1. The Attribute Table!
Without the attribute table, a polygon is just a polygon, a point is a point
The attribute table defines what points, lines, or polygons (features) are and describes their characteristics.
Is it a city or a tree?
Let’s talk about the attribute table. By now you guys are all familiar with the attribute table,
you’ve used to query your data by a specific values, and also the symbolize you data by a particular column.
It is a very important part of your GIS data file. It is what defines that your points, lines and polygons are and also
Describes it’s the characteristics. You can store quite a largeamount of informaiton in
The att able in columns – and in ArcGIS you can also manipulate the data in your att you can also bring in additional
Information and assoicate it to your spatial data (whether it’s a shapefile or a geodatabase.

2. The Attribute Table!

3. The Attribute Table!
You can add/associate data to your attribute table by:
creating a new field
joining (one-to-one)
relating (one-to-many records)
Example- shapefile of CA counties – we want to cacluate the total area for reach county
Area

4. The Attribute Table!
You can add/associate data to your attribute table by:
creating a new field
joining (one-to-one)
relating (one-to-many records)
Schools

5. Relational Database Model
Most Common!
Types of relationships
Cardinality - one-to-one, one-to-many, many-to-many
Examples…?
state capitol to state
state to cities
cities to state
Keys fields are used to create relationships between tables.
Can be a number or a text field.
Always create a relationship from the spatial table (shapefile, geodatabse) to the non-spatial table
The type of relationship records in one table participate in with records in another table is called cardinality

6. Joins and Relates
Two ways of linking an external table to a shapefile or geodatabase
One-to-One relationship
is created using the JOIN operation
external table is appended to your shapefile/geodatabase attribute table
ArcGIS allows us to link an external table to a shapefile or geodatadatabase
Two ways
One-to-Many relationship
is created using the RELATE operation
external table is physically separate from
the attribute table

7. Joins A join appends the fields from the
non-spatial table to the spatial table.
You can symbolize and query table information
that is contained in the non-spatial table
Spatial Layer shapefile, geodatabase
Non-Spatial Layer table (dbf, csv, txt)
Ave00

8. Spatial Layer shapefile, geodatabase Non-Spatial Layer table
Joins
NAME
Spatial Layer shapefile, geodatabase
Non-Spatial Layer table

9. Relates A relate does not append the fields from the Cannot symbolize
non-spatial to spatial table (tables separate)
Cannot symbolize
Cannot use “select by attribute” across tables
Spatial Table
Non - Spatial Table

10. Spatial Layer shapefile, geodatabase Non-Spatial Layer table
Relates
Spatial Layer shapefile, geodatabase
Non-Spatial Layer table

11. Joining and Relating Tables
1 to Join
1 to Many Relate
Many to Join
Many to Many Relate
Allows link from the spatial table to the external table!
(right-click on the shapefile/geodatabes to begin the join or relate)

12. Manipulation of Fields and Attribute Data – Adding and Deleting Fields
Add Fields from the Options button in the attribute table
Delete Fields by right-clicking on the field

13. Manipulation of Fields and Attribute Data – Adding Fields
Add Fields from the Options button
in the attribute table

14. Manipulation of Fields and Attribute Data – Field Calculator
Saves time in data entry - automatically calculate values for a field
copying
concatenating
creating new values using mathematical operations (add field 1 to field 2)
-Advanced Field Calculator
performs advanced calculations using Visual Basic for Applications (VBA) statements
Right-click on field heading
Field Calculator

15. Manipulation of Fields and Attribute Data - Summarize
Summarizing allows you to
aggregate your records by a field
sum
average
count
minimum
maximum value
standard deviation
variance
ArcMap creates a new table
containing the summarized data
Useful for joining tables

16. Manipulation of Fields and Attribute Data - Summarize
Right-click field
Summarized Dialog
Create a new table