Reconstructing multiple shapefile polygon features through time

Q&A
1

I’m trying to reconstruct multiple polygons through time using gplately. They are H3 grid hexagons (variable name “H3”) that I would like to use for time-transgressive prediction. I load them as a feature collection (originally a .shp), then I am hoping to get their reconstructed geometry as well as plot them using gplately.

And have tried reconstructing them through “model.reconstruct(H3, time)” or through the “gplot.get_feature(H3)”. For get.feature, I have done this as loop through each feature in the collection and it does not seem to help. I get a reconstructed feature geometry, but any plotting does not line up where it should, nor are the coordinates correct.

It seems like regardless, I do not get reconstructed geometry and am returned the original geometry. I can reconstruct other files (e.g., coastlines) with the same methods. All of the H3 features would be anchored on North America at time=0. I have tried setting the plate ID to 101.

Happy to answer any questions you might have. Thanks in advance for your help.
Danny

2

Hi Danny,

If you show me your code and data, I can try to find a solution.

3

If the reconstruction already returns the original geometries, you need to check if the correct plate IDs have been assigned to the features.

4

Thanks for this ^ , I had not been setting them quite right. This comment got me headed on the right path after turning in circles for a bit. I then figured out I had to partition the plates not just set plate ID to get the results I wanted. Thanks.