My question is related to this:
I have a relational database with 'world tiles'. Each tile has a side length of 0.25 degrees (plus top left and lower right lat/long coordinates). This means I have 1036800 tiles (720 for latitudes and 1440 for longitudes). I would like to understand distortion a bit better (sorry about this stupid question). How do you compute the size of each tile? I understand that the distortion is largest at the poles and that the tiles are not necessarily square. Any links/feedback would be very much appreciated. Many thanks!