in reply to Slice a hash to get a subset hash.

Neater? Eye of the beholder...but it is pretty self explanatory. 

my @location_fields = qw( Lat Long Elevation );;
my %loc; @loc{ @location_fields } = @london{ @location_fields };;

pp \%loc;;
{
  Elevation => 24,
  Lat => "51\xF830′26″N",
  Long => "0\xF87′39″W",
}

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