This is the era of Big Data and computational social science. It is an era that requires tools which can do more than visualise data but also model the complex relation between data and human action, and interaction. Agent-Based Models (ABM) - computational models which simulate human action and interaction – do just that. This textbook explains how to design and build ABM and how to link the models to Geographical Information Systems. It guides you from the basics through to constructing more complex models which work with data and human behaviour in a spatial context. All of the fundamental concepts are explained and related to practical examples to facilitate learning (with models developed in NetLogo with all code examples available on the accompanying website). You will be able to use these models to develop your own applications and link, where appropriate, to Geographical Information Systems. All of the key ideas and methods are explained in detail: • geographical modelling; • an introduction to ABM; • the fundamentals of Geographical Information Science; • why ABM and GIS; • using QGIS; • designing and building an ABM; • calibration and validation; • modelling human behaviour; • visualisation and 3D ABM; • using Big Geosocial Data, GIS and ABM. An applied primer, that provides fundamental knowledge and practical skills, it will provide you with the skills to build and run your own models, and to begin your own research projects.

Building Agent-Based Models with Netlogo

Building Agent-Based Models with Netlogo

Chapter Outline

This chapter provides an overview of the programming language and concepts that are used within NetLogo (Wilensky, 1999). NetLogo basics, such as how to create a simple environment, commands and procedures, are presented with step-by-step instructions for creating a simple model. Following this basic model, more advanced features are introduced. The overall aim of this chapter is to provide an understanding of the main components that make a NetLogo program. Subsequent chapters build upon the basics presented here.

4.1 Introduction

NetLogo (Wilensky, 1999) was developed at the Center for Connected Learning and Computer-Based Modeling at Northwestern University and uses a dialect of the Logo language to create agent-based models (while NetLogo itself is written in Scala ...

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