Book Image

ArcGIS for Desktop Cookbook

By : Daniela C Docan
Book Image

ArcGIS for Desktop Cookbook

By: Daniela C Docan

Overview of this book

Table of Contents (18 chapters)
ArcGIS for Desktop Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating models


According to the online ESRI GIS Dictionary, a model is an abstraction of reality used to represent objects, processes, and events. In ArcGIS, a geoprocessing model is created with the Model Builder built-in application, as shown in the following screenshot:

A model contains a process or more connected processes that are automatically executed when the model is run. A process consists of three elements: an input dataset (blue element), a tool (orange element), and an output dataset (green element). A geoprocessing model helps us to use various analysis operations and to create new data in a continuous workflow. In this way, the geoprocessing workflow can be reused and shared with other users. In ModelBuilder, you can use three basic types of elements:

  • Variables (for example, input or derived data, buffer distance value, and SQL expression)

  • Tools (for example, system tools such as buffer and intersect)

  • Connectors (for example, data connector)

Another important aspect of a model...