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Where am I?

Where am I?. Using a GPS receiver to determine your location. Global Positioning System. Inexpensive handheld GPS receivers Signals transmitted by orbiting satellites User’s position is measured with great accuracy Position result is reported as a geographic coordinate.

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Where am I?

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  1. Where am I? Using a GPS receiver to determine your location.

  2. Global Positioning System • Inexpensive handheld GPS receivers • Signals transmitted by orbiting satellites • User’s position is measured with great accuracy • Position result is reported as a geographic coordinate

  3. Geographic Coordinates • A GPS receiver is not much use unless you understand the result. • Geographic Coordinates are a numeric representation of position on (or near) the earth’s surface. • There are many different systems of geographic coordinates.

  4. Geographic Coordinate Systems • Latitude / Longitude • Universal Transverse Mercator (UTM) • Others • State Plane • Military Grid Reference System • British Grid • Maidenhead • and many, many more.

  5. UTM Universal Transverse Mercator Coordinates UTM Exercise Locating Grids on USGS Maps

  6. This 1km square is located at706km E 4344km N • Usually we need to be a bit more precise about a location!

  7. Using UTM is Easy • Take a look at the “UTM Practice Map” handout. • Can you quickly determine what map feature is at: 706.6 km E 4345.3 km N

  8. 100m square example

  9. Using a distance scale, marked in meters, to measure UTM coordinates

  10. UTM Display on a GPS Receiver

  11. Reporting your position inUTM kilometers

  12. UTM Coordinate Markingson USGS Topographic Maps

  13. This is a Township & Range Section, NOT a UTM Grid

  14. Plotting and Reading UTMClassroom Exercise

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