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Why Use Maps???. Broughal Middle School shown here. Closer Look at Bethlehem, PA Area Map. Latitude and Longitude. 1. What is latitude? 2. What is longitude?. Latitude are lines that run parallel to the equator. Longitude are lines that run perpendicular to the equator.

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## Why Use Maps???

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**Broughal Middle School**shown here Closer Look at Bethlehem, PA Area Map**Latitude and Longitude**1. What is latitude? 2. What is longitude? Latitude are lines that run parallel to the equator. Longitude are lines that run perpendicular to the equator.**.**Location How can we find the location of any place on the map? By using the coordinates - latitude and longitude**Location**What are the coordinates for Broughal Middle School?**Location**How can we get the coordinates for any location? What technology can we use? A GPS**GPS**Global Positioning System (GPS) is currently the only fully functional Global Navigation Satellite System (GNSS). Transmit signals that indicate positioning. Used for navigation, map-making, and land surveying. Also provides time reference**Global Positioning System (GPS)**A constellation of 27 Earth-orbiting satellites (24 in operation and three extras in case one fails). Developed and implemented this satellite network by U.S. Military NAVSTAR GPS satellite**In order for a GPS device to find a location, there needs to**be three satellites to pin-point the spot. The combination of the three satellites working together is called triangulation.**Global Positioning System (GPS)**• Circles the globe at about 12,000 miles (19,300 km) • 2 complete rotations every day • At least four satellites "visible" in the sky. Find location through a mathematical principle called trilateration.

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