satellite-based systems.
    • GPS consists of three segments: space, control, and user.
    • Various GPS types have different accuracies and costs. These include: Absolute, Differential, and Single/Network-based Real-Time Kinematic (RTK).

    Equipment - Accuracy - Cost

    • Quality of equipment and methodology determines accuracy.
    • Cost of different methods is linked to accuracy.

    Electromagnetic Spectrum

    • Electromagnetic spectrum used in various remote sensing activities.
    • Increasing wavelength equates to decreasing energy (decreasing temperature)

    Spectral Reflectance

    • Reflectance varies with the wavelength and type of surface.
    • Instruments measure spectral reflectance for different wavelengths.

    Remote Sensing

    • Remote sensing utilizes reflected light and infrared to detect and measure landscapes and other phenomena.
    • Spectral bands are used to capture different wavelengths of light for various purposes in remote sensing.
    • Satellites used for remote sensng are listed in a table including satellite name, spectral bands, ground resolution (meters), type, and year.

    Cartography and Map Production (L6)

    • Cartography and creating maps using GIS.
    • Two types of formal maps are reference maps (e.g., topographic maps), and thematic maps (e.g., population census maps).

    Spatial Analysis

    • Spatial analysis is about turning raw data into information.
    • Methods for analysis cover queries, measurements, transformations, descriptive summaries, and hypothesis testing.

    Spatial Interpolation

    • Spatial interpolation estimates values at unobserved points based on observed points.
    • Common methods include Thiessen polygons, inverse-distance weighting (IDW), and Kriging.

    Descriptive Summaries, Optimization and Hypothesis Testing

    • Descriptive summaries capture geographic patterns and phenomena through simple statistics.
    • Optimisation in GIS deals with finding the best solutions (e.g., location, routes).
    • Hypothesis testing uses statistical methods to test ideas and make conclusions.

    Optimization

    • Optimization in GIS analyses patterns for creating better designs.
    • The objectives might include minimal travel time or costs.
    • Optimization approaches may include minimizing aggregate travel distance.

    Statistical Inference and Hypothesis Testing

    • Statistical methods for estimating uncertainty in continuous surfaces (accounting for autocorrelations).
    • Non-parametric approaches may be needed for hypothesis testing when covariance is not a feature of the data.

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    Description

    Test your knowledge on cartography and map projections with this quiz. It covers various projection types, their properties, and the purpose of UTM zones. Additionally, discover the functions of different map types and spatial analysis methods.

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