GGR321 - Quiz 1 + 2 questions

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31 Terms

1
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ModelBuilder is used to create, edit, and manage geoprocessing models that automate tools. It can also be thought of as a visual programming language for building workflows. True or False?

True

2
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Variables

Are elements in a model that hold a value or a reference to data. 2 types: data and value variables

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Geoprocessing tools

Perform various operations on geographic or tabular data

4
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Groups

Are visual elements that group related tools together, can collapse or expand

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Connectors

Connect data and values to tools, arrows show direction of processing. 4 types; data, environment, precondition, and feedback

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<p><span>In the example of biodiversity conservation model discussed in class, the 'Vegetation' element is&nbsp;</span></p>

In the example of biodiversity conservation model discussed in class, the 'Vegetation' element is 

Input data,

Derived Data

Derived Value

Input Value

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... are special ModelBuilder-only tools that repeat the same operation or loop through a set of input data or values. 

Iterators

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Data Models

templates for data, a framework into which specific details of relevant aspects of the Earth’s surface can be fitted. It is a statement about how the world looks

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Spatial Models

expressions of how the world is believed to work, how tasks are broken down in a sequence of operations; in other words they are expressions of process

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Mammoth Cave protection model developed with application of ModelBuilder discussed in class and described in the recommended reading materials is an example of geospatial modelling for forest protection, T or F

False

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All GIS transformations of rasters can be classified into four basic classes,

Local

examines rasters cell by cell

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Focal

compares the values of each cell with its neighbours

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Zonal

computes results for blocks of contiguous cells that share the same value

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Global

Produces results that are true of the entire layer

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Spatial models can be expressed visually as a flowchart (ModelBuilder) or as a script (Python, ArcPy) - True or False?

True, any model actually can be expressed as both

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Cellular models represent the surface of the Earth as a combination of vector objects - True or False?

False

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Multicriteria Decision Making (MCDM) is commonly used when stakeholders have different views on the weights of various factors, especially when modeling decisions related to environmental impacts and when decisions are controversial. T or F?

True, used when decisions are controversial

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Which three of the following statements correspond to Raster Data Models?

  1. Support the use of map algebra functions

  2. Allow to conduct visibility (viewshed) analysis

  3. Cannot effectively display linear features

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Euclidean distance global operations assign to each cell in the output raster dataset its distance from the closest source cell. Tor F?

True

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Line of sight analysis

essentially a point-to-point operation

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Viewshed analysis

Is typically a point or point set to surface operation

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Viewsheds are regions of visibility observable from one or more observation points. Typically the inputs for viewshed analysis include:

 

  1. a surface raster or set of raster files

  2. one or more observation points

  3. offset values for the observation points

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Which two extensions from the ArcGIS Pro Advanced Analysis products are the most suitable to conduct visibility and least-cost path analysis ?

  1. 3D Analyst

  2. Spatial Analyst

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The Least-Cost Analysis creates Euclidean distance surfaces to understand the straight-line distance from one location to another, or creates cost-weighted distance surfaces to understand the cost of getting from one location to another based on a set of input criteria. T or F?

True

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Python as a cross-platform open-source programming language was created and developed by ____________ in late 1980s, Netherlands  

Guido van Rossum

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Scripting language

automating certain functionality within another program

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Programming language

development of sophisticated multifunctional applications

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A strength of Python is that it is:

both a scripting language and a programming language

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A key feature of Python is that it

is interpreted; does not need conversion (binary code) before running it

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ArcPy

a Python site package that provides a useful and productive way to perform geographic data analysis, data conversion, data management, and map automation.

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Based on Python demo example in Lecture 6, please, fill out the text box below with a short script in ArcPy to run the Get Count geoprocessing tool located in the Data Management Tools toolbox for ambulances layer.

arcpy.management.GetCount("ambulances")

arcpy.management.GetCount('ambulances')