The Districting for ArcGIS add-on simplifies the redrawing
of political boundaries local, state, and federal government agencies
undertake to account for population changes. The add-on transforms what
was once a long, manual process into a convenient process for defining
police beats; sales territories; voting, school, and fire districts; and
many other boundaries.
Once you have the base data established, such as counties
or ZIP Codes, you can group the units simply by selecting them in ArcMap.
Districting for ArcGIS can help you analyze population densities, housing
breakdowns, income and race statistics, and other data.
Districting for ArcGIS also makes it easy to quickly
draw various alternative boundaries for consideration.
The Districting for ArcGIS add-on is built on top of
ESRI's Arcview, Arc Editor, and ArcInfo desktop technology and uses both the ArcCatalog and ArcMap applications within. ArcCatalog
is a convenient way to organize and preview districting plans. ArcMap
contains an easy-to-use interface for viewing and editing districting
plans. To use the Districting for ArcGIS add-on, you need an ArcInfo, ArcEditor, or ArcView license. Districting for ArcGIS supports data in personal
geodatabase, shapefile, and coverage formats.
The Districting for ArcGIS add-on includes an online help file, providing help on specific topics, as well as a comprehensive tutorial to guide new users through the entire districting process. To access the help section and the tutorial, you must first install the Districting for ArcGIS software. The help file and the tutorial will then be available through the ArcGIS Desktop help tab.
Technical support is not available for free add-ons. However, you may send inquiries to districting@esri.com or visit the Districting for ArcGIS Discussion Forum to benefit from the experience and expertise of fellow professionals in the GIS community.
Verify that your user login is an Administrator. When installing the Districting for ArcGIS add-on, the current login user needs to be an Administrator because the install program is adding information to the Windows registry.
You must turn on the Districting for ArcGIS add-on in ArcMap by going to Tools ->Extensions. Check the Districting box and click close. Toggle the Districting toolbar (either go through View ->Toolbars or right click in the toolbars region near the top of ArcMap.)
The Districting add-on requires that the values for the field be unique in both the source geography and source attribute datasets. Otherwise the field will not appear in the key field drop down list.
Also, the candidate for the join key field must be either an integer (including short, long, small integer) or string type. So the fields of type double will not be listed as a candidate.
Deleting the GxObjFactCache.dat file from C:\Documents and Settings\(user profile)\Application Data\ESRI\ArcCatalog fixes this problem. The file will automatically be recreated by ArcGIS the next time the application is used.
For an average machine (512 MB of RAM and 1 GH processor), up to 3,000 districts can be created for a plan. Additional hardware may be required to create a plan that has more than 3,000 districts to ensure better performance.
For an average machine (512 MB of RAM and 1 GH processor), up to 5,000 source geography units can be used to create a plan. Additional hardware may be required to create a plan that has more than 5,000 source geography units to ensure better performance.
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