Incorrectly rotated thumbnails in Southern regions #704
Description
Working with Antarctic data (in EPSG:3031) we have uncovered a visual issue when displaying data thumbnails in Explorer, where thumbnails are incorrectly rotated compared to their native extent.
Reviewing the code, @SpacemanPaul and @Ariana-B have determined that the issue is caused by assuming the image is already north-up when providing the image to leaflet. However, this is not the case of imagery in EPSG:3031, and this assumption even fails in Tasmania (although not as badly as Antarctica).
The suggested fix is to load the thumbnail and reproject to web-mercator prior to passing to leaflet to display.