Spatial Selection by Attribute Conditions Quiz

A condition that tests a single criterion using a predictive symbol.

Ranking > MinRanking + 5

Using logical connectives like AND, OR, and NOT.

<p>If one or both of the expressions a and b is true.</p> Signup and view all the answers

<p>To return true if the expression is false.</p> Signup and view all the answers

<p>Selecting one or more selection objects.</p> Signup and view all the answers

<p>The purpose of the <code>Raster2 := Raster1 * 5</code> operation is to multiply the cell values in <code>Raster1</code> by 5 and store the result in <code>Raster2</code>.</p> Signup and view all the answers

<p>The <code>AND</code> operator returns true if both input cells are true, the <code>OR</code> operator returns true if either input cell is true, the <code>NOT</code> operator returns the opposite boolean value of the input cell, and the <code>XOR</code> (exclusive OR) operator returns true if either input cell is true, but not both.</p> Signup and view all the answers

<p>A conditional expression in raster overlay operations tests a condition, and if the condition is true, the <code>then_expression</code> is evaluated, otherwise the <code>else_expression</code> is evaluated. The format is: <code>output_raster := IFF(condition, then_expression, else_expression)</code>. This allows for complex decision-making and value assignment in the output raster based on the input raster values.</p> Signup and view all the answers

<p>Decision tables are an alternative way to express the same logic as a conditional expression. They list all possible combinations of input values and the corresponding output values. Decision tables and conditional expressions achieve the same result, but decision tables present the logic in a more structured, tabular format.</p> Signup and view all the answers

<p>The <code>Clip by</code> vector overlay operation is used to cut out a portion of a vector layer based on the extent of another vector layer. It acts like a cookie cutter, removing the parts of the first layer that fall outside the boundaries of the second layer.</p> Signup and view all the answers

<p>The <code>Intersection</code> vector overlay operation creates a new layer containing only the features that overlap between the two input layers. The <code>Overwrite by</code> operation replaces the features in the first layer with the features from the second layer, based on spatial overlap.</p> Signup and view all the answers

<p>The main types of raster overlay techniques discussed in the text are: using arithmetic operators, comparison and logical operators, conditional expressions, and decision table.</p> Signup and view all the answers

<p>According to the text, comparison and logical operators only evaluate to true and false.</p> Signup and view all the answers

<p>The text states that conditional expressions and decision table lead to the same result.</p> Signup and view all the answers

<p>The three main topics discussed are: 1) Neighborhood functions, 2) Network analysis, and 3) Error propagation.</p> Signup and view all the answers

<p>According to the text, to perform neighborhood analysis, you must: 1) State which target locations are of interest, 2) Define how to determine the neighborhood for each target, and 3) Define which characteristic(s) must be computed for each neighborhood.</p> Signup and view all the answers

<p>The three types of neighborhood functions discussed are: 1) Proximity computation, 2) Spread computation, and 3) Seek computation.</p> Signup and view all the answers