Feature Request: Pinch to zoom
Pretty much the upstream copy of gnome-maps#321 (closed) and gnome-maps#146 (moved).
The map widget should properly react to smooth pinch action with gradual zoom in/out. Instead of sudden zoom changes, the map should provide fractional zoom level in react. If possible, the zoom level changes should match the pinch action in a way that the things touched by finger tips stays touched through out the pinch action (as if it is physically stretched by the fingers).