Fall 1999 Quiz 1
(5) These equations describe the Mercator projection for a sphere.
1. Why do we need 4 equations?
2. Can we show the poles on a Mercator projection? Support your answer using the equations.
· x = R (l - lo)
· y = R ln(tan(p/4 + F/2)
· F = p/2 - 2 arctan(e-y/R)
· l = x/R + lo
(5) This figure shows the variations in the Tissot indicatrix for a projection. Could this be a Mercator Projection? Defend your answer, explaining what the Tissot indicatrix shows.
(5) Define 5 of these terms:
· Portolan chart:
(3) Contrast three advantages/disadvantages between raster and vector data:
(2) List two important historical advances in our ability to portray the earth of a piece of paper.