GEO 121 1st Edition Lecture 6 Outline of Last LectureI. ProjectionsI. Robinson ProjectionII. Types of Survey SystemsOutline of Current LectureI. Review of Mapsa. Maps Needb. Lines of Longitude and LatitudeII. Topographic Mapsa. Special Parallels and Meridiansb. Contour LinesCurrent Lecture:Review of MapsMaps need:oScales to express distance (1:24,000 is a common, valueless ratio)oLegends to differentiate dataoNorth arrow (there can be 3 N-Arrows)oLines of latitude and longitudeoA titleoA dateLines of latitude and longitudeoMeasured in degrees, minutes, secondsoLines of latitude are called parallelsoLines of longitude are called meridiansoThe Prime Meridian is at 0 degreesoThe International Date Line is at 180 degrees E/WTopographic MapsSpecial Parallels and Meridianso90° North-Arctic Circleo90° South-Artic Circleo180° E/W International Date Lineo23° N-Tropic of Cancero23° S-Tropic of CapricornContour LinesoType of "iso" lineoConnects points of equal elevationoThe closer the lines, the more steep the
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