Antimeridian and pole selection workaround

[miktoki]

These are two related issues with selections:

Antimeridian: When selecting a region of interest over the antimeridian (eg. 170° E - 170° W), one will get its counterpart instead ( 170° W - 170° E). This means that it would be impossible to select a region like the pacific ocean or bering sea in one selection. While this is perhaps not the main region where a ROI selection would be interesting, it could be frustrating.

If not possible to include the antimeridian in the ROI, as a temporary workaround, would it be possible to have a subtle arc from the north to south pole appear along the antimeridian to indicate this (both in the 2d and 3d globe), when you are making a selection?

Poles: Similarily, and perhaps more importantly, it is highly nontrivial to select a region which encompasses a pole, which is central to magetism. When one selects a region, then moves the mouse outside the map, the bbox stops following the mouse until the mouse re-enters the map.

To make it easier to select latitudes near 90°N or 90°S, it would be nice if, when the mouse exits the 2d map, it is still possible to adjust the bbox horizontally, while the height of the box would go all the way to the edge of the map. simplifying including the pole in the selection. In the 3d map this cannot be done as the pole is one point on the map, but the arc proposed above between the poles would (by the fact that the arc ends there) indicate where the pole is.

To top this off , if the arc, and especially the poles would be sticky on selection, this would make things a lot simpler for the user

[pacesm]

see related ESA-VirES/VirES-Server#13

[pacesm]

IMO, this is still relevant and should be addressed.