TxDOT GPS Applications

By Andre Fuegner

Transcript

1. 2012 Texas GIS Forum TxDOT GPS Applications Andre Fuegner
2. TxDOT GPS Background §  1984 - GPS R & D §  1988 - Installed first TxDOT GPS Regional Reference Point (RRP) §  1990 - 1st Generation RRP Network of 5 stations §  1996 - Pioneered Centimeter Level Airborne GPS for Photogrammetry §  1996 - 10 TxDOT GPS/RRP stations recognized as NGS/CORS §  2003 - Initiated RTK Network §  2012 - 182 RRPs, 133 CORS, RTK coverage in Texas by area: 51.97% §  RTK coverage in Texas by population: 93.32%
3. TxDOT‘s IOD/GPS Group n  GNSS Network Systems Management and Design n  GNSS Hardware / Software Maintenance n  GNSS Training and support for TxDOT‘s GPS users (Static, RTK, and mapping) n  GNSS Research and Developement
4. 2012 RRP Facts n  182 Regional Reference Points (RRP), 133 recognized as NGS/CORS n  GPS and combined GPS/Glonass receivers n  NAD83 epoch 2002 coordinates &NAD83 epoch 2010 coordinates n  5 second data rate n  5° elevation mask n  DAT files collected 1 daily file, archived 1 month n  RINEX (Receiver Independent Exchange) files 24 one hour files daily, archived 1 month n  All 182 RRPs single baseline RTK capability n  175 RRPs in networked RTK solution (VRS)
5. Typical TxDOT RRP/CORS n  Built to NGS CORS guidelines n  Building mount – TXGZ n  Tower – TXKC n  GNSS receiver box
7. TxDOT RTN Map Sources n  TxDOT ftp n  http://www.txdot.gov/business/contractors_consultants/gps.htm n  Mobile App n  http://bit.ly/wJfp4n
8. TxDOT RTN Users n  TxDOT RTN is not public n  TxDOT RTN users: • TxDOT employees • TxDOT contractors • TxDOT consultants
9. TxDOT RTN applications n  Aerial Photography & Processing IMU Data n  As-Built Verification n  Borehole Location n  Boundary Work - Tie In Corners n  Bridge Inspection n  Check Consultant Control n  Check Contractor Construction Staking n  Construction n  Construction Layout n  Cross Section Project n  Culvert And Flowline Alignments n  Design Aerial Photography n  Design Survey n  Design Topo Survey n  Determine The Extent Of Encroachments Into The ROW n  DTM Topo n  GIS Collection n  Grade - To Check Contractors n  High Density Scanning Surveys n  Locating Bridge Corners n  Locative Surveys For ROW n  Machine Control n  Old ROW Monuments n  Project Inspection Construction n  Quality Control And Topography/Grade n  ROW Recovery n  Set Control n  Set New ROW n  Stakeout n  Stock Pile Volumes n  Survey Control Verification n  Topo Survey n  TRM Texas References Markers n  Tying Existing ROW n  Utility Location
10. TxDOT RRP Static Data Users n  TxDOT and TxDOT contractors n  Private surveying companies n  GPS mapping community n  NGS CORS program n  NOAA GPS Weather Modelling
11. TxDOT GPS Static Applications n  Statewide/District-Wide Control Densification n  Primary Project Control n  Control for Airborne GPS for Photogrammetry n  Control for LiDAR Data Gathering n  Photogrammetric Control Panels n  Boundary Corners n  ROW n  Local Control
12. TxDOT GPS Photogrammetry Applications n  Precision design level mapping for engineering projects n  County-wide and District-wide Flights n  Map accuracy verification
13. TxDOT GPS Mapping Applications n  Post processing n  Highway Inventory Project - Texas Reference Markers n  Texas County Road Inventory n  Pavement Management Information Systems n  HBA Project n  Bridge Data Collection
14. TxDOT GPS Application - Sign Inventory - n  Sign Inventory collected in the Corpus district. Information regarding signage is available and its future uses not only include the location but maintenance status n  http://bit.ly/KIq0KB
15. TxDOT GPS Application - Travel Division - n  TRV Division is using this map showcasing their flora as well as events that are taking place throughout the state. n  http://bit.ly/tU9JCu
16. TxDOT GPS Application - Recommend Speed Limit - n  Data contains GPS points on road curves, where ball bank data has been collected and a program has been utilized to add recommended Signage as well as a recommended speed limit for said curve. n  http://bit.ly/HIEmJn
17. TxDOT’s GPS Partnerships n  NGS CORS program n  NOAA GPS Weather Modelling n  Texas Spatial Reference Center n  LSU data sharing
18. Thank you! More Information: ftp://ftp.dot.state.tx.us/pub/txdot-info/isd/gps/ GNSS helpdesk Dial 512 302 2350 then press 3 and 6 TSD_GPS-Support@dot.state.tx.us