Reference frame
Auto-alignment of PaleoDEM raster (PALEOMAP) and GWS points using Africa as anchor:
Δlat 0.0° · Δlon 0.0°
The offset is computed per model and applied identically to the globe and the well points.
Coordinate system
WGS84EPSG:4326 · °lat/°lon
Well coordinate input: WGS84 (modern). Paleo-reconstruction: GPlates GWS returns paleo-WGS84 in the model's rotation frame. Map (Leaflet, EPSG:3857 on the fly from 4326) and 3D globe use the same base; Scotese rasters are equirectangular WGS84.
Sources: GPlates Web Service · PALEOMAP (Scotese 2016) · EarthByte. Globe textures — public paleomaps of the corresponding age; when a layer is missing, modern Earth is used.