
Geographic information systems (GIS) applications bring another aspect to
traditional databases... geography. Since the majority of environmental data is
spatially correlated, GIS is a vital tool for environmental site
characterization. The explosion of PC-based systems has made GIS widely
accessible and affordable. Tetra Tech utilizes the power of GIS to both analyze
environmental site data and to establish such systems for our clients.
EMAGIS is designed to help manage and graphically visualize environmental
site data. EMAGIS is a vector-based GIS program for the MapInfo
Professional desktop mapping program and Microsoft Windows. The EMAGIS
program provides several environmental site characterization tools that can be
used in conjunction with optional products including Surfer for Windows, AVS/Express,
EVS, GMS, Excel, and Vertical Mapper. These tools include:
- Surfer for Windows Contouring Module that displays spatial
distributions of data. EMAGIS can also generate multiple contours for
different sampling events and then create an AVI (Audio Video Interleaved)
video file
- A Geostatistics module that has tools for variogram modeling, kriging, and
cokriging in 2-D and 3-D. Create files that can be used with leading 3-D
visualization and groundwater modeling packages, including AVS/Express,
EVS, and GMS
- A Cross-section Generator Module that can show groundwater monitoring
wells and their screened intervals, groundwater elevations, soil and
groundwater quality, and stratigraphic information. A new wizard was
developed to make creation of profiles easier, and also allows for
recreation of sections after new wells or additional sampling has been
performed
- A Contaminant Correlations Module that includes pie charts, chemical
fingerprints, Stiff diagrams, and scatterplots
- A Risk Assessment Module that calculates and graphically displays human
health risks to air, soil, and groundwater
- A Statistical Trend Analysis Module that lets the user test for
statistically significant trends in contaminant levels or groundwater
elevation levels over time
- Descriptive Statistics and Outlier Analysis modules calculates standard
statistics of a given data set and flag statistical outliers in a database
- A Geochemical Checks module that flags water and soil samples
violating basic laws of chemistry or other rules-of-thumb applied in
geochemistry
- A Soil Concentration Profiles Module that simplifies soil quality data
plotting
- A PhotoView Module that can display site photos and descriptions
- Graphing ability for time-series plots via links to Microsoft Excel.
Automated routines for plotting of groundwater hydrographs from hundreds of
wells is included
- For systems equipped with sound cards, each module can provide verbal
instructions by using a text-to-speech technology created by First
Byte. Example sound wav file (60 KB)
The EMAGIS support page has a demo version for
download that also contains the User's Manual in Microsoft Word format.
You can see exactly how to use EMAGIS or to see
the methodology behind the modules browse the online
help. The setup program
for the demo version is password protected, so for that or for more information
contact EMAGIS support at (925) 283-3771 or email emagis.support@tetratech.com





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