Coordinate Reference Systems

• Why do my files look misaligned after switching CRS?

• What is a Coordinate Reference System?

• Horizontal and Vertical Datums

• What Are Ellipsoid, Geoid, and Orthometric Heights?

• How to Verify or Update a Coordinate Reference System On Your Site

• Setting Up a Local Grid with Trimble and Propeller

• How to Generate a Trimble JXL file for Your Local Grid Calibration

• Propeller Correction Network (Australia)—Continuing Support for GDA94