GEO 121 1st Edition Lecture 7Outline of Last Lecture I. ProjectionsII. Robinson ProjectionIII. Survey SystemsOutline of Current Lecture IV. Review of Scales1. Types of Scales2. Common ScalesII. Aerial Photographs Current Lecture:Review of ScalesTypes of ScalesoRatio ex: 1:24,000oFraction ex: 1/24,000oBar ScaleoVerbal Scale ex: one inch equals twenty-four thousand inchesCommon Scaleso1:24,000Most common scalesValueless unless specified otherwiseo1:63,360Equals exactly one mileo1:63,200Equals approximately one mileAerial PhotographsCan be:oBlack and WhiteoColoroInfraredoColor infraredThe current favorite amongst geographersShows reflected radiationAre affected
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