Tag Archives: gis

Working with the Conjugate Plate in GPlates

As promised last week, we are now going to demonstrate the usefulness of the conjugate plate in gplates. I’m going to start with just the two lines preparing plate 100. To that I will add another pair of lines defining … Continue reading

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Tutorial for Forcing Icosahedral Maps onto Flat Maps

So. A really… really… long time ago, I posted a method for mapping an icosahedral map of the sort that RPGs like Traveller are so enamored of, to a sphere in a 3d app. Similar projections were used by many science … Continue reading

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Working with the Rotations File in GPlates

I’m going to start out with a quick introduction to the rotation file. First thing, let’s go over the basic data line in the rotation file. This describes a point in time and space. 100 0.0 0.0 0.0 0.0 000 … Continue reading

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Plate Tectonics with GPlates and QGIS

Last time, in Building a World with a Globe and Paper, I described a simple hands-on model/game for simulating some of the effects of continental drift. Now we’re going to play the same game using gplates and qgis on the computer. … Continue reading

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Smoking GRASS

Today on the Astrographer, we’re going to look at a workflow using only free tools that are available for the Apple Macintosh platform. Almost all of these tools are available for any unix-based platform and most are available for windows … Continue reading

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