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INTRO
Introducing the GEON IDV
INSTALL Download & Run the GEON IDV
LEARN
Tutorial
YOUR DATA Data Formats for the IDV |
Reference Earth Model (REM) Seismic Tomography data files
The GEON IDV is a powerful tool to display, explore and compare 3D gridded output of seismic tomography. To learn more more this, see Using the GEON IDV to explore seismic tomography.
Here are data files for GEON IDV use, and sample IDV displays, of seismic mantle tomography data from the Reference Earth Model (REM) (http://mahi.ucsd.edu/Gabi/rem.html) and from REM shear models (http://mahi.ucsd.edu/Gabi/rem2.dir/shear-models.html). The data values are perturbations in seismic velocity as percentage deviation from some standard seismic velocity model such as AK135. This page has same example displays and access to the data files for the GEON IDV.
Acronyms show the data sources:
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There are 2 data grids from each institution: a grid file with a global 2 degree resolution, and one with a 4 degree resolution. The 2 degree data files have 8 depths, and the 4 degree data files have 18 depths. Each grid file was converted to a NetCDF file by UNAVCO, for use in the GEON IDV.
To connect your GEON IDV to the data (NetCDF file), use the "Data" column links. Clicking on the link shows a page with information about that data. To connect to the data on the UNAVCO geon server catalog, cut the URL shown but omit the ".dat" part, and enter the URL it in the Data->New Data Source->From a Catalog window in the IDV.
To see a full-sized view of the pictures just click on them. In the IDV there's a globe display (the Globe pictures) and a flat map display (the Map pictures).
These sample globe displays each have a false-color data surface ("horizontal cross section") at the bottom of the mantle, and an isosurface set to a value about 1 or 2 percent less than average velocity. These displays are nice but the IDV displays have interactive controls for rotation, zoom, color tables, and isosurface value which let you explore the data very effectively.
Bundle files need to be remade; these will not work
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