func CenterBoundsZoom(proj crs.ProjectTransformer, bounds geo.LatLngBounds, size geometry.Point, maxZoom float64) (geo.LatLng, float64) {
// calculate our zoom
zoom := BoundsZoom(proj, bounds, size, maxZoom)
// convert to points
swPoint := crs.LatLngToPoint(proj, bounds.SouthWest(), zoom)
nePoint := crs.LatLngToPoint(proj, bounds.NorthEast(), zoom)
// find center
center := crs.PointToLatLng(proj, swPoint.Add(nePoint).DivideBy(2), zoom)
return center, zoom
}
