Discover Qgis 3x

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Discover QGIS 3.x - Second Edition: A Workbook for Classroom Or Independent Study

Author : Kurt Menke
Publisher : Locate Press
ISBN 13 : 9780986805257
Total Pages : 0 pages
Book Rating : 4.8/5 (52 download)

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Book Synopsis Discover QGIS 3.x - Second Edition: A Workbook for Classroom Or Independent Study by : Kurt Menke

Download or read book Discover QGIS 3.x - Second Edition: A Workbook for Classroom Or Independent Study written by Kurt Menke and published by Locate Press. This book was released on 2022-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the latest Long Term Release (LTR) of QGIS with Discover QGIS 3.x, a comprehensive up-to-date workbook built for both the classroom and professionals looking to build their skills. Designed to take advantage of the latest QGIS features, this book will guide you in improving your maps and analyses. The second edition is an update of the original title, using QGIS 3.24+. It contains 31 chapters covering an Introduction to Geospatial Technology, Spatial Analysis, Data Management, Cartography and Advanced Data Visualization. All 31 chapters have been updated with new figures of each GUI, more thorough descriptions and new QGIS features and workflows. The second edition includes: Seven brand new chapters: Raster Data Analysis Field Data Collection Using the Style Manager & Working with Legend Patch Shapes Automating Print Layouts with Templates and Atlases Working with Labels and Annotation Animating Temporal Data with the Temporal Controller Working with Point Cloud Data Another seven chapters with major updates including new tasks. Updated appendices covering: Coordinate reference systems Keyboard shortcuts Popular plugins Getting involved The book is a complete resource and includes: Lab exercises Challenge exercises Discussion questions All data and solution files

Discover QGIS 3.x

Author : Kurt Menke
Publisher : Locate Press
ISBN 13 : 9780998547763
Total Pages : 406 pages
Book Rating : 4.5/5 (477 download)

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Book Synopsis Discover QGIS 3.x by : Kurt Menke

Download or read book Discover QGIS 3.x written by Kurt Menke and published by Locate Press. This book was released on 2019-04-29 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the latest Long Term Release (LTR) of QGIS with Discover QGIS 3.x, a comprehensive up-to-date workbook built for both the classroom and professionals looking to build their skills. Designed to take advantage of the latest QGIS features, this book will guide you in improving your maps and analysis. Discover QGIS 3.x is an update of the original title, using QGIS 3.6, covering Spatial analysis, Data management, and Cartography. What's new in this edition: Fifteen new exercises A new section, Advanced Data Visualization, covering: Blending modes Live layer effects Geometry generators Rendering Points Time Manager Native 3D Mesh data Appendices covering: Keyboard shortcuts Useful Plugins Getting involved The book is a complete resource and includes: Lab exercises Challenge exercises All data, discussion questions, and solutions

Discover Qgis: Part 1 - Introduction to Geospatial Technology

Author : Kurt Menke
Publisher :
ISBN 13 : 9780989421775
Total Pages : 104 pages
Book Rating : 4.4/5 (217 download)

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Book Synopsis Discover Qgis: Part 1 - Introduction to Geospatial Technology by : Kurt Menke

Download or read book Discover Qgis: Part 1 - Introduction to Geospatial Technology written by Kurt Menke and published by . This book was released on 2016-10-20 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is Part 1 of Discover QGIS: Introduction to Geospatial Technology. Topics include spatial data models, displaying geospatial data, creating geospatial data, understanding remote sensing /analysis, and basic geospatial analysis techniques. This book provides an excellent introduction to GIS using the premier open source application---QGIS.

Discover QGIS

Author : Kurt Menke
Publisher :
ISBN 13 : 9780989421768
Total Pages : 470 pages
Book Rating : 4.4/5 (217 download)

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Book Synopsis Discover QGIS by : Kurt Menke

Download or read book Discover QGIS written by Kurt Menke and published by . This book was released on 2016 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get your hands on the award winning GeoAcademy exercises in a convenient workbook format. The GeoAcademy is the first ever GIS curriculum based on a national standard--the U.S. Department of Labor's Geospatial Competency Model--a hierarchical model of the knowledge, skills, and abilities needed to work as a GIS professional in today's marketplace.Originally written for QGIS v2.4, the GeoAcademy material in this workbook has been updated for use with QGIS 2.14, Inkscape 0.91, and GRASS GIS 7.0.3. This is the most up-to-date version of the GeoAcademy curriculum. To aid in learning, all exercise data includes solution files.The workbook is edited by one of the lead GeoAcademy authors, Kurt Menke, a highly experienced FOSS4G educator.

Learn QGIS

Author : Andrew Cutts
Publisher : Packt Publishing Ltd
ISBN 13 : 1788998863
Total Pages : 268 pages
Book Rating : 4.7/5 (889 download)

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Book Synopsis Learn QGIS by : Andrew Cutts

Download or read book Learn QGIS written by Andrew Cutts and published by Packt Publishing Ltd. This book was released on 2018-11-27 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn to view, edit and analyse geospatial data using QGIS and Python 3 Key FeaturesLeverage the power of QGIS to add professionalism to your mapsExplore and work with the newly released features like Python 3, GeoPackage, 3D views, Print layouts in QGIS 3.4Build your own plugins and customize maps using QT designerBook Description QGIS 3.4 is the first LTR (long term release) of QGIS version 3. This is a giant leap forward for the project with tons of new features and impactful changes. Learn QGIS is fully updated for QGIS 3.4, covering its processing engine update, Python 3 de-facto coding environment, and the GeoPackage format. This book will help you get started on your QGIS journey, guiding you to develop your own processing pathway. You will explore the user interface, loading your data, editing, and then creating data. QGIS often surprises new users with its mapping capabilities; you will discover how easily you can style and create your first map. But that’s not all! In the final part of the book, you’ll learn about spatial analysis and the powerful tools in QGIS, and conclude by looking at Python processing options. By the end of the book, you will have become proficient in geospatial analysis using QGIS and Python. What you will learnExplore various ways to load data into QGISUnderstand how to style data and present it in a mapCreate maps and explore ways to expand themGet acquainted with the new processing toolbox in QGIS 3.4Manipulate your geospatial data and gain quality insightsUnderstand how to customize QGIS 3.4Work with QGIS 3.4 in 3DWho this book is for If you are a developer or consultant familiar with the basic functions and processes of GIS and want to learn how to use QGIS to analyze geospatial data and create rich mapping applications, this book is for you. You’ll also find this book useful if you’re new to QGIS and wish to grasp its fundamentals

Mastering QGIS

Author : Kurt Menke, GISP
Publisher : Packt Publishing Ltd
ISBN 13 : 1786463628
Total Pages : 486 pages
Book Rating : 4.7/5 (864 download)

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Book Synopsis Mastering QGIS by : Kurt Menke, GISP

Download or read book Mastering QGIS written by Kurt Menke, GISP and published by Packt Publishing Ltd. This book was released on 2016-09-30 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Go beyond the basics and unleash the full power of QGIS with practical, step-by-step examples About This Book This book is your one-stop solution to all of your GIS needs using the open source QGIS Master QGIS by learning about database integration, geoprocessing tools, Python scripts, advanced cartography, and custom plugins This example-rich, practical guide will help you create sophisticated analyses and maps Who This Book Is For If you are a GIS professional, a consultant, a student, or perhaps a fast learner who wants to go beyond the basics of QGIS, then this book is for you. It will prepare you to realize the full potential of QGIS. What You Will Learn Create and manage a spatial database Get to know advanced techniques to style GIS data Prepare both vector and raster data for processing Add heat maps, live layer effects, and labels to your maps Master LAStools and GRASS integration with the Processing Toolbox Edit and repair topological data errors Automate workflows with batch processing and the QGIS Graphical Modeler Integrate Python scripting into your data processing workflows Develop your own QGIS plugin In Detail QGIS is an open source solution to GIS. It is widely used by GIS professionals all over the world. It is the leading alternative to the proprietary GIS software. Although QGIS is described as intuitive, it is also by default complex. Knowing which tools to use and how to apply them is essential to producing valuable deliverables on time. Starting with a refresher on the QGIS basics, this book will take you all the way through to creating your first custom QGIS plugin. From the refresher, we will recap how to create, populate, and manage a spatial database. You'll also walk through styling GIS data, from creating custom symbols and color ramps to using blending modes. In the next section, you will discover how to prepare vector, heat maps, and create live layer effects, labeling, and raster data for processing. You'll also discover advanced data creation and editing techniques. The last third of the book covers the more technical aspects of QGIS such as using LAStools and GRASS GIS's integration with the Processing Toolbox, how to automate workflows with batch processing, and how to create graphical models. Finally, you will see how to create and run Python data processing scripts and write your own QGIS plugin with pyqgis. By the end of the book, you will understand how to work with all the aspects of QGIS, and will be ready to use it for any type of GIS work. Style and approach This step-by-step comprehensive guide will let you dig your teeth into working with spatial databases, creating your own QGIS plugins, and creating your own custom graphical models.

Mastering QGIS - Second Edition

Author : Kurt Menke
Publisher :
ISBN 13 : 9781786460370
Total Pages : 486 pages
Book Rating : 4.4/5 (63 download)

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Book Synopsis Mastering QGIS - Second Edition by : Kurt Menke

Download or read book Mastering QGIS - Second Edition written by Kurt Menke and published by . This book was released on 2016-09-30 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Go beyond the basics and unleash the full power of QGIS with practical, step-by-step examplesAbout This Book- This book is your one-stop solution to all of your GIS needs using the open source QGIS- Master QGIS by learning about database integration, geoprocessing tools, Python scripts, advanced cartography, and custom plugins- This example-rich, practical guide will help you create sophisticated analyses and mapsWho This Book Is ForIf you are a GIS professional, a consultant, a student, or perhaps a fast learner who wants to go beyond the basics of QGIS, then this book is for you. It will prepare you to realize the full potential of QGIS.What You Will Learn- Create and manage a spatial database- Get to know advanced techniques to style GIS data- Prepare both vector and raster data for processing- Add heat maps, live layer effects, and labels to your maps- Master LAStools and GRASS integration with the Processing Toolbox- Edit and repair topological data errors- Automate workflows with batch processing and the QGIS Graphical Modeler- Integrate Python scripting into your data processing workflows- Develop your own QGIS pluginIn DetailQGIS is an open source solution to GIS. It is widely used by GIS professionals all over the world. It is the leading alternative to the proprietary GIS software. Although QGIS is described as intuitive, it is also by default complex. Knowing which tools to use and how to apply them is essential to producing valuable deliverables on time.Starting with a refresher on the QGIS basics, this book will take you all the way through to creating your first custom QGIS plugin. From the refresher, we will recap how to create, populate, and manage a spatial database. You'll also walk through styling GIS data, from creating custom symbols and color ramps to using blending modes. In the next section, you will discover how to prepare vector, heat maps, and create live layer effects, labeling, and raster data for processing. You'll also discover advanced data creation and editing techniques.The last third of the book covers the more technical aspects of QGIS such as using LAStools and GRASS GIS's integration with the Processing Toolbox, how to automate workflows with batch processing, and how to create graphical models. Finally, you will see how to create and run Python data processing scripts and write your own QGIS plugin with pyqgis.By the end of the book, you will understand how to work with all the aspects of QGIS, and will be ready to use it for any type of GIS work.Style and approachThis step-by-step comprehensive guide will let you dig your teeth into working with spatial databases, creating your own QGIS plugins, and creating your own custom graphical models.

Mastering Geospatial Development with QGIS 3. X

Author : Shammunul Islam
Publisher :
ISBN 13 : 9781788999892
Total Pages : 466 pages
Book Rating : 4.9/5 (998 download)

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Book Synopsis Mastering Geospatial Development with QGIS 3. X by : Shammunul Islam

Download or read book Mastering Geospatial Development with QGIS 3. X written by Shammunul Islam and published by . This book was released on 2019-03-28 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Go beyond the basics and unleash the full power of QGIS 3.4 and 3.6 with practical, step-by-step examples Key Features One-stop solution to all of your GIS needs Master QGIS by learning about database integration, and geoprocessing tools Learn about the new and updated Processing toolbox and perform spatial analysis Book Description QGIS is an open source solution to GIS and widely used by GIS professionals all over the world. It is the leading alternative to proprietary GIS software. Although QGIS is described as intuitive, it is also, by default, complex. Knowing which tools to use and how to apply them is essential to producing valuable deliverables on time. Starting with a refresher on the QGIS basics and getting you acquainted with the latest QGIS 3.6 updates, this book will take you all the way through to teaching you how to create a spatial database and a GeoPackage. Next, you will learn how to style raster and vector data by choosing and managing different colors. The book will then focus on processing raster and vector data. You will be then taught advanced applications, such as creating and editing vector data. Along with that, you will also learn about the newly updated Processing Toolbox, which will help you develop the advanced data visualizations. The book will then explain to you the graphic modeler, how to create QGIS plugins with PyQGIS, and how to integrate Python analysis scripts with QGIS. By the end of the book, you will understand how to work with all aspects of QGIS and will be ready to use it for any type of GIS work. What you will learn Create and manage a spatial database Get to know advanced techniques to style GIS data Prepare both vector and raster data for processing Add heat maps, live layer effects, and labels to your maps Master LAStools and GRASS integration with the Processing Toolbox Edit and repair topological data errors Automate workflows with batch processing and the QGIS Graphical Modeler Integrate Python scripting into your data processing workflows Develop your own QGIS plugins Who this book is for If you are a GIS professional, a consultant, a student, or perhaps a fast learner who wants to go beyond the basics of QGIS, then this book is for you. It will prepare you to realize the full potential of QGIS.

Learning QGIS

Author : Anita Graser
Publisher : Packt Publishing Ltd
ISBN 13 : 1785888153
Total Pages : 210 pages
Book Rating : 4.7/5 (858 download)

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Book Synopsis Learning QGIS by : Anita Graser

Download or read book Learning QGIS written by Anita Graser and published by Packt Publishing Ltd. This book was released on 2016-03-10 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest guide to using QGIS 2.14 to create great maps and perform geoprocessing tasks with ease About This Book Learn how to work with various data and create beautiful maps using this easy-to-follow guide. Give a touch of professionalism to your maps both for functionality and look and feel with the help of this practical guide. A progressive hands-on guide that builds on a geo-spatial data and adds more reactive maps by using geometry tools. Who This Book Is For This book is great for users, developers, and consultants who know the basic functions and processes of GIS and want to learn to use QGIS to analyze geospatial data and create rich mapping applications. If you want to take advantage of the wide range of functionalities that QGIS offers, then this is the book for you. What You Will Learn Install QGIS and get familiar with the user interface Load vector and raster data from files, databases, and web services Create, visualize, and edit spatial data Perform geoprocessing tasks and automate them Create advanced cartographic outputs Design great print maps Expand QGIS using Python In Detail QGIS is a user-friendly open source geographic information system (GIS) that runs on Linux, Unix, Mac OS X, and Windows. The popularity of open source geographic information systems and QGIS in particular has been growing rapidly over the last few years. Learning QGIS Third Edition is a practical, hands-on guide updated for QGIS 2.14 that provides you with clear, step-by-step exercises to help you apply your GIS knowledge to QGIS. Through clear, practical exercises, this book will introduce you to working with QGIS quickly and painlessly. This book takes you from installing and configuring QGIS to handling spatial data to creating great maps. You will learn how to load and visualize existing spatial data and create data from scratch. You will get to know important plugins, perform common geoprocessing and spatial analysis tasks and automate them with Processing. We will cover how to achieve great cartographic output and print maps. Finally, you will learn how to extend QGIS using Python and even create your own plugin. Style and approach A step by step approach to explain concepts of Geospatial map with the help of real life examples

QGIS for Hydrological Applications - Second Edition

Author : Hans Van Der Kwast
Publisher :
ISBN 13 : 9780986805233
Total Pages : 184 pages
Book Rating : 4.8/5 (52 download)

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Book Synopsis QGIS for Hydrological Applications - Second Edition by : Hans Van Der Kwast

Download or read book QGIS for Hydrological Applications - Second Edition written by Hans Van Der Kwast and published by . This book was released on 2022-06-13 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn GIS skills for catchment hydrology and water management with QGIS for Hydrological Applications!This updated, second edition, workbook teaches GIS and applies the state of the art functionality of QGIS 3.x for hydrological applications.

Qgis Map Design

Author : Anita Graser
Publisher :
ISBN 13 : 9780998547749
Total Pages : 210 pages
Book Rating : 4.5/5 (477 download)

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Book Synopsis Qgis Map Design by : Anita Graser

Download or read book Qgis Map Design written by Anita Graser and published by . This book was released on 2018-11-20 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Learn how to use QGIS 3 to take your cartographic products to the highest level. QGIS 3.4 opens up exciting new possibilities for creating beautiful and compelling maps! Building on the first edition, the authors take you step-by-step through the process of using the latest map design tools and techniques in QGIS 3. With numerous new map designs and completely overhauled workflows, this second edition brings you up to speed with current cartographic technology and trends. See how QGIS continues to surpass the cartographic capabilities of other geoware available today with its data-driven overrides, flexible expression functions, multitudinous color tools, blend modes, and atlasing capabilities. A prior familiarity with basic QGIS capabilities is assumed. All example data and project files are included. Written by two of the leading experts in the realm of open source mapping, Anita and Gretchen are experienced authors who pour their wealth of knowledge into the book. Get ready to launch into the next generation of map design!

Introduction to QGIS

Author : Scott Madry
Publisher : Locate Press
ISBN 13 : 9781734464306
Total Pages : 224 pages
Book Rating : 4.4/5 (643 download)

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Book Synopsis Introduction to QGIS by : Scott Madry

Download or read book Introduction to QGIS written by Scott Madry and published by Locate Press. This book was released on 2021-05-17 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Get started with QGIS with this introduction covering everything needed to get you going. This tutorial, based on the 3.16 LTR version, introduces you to major concepts and techniques to get you started with viewing data, analysis, and creating maps and reports. With this book you'll learn about: The QGIS interface Creating, editing, and analyzing vector data Working with raster (image) data Using plugins The QGIS Processing Toolbox Georeferencing Creating map and reports Resources for further help and study The book includes a link to all the data you'll need to follow along with each chapter.

QGIS Python Programming Cookbook - Second Edition

Author : Joel Lawhead
Publisher :
ISBN 13 : 9781787124837
Total Pages : 393 pages
Book Rating : 4.1/5 (248 download)

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Book Synopsis QGIS Python Programming Cookbook - Second Edition by : Joel Lawhead

Download or read book QGIS Python Programming Cookbook - Second Edition written by Joel Lawhead and published by . This book was released on 2017-03-31 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 140 recipes to help you turn QGIS from a desktop GIS tool into a powerful automated geospatial frameworkAbout This Book* Delve into the undocumented features of the new QGIS processing module* Get a set of user-friendly recipes that can automate the entire geospatial workflows by connecting Python GIS building blocks into comprehensive processes* This book has a complete code upgrade to QGIS 2.18 and 30 new, valuable recipesWho This Book Is ForThis book is for geospatial analysts who want to learn more about automating everyday GIS tasks as well as programmers responsible for building GIS applications. The short, reusable recipes make concepts easy to understand and combine so you can build larger applications that are easy to maintain.What You Will Learn* Use Python and QGIS to produce captivating GIS visualizations and build complex map layouts* Find out how to effectively use the poorly-documented and undocumented features of the QGIS Python API* Automate entire geospatial workflows by connecting Python GIS building blocks into comprehensive processes* Create, import, and edit geospatial data on disk or in-memory* Change QGIS settings programmatically to control default behavior* Automatically generate PDF map books* Build dynamic forms for field inputIn DetailQGIS is a desktop geographic information system that facilitates data viewing, editing, and analysis. Paired with the most efficient scripting language-Python, we can write effective scripts that extend the core functionality of QGIS.Based on the latest version QGIS 2.18, this book will teach you how to write Python code that works with spatial data to automate geoprocessing tasks in QGIS. It will cover topics such as querying and editing vector data and using raster data. You will also learn to create, edit, and optimize a vector layer for faster queries, reproject a vector layer, reduce the number of vertices in a vector layer without losing critical data, and convert a raster to a vector. Following this, you will work through recipes that will help you compose static maps, create heavily customized maps, and add specialized labels and annotations. As well as this, we'll also share a few tips and tricks based on different aspects of QGIS.

QGIS Python Programming Cookbook

Author : Joel Lawhead
Publisher : Packt Publishing Ltd
ISBN 13 : 1783984996
Total Pages : 340 pages
Book Rating : 4.7/5 (839 download)

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Book Synopsis QGIS Python Programming Cookbook by : Joel Lawhead

Download or read book QGIS Python Programming Cookbook written by Joel Lawhead and published by Packt Publishing Ltd. This book was released on 2015-03-26 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you are a geospatial analyst who wants to learn more about automating everyday GIS tasks or a programmer who is responsible for building GIS applications,this book is for you. The short, reusable recipes make concepts easy to understand. You can build larger applications that are easy to maintain when they are put together.

Developments and Advances in Defense and Security

Author : Álvaro Rocha
Publisher : Springer
ISBN 13 : 9811391556
Total Pages : 534 pages
Book Rating : 4.8/5 (113 download)

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Book Synopsis Developments and Advances in Defense and Security by : Álvaro Rocha

Download or read book Developments and Advances in Defense and Security written by Álvaro Rocha and published by Springer. This book was released on 2019-06-13 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the proceedings of the Multidisciplinary International Conference of Research Applied to Defense and Security (MICRADS), held at the Military Engineering Institute, Rio de Janeiro, Brazil, from 8 to 10th May 2019. It covers a variety of topics in systems, communication and defense; strategy and political-administrative vision in defense; and engineering and technologies applied to defense. Given its scope, it offers a valuable resource for practitioners, researchers, and students alike.

Global Innovation Index 2020

Author : Cornell University
Publisher : WIPO
ISBN 13 : 2381920005
Total Pages : 448 pages
Book Rating : 4.3/5 (819 download)

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Book Synopsis Global Innovation Index 2020 by : Cornell University

Download or read book Global Innovation Index 2020 written by Cornell University and published by WIPO. This book was released on 2020-08-13 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Global Innovation Index 2020 provides detailed metrics about the innovation performance of 131 countries and economies around the world. Its 80 indicators explore a broad vision of innovation, including political environment, education, infrastructure and business sophistication. The 2020 edition sheds light on the state of innovation financing by investigating the evolution of financing mechanisms for entrepreneurs and other innovators, and by pointing to progress and remaining challenges – including in the context of the economic slowdown induced by the coronavirus disease (COVID-19) crisis.

The Ultimate Challenge

Author : Jeffrey C. Lagarias
Publisher : American Mathematical Soc.
ISBN 13 : 0821849409
Total Pages : 362 pages
Book Rating : 4.8/5 (218 download)

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Book Synopsis The Ultimate Challenge by : Jeffrey C. Lagarias

Download or read book The Ultimate Challenge written by Jeffrey C. Lagarias and published by American Mathematical Soc.. This book was released on 2010 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: The $3x 1$ problem, or Collatz problem, concerns the following seemingly innocent arithmetic procedure applied to integers: If an integer $x$ is odd then ""multiply by three and add one"", while if it is even then ""divide by two"". The $3x 1$ problem asks whether, starting from any positive integer, repeating this procedure over and over will eventually reach the number 1. Despite its simple appearance, this problem is unsolved. Generalizations of the problem are known to be undecidable, and the problem itself is believed to be extraordinarily difficult. This book reports on what is known on this problem. It consists of a collection of papers, which can be read independently of each other. The book begins with two introductory papers, one giving an overview and current status, and the second giving history and basic results on the problem. These are followed by three survey papers on the problem, relating it to number theory and dynamical systems, to Markov chains and ergodic theory, and to logic and the theory of computation. The next paper presents results on probabilistic models for behavior of the iteration. This is followed by a paper giving the latest computational results on the problem, which verify its truth for $x