ArcGIS Desktop

  • Documentation
  • Support

  • My Profile
  • Help
  • Sign Out
ArcGIS Desktop

ArcGIS Online

The mapping platform for your organization

ArcGIS Desktop

A complete professional GIS

ArcGIS Enterprise

GIS in your enterprise

ArcGIS for Developers

Tools to build location-aware apps

ArcGIS Solutions

Free template maps and apps for your industry

ArcGIS Marketplace

Get apps and data for your organization

  • Documentation
  • Support
Esri
  • Sign In
user
  • My Profile
  • Sign Out

ArcMap

  • Home
  • Get Started
  • Map
  • Analyze
  • Manage Data
  • Tools
  • Extensions

Creating individual zones with Region Group

Available with Spatial Analyst license.

A zone is composed of all cells in a raster with the same value. Regions are a contiguous set of cells of the same zone type. Zones can consist of several disconnected regions. When the regions need to be processed separately, each must be identified as a separate entity. The Region Group tool assigns a new value to each region in a raster. The values are assigned by the scanning process, which starts in the upper-left corner of the raster and moves left to right, top to bottom. As each new region is encountered, a unique value is assigned to it. The process continues until all regions have been assigned a value.

Input before Region Group
Several disconnected regions exist within zones before Region Group.
Output from Region Group
Each region (disconnected zone) is assigned a unique zone value after Region Group.

In the output raster's attribute table, the Value and Count items exist as usual, but a third item, Link, is also created. The Link field stores the original input zone values. With this connection back to the parent values of the input, additional analysis can be completed.

Related topics

  • An overview of the Generalization toolset
  • Region Group

ArcGIS Desktop

  • Home
  • Documentation
  • Support

ArcGIS Platform

  • ArcGIS Online
  • ArcGIS Desktop
  • ArcGIS Enterprise
  • ArcGIS for Developers
  • ArcGIS Solutions
  • ArcGIS Marketplace

About Esri

  • About Us
  • Careers
  • Esri Blog
  • User Conference
  • Developer Summit
Esri
Tell us what you think.
Copyright © 2019 Esri. | Privacy | Legal