Proposing New Greenmarkets in New York City
Skills tutorials to support the three-part exercise.
Part 1: Raster Analysis, Map Algebra, & Introducing Multi-Criteria Decision Analysis
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See the Projection and CRS Basics page, which collects several tutorials related to changing map projection, reprojecting data, and defining a dataset’s projection.
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In ArcGIS Pro, see Geoprocessing Extents.
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In ArcGIS Pro, see Plotting X,Y Coordinates.
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For ArcGIS Pro, see Creating Euclidean Distance Rasters from Vector Inputs. (Warning: this tool will soon be retired.)
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For a refresher of Symbology and Classification (for rasters and vectors) in ArcGIS Pro, see this page which includes a collection of tutorials on the topic.
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For a review of the Reclassification tool in ArcGIS Pro, including different examples, see Reclassifying Rasters.
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For a description of ArcGIS’s Extract by Mask tool, see Extracting Rasters with a Vector Mask Layer.
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For refreshers on querying techniques, including creating a new feature class from selected features, see Basic Queries and Selections in ArcGIS Pro.
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For a description of the Raster Calculator in ArcGIS Pro (with several examples), see Using the Raster Calculator for Map Algebra.
Part 2: Network Analysis
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For refreshers on querying techniques, including creating a new feature class from selected features, see Basic Queries and Selections in ArcGIS Pro.
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To create (and build) a network dataset from a prepared polyline file in ArcGIS, you need these three skills:
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ArcGIS uses “Analysis Layers” to contain the various inputs and outputs of network analyses. I strongly recommend reading through the Working with Network Analysis Layers tutorial before proceeding through the other steps. The list of relevant tutorials (in order) are…
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The Service Area (from Layer) tool in QGIS only processes one distance threshold at a time. As a result, I’m adding the tutorial for batch processing in QGIS for your reference.
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You will need to choose an approach for constructing bounding geometry polygons from your Service Area points and/or lines. See:
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If you need a refresher on performing table joins in ArcGIS, see this Table Joins tutorial.
The FAQs page also has tips under Tables & Table Joins.
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For a reminder on dissolving features based on attributes, see the Dissolving Features tutorial.
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In ArcGIS Pro: For a reminder on adding and calculating fields in your attribute table, see this tutorial on Adding & Calculating Fields in an Attribute Table.
Also, see this page of Common Field Calculations.
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The exercise specifically suggests a combination of Union and Spatial Join to sum different base scores in places with overlapping service areas.
Union (ArcGIS Pro from Esri; QGIS documentation)
Spatial Joins (ArcGIS Pro; QGIS)
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Converting between vector features and raster datasets is a straightforward operation in most GIS software. For a review in ArcGIS, see Converting Vector Features to Rasters (the process is the same in QGIS).
Part 3: Spatial Statistics
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If you need a refresher on performing table joins in ArcGIS, see this Table Joins tutorial.
The FAQs page also has tips under Tables & Table Joins.
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In ArcGIS Pro, see Clipping Features.
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In ArcGIS Pro, see Adding and Calculating Fields in an Attribute Table and Calculating Geometry Attributes of Vector Features. The website also maintains a list of Common Field Calculations.
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In ArcGIS Pro, see Using the Hotspot Analysis tool for Getis-Ord Gi* test tutorial.
For QGIS, see Oxoli and Prestifilippo (2021) Hotspot Analysis plugin.
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For information on Esri’s tool in ArcGIS Pro (called “Cluster and Outlier Analysis”), see here.
In QGIS, the Oxoli & Prestifilippo (2021) Hotspot Analysis plugin will run the test (mentioned above). The Local Moran’s I is also available in the Spatial Analysis Toolbox plugin (Delialis, 2022).