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  • Book Overview & Buying ArcPy and ArcGIS: Geospatial Analysis with Python
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ArcPy and ArcGIS: Geospatial Analysis with Python

ArcPy and ArcGIS: Geospatial Analysis with Python

By : Silas Toms
3.9 (11)
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ArcPy and ArcGIS: Geospatial Analysis with Python

ArcPy and ArcGIS: Geospatial Analysis with Python

3.9 (11)
By: Silas Toms
Buy this Book

Overview of this book

If you are a GIS student or professional who needs an understanding of how to use ArcPy to reduce repetitive tasks and perform analysis faster, this book is for you. It is also a valuable book for Python programmers who want to understand how to automate geospatial analyses.
Table of Contents (14 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Introduction to Python for ArcGIS
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1. Introduction to Python for ArcGIS
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Overview of Python
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Python as a programming language
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Important Python Modules for GIS Analysis
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Summary
2
2. Configuring the Python Environment
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2. Configuring the Python Environment
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What is a Python script?
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What is the Python interpreter?
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Make Python scripts executable when clicked on
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Integrated Development Environments (IDEs)
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Python folder structure
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The sys.path.append() method
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Summary
3
3. Creating the First Python Script
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3. Creating the First Python Script
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Prerequisites
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Creating a model and exporting to Python
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Exporting the model and adjusting the script
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File paths in Python
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Continuing the script analysis: the ArcPy tools
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Adjusting the Script
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Adding the CSV module to the script
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The final script
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Summary
4
4. Complex ArcPy Scripts and Generalizing Functions
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4. Complex ArcPy Scripts and Generalizing Functions
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Python functions–Avoid repeating code
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Summary
5
5. ArcPy Cursors – Search, Insert, and Update
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5. ArcPy Cursors – Search, Insert, and Update
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The data access module
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Inserting a polyline geometry
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Inserting a polygon geometry
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Summary
6
6. Working with ArcPy Geometry Objects
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6. Working with ArcPy Geometry Objects
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ArcPy geometry object classes
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Summary
7
7. Creating a Script Tool
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7. Creating a Script Tool
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Adding dynamic parameters to a script
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Creating a Script tool
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Inspecting the final script
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Summary
8
8. Introduction to ArcPy.Mapping
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8. Introduction to ArcPy.Mapping
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Using ArcPy with map documents
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Inspecting and replacing layer sources
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Automated map document adjustment
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Running the script in the Python Window
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Summary
9
9. More ArcPy.Mapping Techniques
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9. More ArcPy.Mapping Techniques
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Using arcpy.mapping to control Layer objects
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Definition queries
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Controlling the data frame window extent and scale
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Summary
10
10. Advanced Geometry Object Methods
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10. Advanced Geometry Object Methods
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Creating a Python module
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Adding advanced analysis components
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Summary
11
11. Network Analyst and Spatial Analyst with ArcPy
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11. Network Analyst and Spatial Analyst with ArcPy
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The Network Analyst extension
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Using Network Analyst
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The Network Analyst module
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Accessing the Spatial Analyst Extension
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The final result
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Summary
12
12. The End of the Beginning
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12. The End of the Beginning
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Getting field information from feature classes
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Summary
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Index
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Index

The final result

We produced a subset feature class of the bus stops that has the elevation values added as a field. This process could be repeated for the entire city, one neighborhood at a time, or it could be performed with the original elevation raster on the entire bus stops feature class to generate a value for each stop:

import arcpy
arcpy.CheckOutExtension("Spatial")
arcpy.env.overwriteOutput = True
busStops = r'C:\Projects\PacktDB.gdb\SanFrancisco\Bus_Stops'
sanFranciscoHoods = r'C:\Projects\SanFrancisco.gdb\SanFrancisco\SFFind_Neighborhoods'
sfElevation = r'C:\Projects\SanFrancisco.gdb\sf_elevation'

somaGeometry = []
sql = "name = 'South of Market'"
with arcpy.da.SearchCursor(sanFranciscoHoods,['SHAPE@XY'],sql,None, True) as cursor:
    for row in cursor:
        somaGeometry.append(arcpy.Point(row[0][0],row[0][1]))
somaElev = arcpy.sa.ExtractByPolygon(sfElevation, somaGeometry,"INSIDE")
somaOutput...

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