[GPlates-discuss] Issues with visualization

[John Cannon]

Hi Brandon,

The colouring is only at the crustal thickness points, so between the points there is no filling-in or interpolating. You’re probably finding that the points start to spread apart due to crustal extension, and hence become less densely spaced. One option is to specify a higher density when generating the initial crustal thickness points.

This tutorial by Christian Heine talks about colouring by property. His specific case involves colouring by absolute age, but you can substitute any Shapefile attribute.
  https://protect-au.mimecast.com/s/heXMCL7rK8trgYn9hBghxj?domain=wiki.paleoearthlabs.org
  https://mailman.sydney.edu.au/pipermail/gplates-discuss/2017-January/000584.html

Regards,
John

PS:  Regarding the filling-in of crustal thickness points… Some much more advanced options could revolve around using pyGPlates to generate the initial points (the same points generated by the “Feature > Generate Crustal Thickness Points” dialog, but have those points spaced “non”-uniformly such that they become more uniform “after” extension – then you could load the resultant GPML into GPlates to do the actual thinning. But it would be tricky to know where to place those initial points (because it depends on how the crust extends in your particular region). I suppose one could digitize some rough polygons in the extensional regions (and give them a name, or some other property, according to how much they thin, roughly), then use those polygons to generate sample points more densely in the more highly stretching polygons – perhaps have some very high initial density of uniform points but don’t add all those points (just add more of them in more highly stretching regions). Alternatively, use GPlates to export the final thinned points back out to GPML or XY, and somehow use the final thinning factors as stretching feedback to generate a new set of points (and run those back through GPlates again to get the better filled-in results). It’s all pretty advanced though. Just some thoughts.



From: GPlates-discuss <gplates-discuss-bounces at mailman.sydney.edu.au> On Behalf Of Brandon Lutz
Sent: Saturday, 24 August 2019 5:12 AM
To: gplates-discuss at mailman.sydney.edu.au
Subject: [GPlates-discuss] Issues with visualization

Greetings,

I have two main visualization issues with which I need assistance if possible:

1) I have a topological network defined and crustal thickness points added to visualize thinning factors during intra-plate extension. The crustal thickness points are colored appropriately, but the reconstructed scalar coverage is not filling with interpolated crustal thinning factor. Is there some trick to make the area defined by the scalar coverage be filled with the colors that indicate crustal thinning factor (e.g.)?

2) I have polygons within reconstructed plates that I would like to color by property, but I can't seem to make this function work. I would like to make my own colors for the polygon features as well. Is there a way to do this in the GPLATES user interface or by creating a .cpt file? Is there documentation on how to do this?

Thanks so much for your assistance. GPLATES is such a powerful tool, but I am in need of some assistance to put the finishing touches on my model and make animations for presentations.

Best regards,

Brandon


--
Brandon Lutz

PhD candidate, Geology

New Mexico Institute of Mining and Technology

Lutz.brandon1 at gmail.com<mailto:Lutz.brandon1 at gmail.com>

513.473.6794<tel:(513)%20473-6794>
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