Mercator – Parallel lines of latitude and longitude Conic – made by projecting points and lines from a globe. High degrees of accuracy and very little distortion. Gnomic – made by projecting points and lines from a globe onto a piece of paper that touches the globe at a single point. Topographic – detailed map showing hills and valleys
Speed of Light – 300,000 km/s Different wave lengths
Each wave has distinct wavelength.
September 29 – 9 degrees N or S and 29 degrees E or W.