To visualize natural phenomena, one must first determine how to represent geographic space best. Data models are rules and constructs used to describe and represent aspects of the world on a computer. Two primary data models are available to complete this task: raster data models and vector data models.

Learning Outcomes

• Explain how raster data models are implemented in geographic information systems applications.
• Describe how vector data models are implemented in geographic information systems applications.
• Determine how satellite imagery, aerial photography, and unmanned aerial systems are implemented in geographic information systems applications.

GTCM Alignment

Chapter Sections

• 4.1 Introduction
• 4.2 Raster Data Models
• 4.3 Vector Data Models
• 4.4 Satellite Imagery, Aerial Photography, and Drones
• 4.5 References