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2010 GIS Summer Workshop Skills

Table of Contents
Copy Data Files to the Desktop
Create a Personal Geodatabase
Add a Base Map to Your Map Document
Table of Contents: Display and Source Tabs
Joining Tables
Using Selections to Analyze Data
Create an Attribute Selection Using a Formula
Save your Selection as a new Layer
Create a Selection Based on Location
Change the Symbology
Design a Map Layout

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Joining Tables

Any time you want to add external data (.dbf or .csv file) to a map file, you need to join the data from the external file to the data table contained in the map. To Join one or more tables, there has to be a common field among them. In many cases, a geographic identifier – like a Census designation for a Block or region – is the common field. Common fields can be any element – so long as they match the data from one file to another correctly.

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