Learning Module: Issues with Spatial References

Purpose

This module introduces students to the primary problem with working with disparate spatial data sets, undefined and incorrectly defined spatial references, also known as coordinate systems.

Learning Outcomes

• Address problems with spatial references/coordinate references to prepare spatial data for analysis and mapping

Reading (optional)

• Bolstad, Chapter 3
• All except "Datum Transformations," "Vertical Datums," and "Dynamic Heights" only if you really want to!

Presentations/Discussions

• Definitions
• New: Graphical Definitions
• New: Details for Projected Coordinate Systems (PCS)
• GIS Nightmares
• Is the Coordinate System Defined?
• Define vs. Project
• Common Spatial Reference Systems
• Reprojecting
• Video: Problems with Spatial References (avi)
• Additional: GIS Process

Lab

• Problem Data

Notes to Instructors

This learning module should be followed closely by the module on "Selecting Spatial Reference Systems" and the division between the two labs is still being worked out.