Topic: GIS Foundations — Data Quality, Field Types, Classification & Attribute Tables

Essential Question:

How does the structure and quality of attribute data determine what kinds of maps and visualizations we can build?

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STUDENT NOTES (COPY ALL OF THIS)

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1. Attribute Data — The Foundation of GIS

Every layer in GIS is made of:

Geometry

• Points
• Lines
• Polygons

Attributes

Information stored in the attribute table for each feature.

For example:

A school point might contain:

• Name
• Address
• Enrollment