Coordinate Systems and Location
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Questions and Answers

What is the primary purpose of a coordinate system?

  • To measure the elevation of a location
  • To determine the distance between two reference points
  • To establish positions with respect to given reference points (correct)
  • To create a virtual map

    • What is the science, art, and profession of determining the positions on the earth's surface?

  • Cartography
  • Geography
  • Navigation
  • Land surveying (correct)

    • What is a mental map?

  • A map data stored in a database
  • A physical map printed on paper
  • A digital map stored on a computer
  • An image in our minds (correct)

    • What is a neat line on a real map?

    <p>A narrow line that frames the mapped area</p> Signup and view all the answers

    What is the main difference between a real map and a virtual map?

    <p>The tangibility of the map</p> Signup and view all the answers

    What is necessary for satellite signals to reach GPS receivers?

    <p>A direct line of sight</p> Signup and view all the answers

    How many satellites are needed to calculate a 3D position?

    <p>Four satellites</p> Signup and view all the answers

    What is the purpose of a scale on a map?

    <p>To show the size features on a map in relation to the same features on the ground</p> Signup and view all the answers

    What does PDOP stand for?

    <p>Position Dilution of Precision</p> Signup and view all the answers

    What type of map shows the shape and elevation of terrain?

    <p>Topographic map</p> Signup and view all the answers

    What does HDOP measure?

    <p>The accuracy of a GPS reading in the horizontal plane</p> Signup and view all the answers

    What is the maximum DOP value at which data should be collected?

    <p>5</p> Signup and view all the answers

    What is the name of the line that joins the poles and specifies location in east-west direction?

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

    What is the purpose of an inset on a map?

    <p>To show the location of the map in a larger region</p> Signup and view all the answers

    What is considered an excellent DOP value?

    <p>2 or lower</p> Signup and view all the answers

    What type of map is used to show specialized information in conjunction with a basemap?

    <p>Thematic map</p> Signup and view all the answers

    What is the name of the circle on the surface of the globe that divides the Earth into two equal halves?

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

    What is the purpose of a graticule on a map?

    <p>To provide a grid pattern of meridians and parallels</p> Signup and view all the answers

    What is the most accurate shape of the Earth?

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

    What type of map is used to show statistical information in diagrammatic form?

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

    What is the purpose of longitude and latitude on a map?

    <p>To specify location in east-west and north-south directions</p> Signup and view all the answers

    What is the term for the study of the shapes and features of the earth's surface?

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

    Height above sea level would pertain to what term?

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

    What is the purpose of a benchmark?

    <p>To provide a point of reference for position and elevation</p> Signup and view all the answers

    What is the term for the lines on a map that connect regions of equal elevation?

    <p>Contour lines</p> Signup and view all the answers

    What map scale is the ratio of the distances measured on a map to the distances on the earth?

    <p>Representative fraction</p> Signup and view all the answers

    What is the formula to calculate the percent slope of a surface?

    <p>% slope = change of elevation/change of horizontal distance X 100</p> Signup and view all the answers

    What is the term for the systematic rendering of a graticule of lines of latitude and longitude on a flat surface?

    <p>Map projection</p> Signup and view all the answers

    What is the main purpose of a datum in GIS?

    <p>To provide a coordinate system for maps and surveys</p> Signup and view all the answers

    What is the term for the network of satellites orbiting the earth that provides accurate location and timing information?

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

    What is the purpose of an ephemeris in GPS?

    <p>To predict the location of GPS satellites</p> Signup and view all the answers

    A relative coordinate system defines locations by their distance from a reference point.

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

    A position is an informal way to describe a location.

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

    Land surveying is the science of determining the positions on the earth’s surface and measuring distances, directions, angles, and elevations between them.

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

    A virtual map is a tangible map product that has a permanent form and can be directly viewed.

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

    A typographical information is a component of a real map that includes the title, names, legends, and notes printed on the map.

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

    A choropleth map is a type of thematic map that represents values that occur on a surface by a series of lines that join points of equal value.

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

    A cartogram is a map that shows the shape and elevation of terrain.

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

    The graticule is a grid pattern of meridians and parallels that assumes a flat Earth.

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

    The equator is an example of a parallel.

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

    A planimetric map is a type of map that shows the shape and elevation of terrain.

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

    A bathymetric map is a type of thematic map that shows water depths and underwater topography.

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

    Latitude measures location in an east-west direction.

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

    A flow map is a type of thematic map that uses quantitative linear symbols to represent connections or flows between locations on the earth's surface.

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

    A geoid is a perfect sphere shape that represents the Earth's surface.

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

    A benchmark is a point that has been accurately measured for its position and elevation.

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

    A graphic scale is a text version of the map scale.

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

    The Lambert Conformal Conic Projection is used for small-scale topographic maps.

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

    A datum is a coordinate system that uses a reference surface, like sea level, to provide known locations for maps and surveys.

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

    GPS satellites use solar clocks for time determination.

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

    The Universal Transverse Mercator (UTM) uses latitude and longitude for navigation.

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

    A contour line is a line on a map that connects regions of different elevation.

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

    Map projections attempt to retain all characteristics of the globe.

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

    The Mercator projection is used for navigation because it provides a line of constant direction.

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

    GPS signals can penetrate thick tree canopy.

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

    Five satellites are needed to calculate a 3D position.

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

    A DOP value of 1 is considered poor.

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

    VDOP measures the accuracy of a GPS reading in the horizontal plane.

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

    Data should be collected above a DOP of 5.

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

    Satellite signals require a direct line of sight to GPS receivers.

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

    What obstacle can block GPS signals?

    <p>Water, soil, walls, and thick tree canopy</p> Signup and view all the answers

    What is the minimum number of satellites required to calculate a 3D position?

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

    What does PDOP stand for?

    <p>Position Dilution of Precision</p> Signup and view all the answers

    What is the range of DOP values?

    <p>1-10</p> Signup and view all the answers

    What is the recommended maximum DOP value for collecting data?

    <p>5</p> Signup and view all the answers

    What does VDOP measure?

    <p>The accuracy of a GPS reading in the vertical plane</p> Signup and view all the answers

    What is the purpose of trilateration in GPS?

    <p>To measure distance and calculate position</p> Signup and view all the answers

    What is an excellent DOP value?

    <p>2 or lower</p> Signup and view all the answers

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