Hobo-Dyer Projection Activities...........
Take 2 placemats. Place both side by side with one
north-up and the other south-up. Can you believe they are the exact same map?
They are, but your mind has trouble believing that fact. READY for ANOTHER
point-of-view? Take the north-up side of your placemat. Slice it with a
scissors or sharp utility knife (be careful) north to south through the
middle of Africa. Then reposition the pieces so that West Africa is on the
right side and East Africa is on the left side. (This is a unique property of
all cylindrical maps…you can "slice" the map at any longitude line and center
the cylinder anywhere you wish). This revised map with a split Africa, is
what oceanographers use when they want to study ocean currents and
temperatures. Now that's an image that really illustrates how earth is a