Curated OER
Meet Geodesy-The Science Behind GPS
Students discover how a datum of reference points are used to to describe a location. In this Earth Science lesson, students will simulate how a GPS accurately determines the location of reference points within a datum.
![Noaa: Survey Mark Hunting [Pdf] Activity](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Noaa: Survey Mark Hunting [Pdf] Activity")
NOAA
Noaa: Survey Mark Hunting [Pdf]
Hunt for survey marks that can possibly be found in your community. These markers may be very old and have been used to pinpoint exact locations for planning and building around the country.
NASA
Nasa: Slr and Gps (And Plate Tectonics and Earthquakes) [Pdf]
This slideshow explains how satellites are used to measure the movement of tectonic plates.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: Survey Mark Hunting
In this activity, students find data on a location and description of survey marks in the area, and then they search for them through a variation of geocaching.