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Subject: Geodesy


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HMK 1_Plate Boundaries: Present, future, & past
Brian Hampton, Michigan State University; , Michigan State University
This project builds on in-class exercises and lectures by having students learn to identify modern, future, and past plate boundaries. Students will use trends in topography, distribution of earth quake and ...

GRACE: Tracking water from space

This 7-minute video gives an overview of the GRACE (Gravity Recovery and Climate Experiment) satellites and explains the technique of using gravity to measure mass movement such changing as ice and ...

What is Geodesy?

Overview of what traditional geodesy is, including descriptions of geoid, ellipsoid, datum, gravity, and GPS (global positioning system). Appropriate for high school or lower division college ...

CLICK: USGS Center for LIDAR Information Coordination and Knowledge

This is the the USGS clearing house for LiDAR data and information. The goal of Center for LIDAR Information Coordination and Knowledge (CLICK) is to facilitate data access, user coordination and ...

USGS Crustal Deformation Data

The US Geological Survey maintains a variety of fault and volcano monitoring sites around the western United States. Instruments at these sites include strainmeters, creepmeters, tiltmeters, ...

Surface Creep on California Faults

Roger Bilham
This site provides data from a number of creepmeters in California. A creepmeter is an instrument that monitors the slow surface displacement of an active fault. Its function is not to measure fault ...

Tunnel Tiltmeters

Roger Bilham
This website provides an overview of how tiltmeters function to help scientists detect subtle deformation of the Earths crust such as occurs from plate tectonic movements and volcanic deformation. ...

GPS data for educators

Looking for interesting data to use in your course? UNAVCO has worked with educators and scientists to identify GPS stations that illustrate various Earth science processes. The data are the same ...

Elevation correction and the geoid tutorial

The Earth is not a perfect sphere, but is instead more like a slightly squashed sphere called an ellipsoid. Because of this, GPS receivers must use a correction model (called a geoid) to calculate ...

The geoid and receiver measurements tutorial

This web page explains how differences in the gravity at different places on Earth requires GPS receivers use additional corrections to find the true elevation of places on Earth's surface. The ...

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