This site is designed to give an interactive and visual representation of the data gathered and interpreted at the University of Wisconsin-Madison Geoscience department.

The initial tab contains a clickable map of the United States that allows users to easily choose the state that they wish to see GPS data for.

If this map is inoperable for any reason, a list of hypertext links of each state has been provided that has the same functionality of the interactive map, bringing the user to the corresponding state's individual page.

Below each state's map is a table containing hypertext links to the timeseries position plots of each GPS station.

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Here is the generated map of Wisconsin:

We see that there is a higher concentration of GPS receivers along the eastern side of Wisconsin, and these are trending south-southwest at an approximate rate of ~2mm/year. When this data is compiled visually, it is easier to understand how plate tectonics are working on a large scale, even in geologically quieter regions.

Here is the timeseries for a GPS station in Wisconsin (DERE)

This image shows the position of the GPS site on a day to day basis, where the red dots are the daily positions with random noise filtered out, and blue circles are 20-day average locations to show a more uniform trend. There are linear fit lines placed on each graph which are a calculation of the general trend over the entire data collecting period.

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GPS receivers and data are monitored at the University of Wisconsin-Madison Geoscience department by Professor Charles DeMets.

The software used for generating the maps is the Generic Mapping Tool, which is released under the GNU General Public License

Website design and interpretation by Kyle Fredericks, University of Wisconsin-Madison

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