pangeaD3

Pangea animation using d3.geo.orthographic projection.

Demo: http://www.web-maps.com/pangea/

Tectonic Plate motion simulation

Data is from http://www.gplates.org/ under creative commons license http://www.gps.caltech.edu/~gurnis/GPlates/License_Caltech_Global_201129.html

1. Time series data was exported as .shp from GPlates 1.2.0.

2. Converted to GeoJson using ogr2ogr.

3. GeoJson files were compacted into TopoJson format using the topojson node.js tool.

Example:

From .shp to GeoJson
	ogr2ogr -f GeoJSON step_000.0.json  reconstructed_0.00Ma.shp

From GeoJson to TopoJson using -simplification of 25 
	topojson -s 25 --force-clockwise true -o topostep_000.json    step_000.json

This provides very good compression: 2.89Mb GeoJson to 340KB TopoJson