I'm currently working on displaying twitter geo data (currently just long/lat -> cartesian without any analysis).
x = ((long + 180)/360)*x_dim y = (y_dim/2) - ((arsinh(tan(lat))*(y_dim/2) (lat converted to radiant of course)
Now, the shape is apparent, but of course, the projections don't match. How can I fix that? (programming experience is plentiful, so it's more the theoretical side I'm concerned with).