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Troop 721 Milford, CT - Orienteering
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 Orienteering
Maps / Lat-Long
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Maps & Map Reading A map is a two-dimensional representation of the three-dimensional world you'll be hiking in. All maps will have some basic features in common and map reading is all about learning to understand their particular "language." You'll end up using a variety of maps to plan and run your trip but perhaps the most useful map is a topographic map. A topographic map uses markings such as contour lines to simulate the three-dimensional topography of the land on a two-dimensional map. In the U.S. these maps are usually U.S. Geological Survey (USGS) maps. Other maps that you'll find helpful are be local trail maps which often have more accurate and up-to-date information on specific trails than USGS maps do. Here's a brief overview of the basic language of maps. Latitude and Longitude Maps are drawn based on latitude and longitude lines. Latitude lines run east and west and measure the distance in degrees north or south from the equator (0° latitude). Longitude lines run north and south intersecting at the geographic poles. Longitude lines measure the distance in degrees east and west from the prime meridian that runs through Greenwich, England. The grid created by latitude and longitude lines allows us to calculate an exact point using these lines as X axis and Y axis coordinates. Both latitude and longitude are measured in degrees (°). 1° = 60 minutes 1 minute = 60 seconds Therefore: 7 ½ minutes = 1/8 of 60 minutes = 1/8 of a degree 15 minutes = ¼ of 60 minutes = ¼ of a degree
Boy Scouts, Troop 721, Milford CT, Eagle Scouts, boy scout, scouts, scouting, america, badge, merit, skills, BSA, leaders, camping, outdoors, advancement