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2013 Kentucky GIS Pre-Conference Workshop

GPS Technology: Survey vs. Mapping Mr. Jeff Clark, PLS -- Precision Products Geospatial Division Mr. Eric Muncy – Precision Products Geospatial Division. 2013 Kentucky GIS Pre-Conference Workshop. Sputnik Launched in 1957 First man made satellite Transmitted radio signals

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2013 Kentucky GIS Pre-Conference Workshop

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  1. GPS Technology: Survey vs. MappingMr. Jeff Clark, PLS -- Precision Products Geospatial DivisionMr. Eric Muncy – Precision Products Geospatial Division 2013 Kentucky GIS Pre-Conference Workshop

  2. Sputnik Launched in 1957 First man made satellite Transmitted radio signals Lived for about 3 months

  3. US Military First used in the 1960s To track nuclear power vehicles - ships

  4. Korean Flight 007 • Shot down September 1983 • Accidently was in Russian Air Space • Presidential Order was signed to make GPS available for civilian use

  5. Selective Availability (SA) • 1989 – Intentional dithering of the satellite clocks by the DOD called SA was instituted in 1989. • 2000 – President Clinton ordered SA to switched off on May 2, 2000. • Had little to no effect on surveying applications of GPS • Greatly improved consumer grade GPS

  6. BASE STATION

  7. Different Grades of GPS?

  8. Consumer Grade Inexpensive 15 to 30 feet accuracy Good for general locations Navigation Street Signs Trees Buildings (911) Consumer or Recreational grade…

  9. Mapping Grade… • Mapping/GIS Grade • 1 inch to 10 feet accuracy • Digital Clipboard • Good for more accurate locations • Hydrants • Manholes • Roads

  10. Survey Grade • Centimeters accurate • Most robust • Good for the accurate locations related to: • Control networks • Land boundaries • Topographic & Engineering Surveys

  11. What is the freaking difference?? Survey vs. Mapping

  12. Mapping - Software • Collection of Attributes/Photos • Taking GIS data out with you

  13. Survey - Software • Stakeout operations • Volumetric calculations • Coordinate Geometry • Metadata - Datums, NAD 83, Geoids

  14. KYTC VRS - Basics • VRS – Virtual Reference Station • Free Service (Anyone to use) • Can be used in real time (Cell phone / Cell modem) or back in the office to process GPS data • Continuing to be improved (location and accuracy) • http://kycors.ky.gov/

  15. KYTC VRS – Basics THEN

  16. KYTC VRS – Basics NOW

  17. Questions? • Contact Info: Mr. Jeff Clark, PLS Cell: 270-559-9097 Email: jeff_clark@yourprecision.com Mr. Eric Muncy Cell: 859-321-3675 Email: eric_muncy@yourprecision.com

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