Programming ArcGIS 10.1 with Python Cookbook

Reading XML files

Creating ZIP files

Retrieving files from an FTP server

Sending e-mails

Reading data from a delimited text file

Introduction

Appendix B. Five Things Every GIS Programmer Should Know How to Do with Python

Scheduling batch files to run at prescribed times

Adding Python scripts to batch files

Using sys.argv[ ] to capture command-line input

Running Python scripts from the command line

Introduction

Appendix A. Automating Python Scripts

Returning individual messages with GetMessage()

Testing for and responding to specific error messages

Filtering tool messages by severity level

Retrieving tool messages with GetMessages()

Adding Python exception handling structures (try/except/finally)

Exploring the default Python error message

Introduction

Chapter 12. Error Handling and Troubleshooting

Creating a tool add-in

Installing and testing an add-in

Creating a button add-in

Downloading and installing the Python Add-In wizard

Introduction

Chapter 11. Customizing the ArcGIS Interface with Add-Ins

Returning workspace information with the Describe() function

Using the Describe() function to return descriptive information about an image

Using the Describe() function to return descriptive information about a feature class

Getting a list of fields in a feature class or table

Restricting the list of feature classes returned with a feature type.

Restricting the list of feature classes returned with a wildcard

Getting a list of feature classes in a workspace

Introduction

Chapter 10. Listing and Describing GIS Data

Reading geometry from a feature class

Inserting and updating rows inside an edit session

Deleting rows with an UpdateCursor

Updating rows with an UpdateCursor

Inserting rows with InsertCursor

Improving cursor performance with geometry tokens

Filtering records with a where clause

Retrieving features from a feature class with a SearchCursor

Introduction

Chapter 9. Using the ArcPy Data Access Module to Select Insert and Update Geographic Data and Tables

Combining a spatial and attribute query with the Select by Location tool

Selecting features with the Select by Location tool

Selecting features and rows with the Select Layer by Attribute tool

Creating feature layers and table views

Constructing proper attribute query syntax

Introduction

Chapter 8. Querying and Selecting Data

Creating a custom geoprocessing tool

Introduction

Chapter 7. Creating Custom Geoprocessing Tools

Setting environment variables and examining tool messages

Using the output of a tool as an input to another tool

Executing geoprocessing tools from a script

Retrieving a toolbox alias

Finding geoprocessing tools

Introduction

Chapter 6. Executing Geoprocessing Tools from Scripts

Creating a map book with PDFDocumentCreate() and PDFDocumentOpen()

Exporting a map to an image file

Exporting a map to a PDF file

Printing maps with PrintMap()

Getting a list of available printers

Updating layout element properties

Restricting the layout elements returned by ListLayoutElements()

Assigning a unique name to layout elements

Creating a list of layout elements

Introduction

Chapter 5. Automating Map Production and Printing

Finding all broken data sources in all map documents in a folder

Fixing individual Layer and Table objects with replaceDataSource()

Fixing broken data sources with MapDocument.replaceWorkspaces()

Fixing broken data sources with MapDocument.findAndReplaceWorkspacePaths()

Finding broken data sources in your map document and layer files

Introduction

Chapter 4. Finding and Fixing Broken Data Links

Updating layer properties

Updating layer symbology

Inserting layers into a map document

Adding layers to a map document

Getting a list of tables

Changing the map extent

Restricting the list of layers

Getting a list of layers in a map document

Accessing a data frame

Referencing map documents on a disk

Referencing the current map document

Introduction

Chapter 3. Managing Map Documents and Layers

Accessing ArcPy modules with Python

Using variables to store data

Using ArcGIS Desktop help

Executing tools from a script

Accessing ArcPy with Python

Using the ArcGIS Python window

Introduction

Chapter 2. Writing Basic Geoprocessing Scripts with ArcPy

Summary

Python language fundamentals

Using IDLE for Python script development

Chapter 1. Fundamentals of the Python Language for ArcGIS

Customer support

Reader feedback

Conventions

Who this book is for

What you need for this book

What this book covers

Preface

Support files eBooks discount offers and more

www.PacktPub.com

About the Reviewers

About the Author

Credits

Programming ArcGIS 10.1 with Python Cookbook

coverpage

coverpage

Programming ArcGIS 10.1 with Python Cookbook

Credits

About the Author

About the Reviewers

www.PacktPub.com

Support files eBooks discount offers and more

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Chapter 1. Fundamentals of the Python Language for ArcGIS

Using IDLE for Python script development

Python language fundamentals

Summary

Chapter 2. Writing Basic Geoprocessing Scripts with ArcPy

Introduction

Using the ArcGIS Python window

Accessing ArcPy with Python

Executing tools from a script

Using ArcGIS Desktop help

Using variables to store data

Accessing ArcPy modules with Python

Chapter 3. Managing Map Documents and Layers

Introduction

Referencing the current map document

Referencing map documents on a disk

Accessing a data frame

Getting a list of layers in a map document

Restricting the list of layers

Changing the map extent

Getting a list of tables

Adding layers to a map document

Inserting layers into a map document

Updating layer symbology

Updating layer properties

Chapter 4. Finding and Fixing Broken Data Links

Introduction

Finding broken data sources in your map document and layer files

Fixing broken data sources with MapDocument.findAndReplaceWorkspacePaths()

Fixing broken data sources with MapDocument.replaceWorkspaces()

Fixing individual Layer and Table objects with replaceDataSource()

Finding all broken data sources in all map documents in a folder

Chapter 5. Automating Map Production and Printing

Introduction

Creating a list of layout elements

Assigning a unique name to layout elements

Restricting the layout elements returned by ListLayoutElements()

Updating layout element properties

Getting a list of available printers

Printing maps with PrintMap()

Exporting a map to a PDF file

Exporting a map to an image file

Creating a map book with PDFDocumentCreate() and PDFDocumentOpen()

Chapter 6. Executing Geoprocessing Tools from Scripts

Introduction

Finding geoprocessing tools

Retrieving a toolbox alias

Executing geoprocessing tools from a script

Using the output of a tool as an input to another tool

Setting environment variables and examining tool messages

Chapter 7. Creating Custom Geoprocessing Tools

Introduction

Creating a custom geoprocessing tool

Chapter 8. Querying and Selecting Data

Introduction

Constructing proper attribute query syntax

Creating feature layers and table views

Selecting features and rows with the Select Layer by Attribute tool

Selecting features with the Select by Location tool

Combining a spatial and attribute query with the Select by Location tool

Chapter 9. Using the ArcPy Data Access Module to Select Insert and Update Geographic Data and Tables

Introduction

Retrieving features from a feature class with a SearchCursor

Filtering records with a where clause

Improving cursor performance with geometry tokens

Inserting rows with InsertCursor

Updating rows with an UpdateCursor

Deleting rows with an UpdateCursor

Inserting and updating rows inside an edit session

Reading geometry from a feature class

Chapter 10. Listing and Describing GIS Data

Introduction

Getting a list of feature classes in a workspace

Restricting the list of feature classes returned with a wildcard

Restricting the list of feature classes returned with a feature type.

Getting a list of fields in a feature class or table

Using the Describe() function to return descriptive information about a feature class

Using the Describe() function to return descriptive information about an image

Returning workspace information with the Describe() function

Chapter 11. Customizing the ArcGIS Interface with Add-Ins

Introduction

Downloading and installing the Python Add-In wizard

Creating a button add-in

Installing and testing an add-in

Creating a tool add-in

Chapter 12. Error Handling and Troubleshooting

Introduction

Exploring the default Python error message

Adding Python exception handling structures (try/except/finally)

Retrieving tool messages with GetMessages()

Filtering tool messages by severity level

Testing for and responding to specific error messages

Returning individual messages with GetMessage()

Appendix A. Automating Python Scripts

Introduction

Running Python scripts from the command line

Using sys.argv[ ] to capture command-line input

Adding Python scripts to batch files

Scheduling batch files to run at prescribed times

Appendix B. Five Things Every GIS Programmer Should Know How to Do with Python

Introduction

Reading data from a delimited text file

Sending e-mails

Retrieving files from an FTP server

Creating ZIP files

Reading XML files