Below is a (by now severely outdated) compilation of geoscientific datasets that can be found on the web, they represent a subset of the datasets that are supported by iGMT. In addition to giving the links to outside sources we also provide original grd files that were generated from plate motion Euler poles and spherical harmonic coefficients of potential fields.
We compiled all the raster datasets that can be plotted by iGMT at this point into a 300MB big gzipped tar file. If you want it all, please click here. Remember that we are providing this collection only for your convenience, and that all copyrights remain with the original authors, and the obligation to properly cite lies with you. If you decide this package, put the tar file to some shared directory, say /wrk/data/, it will expand into subdirectories that hold most of the data that is listed below.
The following datasets are a small subset of geoscience data that is available on the web. (There are numerous webpages containing meta-data and link collections such as UNAVCO's Voyager site or Seismo surfing the internet.) Here, we only list some of the datasets that are directly supported by our mapping interface iGMT. Also note that some of the grid files such as geopotential and plate velocity datasets contain original, processed data based on Euler poles, spherical harmonic coefficients and the like. If appropriate, the copyright remains with the iGMT authors.
You might also want to check out a comparison of all the colormaps that come with GMT, as PDF files in their in their original spacing, or normalized to 0...1. The iGMT produced script used to make these maps can be found in the data directory at USC Geodynamics.
Units for all geoid undulation files are meters. All GIF images show geoid contours in 10m intervals and have NUVEL-1 plate boundaries in red as well as continental outlines in white as an overlay.
We provide grd files with expanded plate velocities which are based on the NUVEL1 plate geometry model (DeMets et al., 1990) and various Euler poles as listed below. All files have 1 degree resolution, units are cm/yr, and the file size is 260kB each. For the Euler poles that went into this expansion, see, for example, the DGFI's listing of plate motion models, or the plate motion calculator by Tamaki.