Link to live url:http://groups.google.com/group/srsw/web/srswhome
Link to persistent url for all of Solstice:
Roger Rayle really likes Google Earth. Before Google Earth came along, he spent tens of hours every few months creating two-dimensional depictions of new well sampling data for a local groundwater cleanup which he has been monitoring as a citizen volunteer for over fourteen years.
Now with the basic version of Google Earth, in a couple of hours, he can generate a quarterly updated, four-dimensional plot showing the location of over 16,000 pollution samples taken since 1986. A bar whose height represents the concentration of the contaminant is shown at the exact X-Y longitude/latitude for each sample location with the fourth dimension being date sampled. The result viewed on Google Earth gives a clear indication of which ways the contamination plumes are moving, how fast, and at what concentrations.Roger developed his technique to plot large datasets to Google earth beginning in April 2007. Working from an initial KML sample file provided by Dr. Sandra Arlinghaus, he first constructed a template with the desired colors, line weights, and icons for the categories of data to be plotted. Then he used a simple mail/merge process to generate the placemark KML code from the placemarks section of the sample template. Finally, he copied and pasted the result into the original template, replacing the sample placemarks, and opening the result in Google Earth. He happened to use Word and Excel for the mail/merge and Notepad++ for editing the KML template and final code, but other such programs should work just as well.
Besides showing the data points as bar graphs, Roger has tweaked his templates to show the sample name and date when one mouses over each placemark and to show a pop-up box of associated well data when one clicks on a sample placemark.
The sample data is just one level in a comprehensive mashup that also includes
This periodically updated mashup is used as a presentation tool for public meetings and as a decision support tool at technical meetings where the state, local government, and citizen representatives review cleanup proposals and make recommendations.
Roger helps others use Google Earth as a platform to display large datasets in 4-D. He considers it an outstanding free tool to allow community stakeholders to present multifaceted views of reality in a concise, unified format that can effectively influence decision makers.
An Electronic Journal of Geography and Mathematics,
Volume XIX, Number 1
Institute of Mathematical Geography (IMaGe).
All rights reserved worldwide, by IMaGe and by the authors.
Please contact an appropriate party concerning citation of this article: email@example.com