Geographic Information Systems - Querying and Analysis
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Questions and Answers

What is the fundamental principle of Overlay Analysis?

  • Compare the properties of the same location in both data layers. (correct)
  • Compare the properties of different locations in same data layer.
  • Merge two or more data layers into one layer.
  • Split one data layer into two or more layers.

    • What is a prerequisite for performing Overlay Analysis?

  • Data layers should have different properties.
  • Data layers should have different areas of interest.
  • Data layers should be in different coordinate systems.
  • Data layers should be in the same coordinate system. (correct)

    • Which of the following is NOT a type of Overlay Analysis?

  • Vector Overlay
  • Point Overlay (correct)
  • Raster Overlay
  • Polygon Overlay

    • What is the outcome of performing Overlay Analysis?

    <p>A new spatial data layer is created.</p> Signup and view all the answers

    What is a common application of Overlay Analysis?

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

    What is the purpose of the Point-in-Polygon Overlay?

    <p>To find the polygon in which a point falls within</p> Signup and view all the answers

    What is the benefit of using Overlay Analysis?

    <p>It helps in identifying relationships between different data layers.</p> Signup and view all the answers

    Which type of overlay analysis is used to find a line or lines that fall within a certain polygon?

    <p>Line-in-Polygon Overlay</p> Signup and view all the answers

    What is the output of the Union Overlay operation?

    <p>Polygons from both input layers</p> Signup and view all the answers

    What is the purpose of the Clip/Cookie-cutting Overlay operation?

    <p>To cut out the portion of a polygon layer that falls within another polygon</p> Signup and view all the answers

    What is the output of the Intersect Overlay operation?

    <p>The polygon of intersection of two polygon layers</p> Signup and view all the answers

    What is the name of the analysis that uses overlay operations to evaluate the suitability of different locations?

    <p>Suitability Analysis from Overlay</p> Signup and view all the answers

    What is the primary purpose of querying in a Geographic Information System?

    <p>To retrieve specific data from a database or analysis</p> Signup and view all the answers

    Which type of query is used to identify features that satisfy both spatial and aspatial criteria?

    <p>Combination query</p> Signup and view all the answers

    What is the result of using the XOR operator in a query?

    <p>All map units that have either one attribute OR another attribute but not both attributes together</p> Signup and view all the answers

    What is the purpose of buffering in proximity analysis?

    <p>To create a zone of interest around an entity</p> Signup and view all the answers

    What is the name of the method used to identify a target's zone of influence?

    <p>Thiessen Polygons</p> Signup and view all the answers

    What is the result of using the NOT operator in a query?

    <p>All map units that have one attribute but not another</p> Signup and view all the answers

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