INDOT Height Modernization Project Ryan C. Swingley, PLS Andrew D. Baxter, PLS

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships What is Ht. Mod.? A National Oceanic and Atmospheric Administration Program Uses GPS and other new technologies to improve elevation accuracy Program Objectives  Improve Transportation by reducing design and construction costs  Accurate determination of floodplains  Study runoff amounts and effects  Improve agricultural yields  Manage coastal resources

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Why is Ht. Mod. Needed? National Spatial Reference System (NSRS) monuments set between 1874 to 1979 Only 2514 monuments have been reported as recovered since 2000 These monuments are the foundation for all Geospatial Infrastructure, GIS, construction and development

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Why is Ht. Mod. Needed? National Geographic Vertical Datum of 1929 North American Vertical Datum of1988 INDOT – mixed datums, sometimes unknown These different datums cause potential harm to the public Ht. Mod will create a densified and unified datum for the scientific, geospatial, construction and agricultural communities NGS will implement a new vertical datum in 2021

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Why is Ht. Mod. Needed? Regions of Changing Height

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Why is Ht. Mod. Needed? New NGS datum will based solely on airborne gravitation measurements Ht. Mod. will facilitate the current datum to be updated for 2021  Bring previous work (survey, construction, GIS) to be more accurately updated to 2021 datum

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Indiana Ht. Mod. History IGIC/ISPLS joint committee since 2006 Held a Ht. Mod. Forum in 2008 Implementation of the InCORS in 2009 Submitted an Indiana Ht. Mod. Plan to NOAA/NGS in 2009 Joined the Great Lakes Region Ht. Mod. Consortium in 2010 INDOT Benchmark Inventory (2010) Hamilton County Ht. Mod. Pilot Project in 2011 SPR Funds requested and granted in 2012

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships InCORS 45 GNSS CORS CORS eliminated 2 days of GPS obs.

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships InCORS Registered Users:  Survey = 664  Construction= 121  GIS= 81  AG= 607  RTN Usage:  2012 average per day = 134  2013 seeing increase of 26 more users per day  676 different companies using network

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships State-wide Ht. Mod. Project Phase I - Planning Phase  Recover existing 1 st and 2 nd order Benchmarks  20 km spacing  GPS and bluebook using NGS TM 58 and 59

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships State-wide Ht. Mod. Project Current Geoid 12a Consists of 137 BM Current number of BM created several gaps in 20 KM spacing

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships State-wide Ht. Mod. Project

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships State-wide Ht. Mod. Project Phase I DistrictNew Stations# of Tie Points LaPorte1560 Fort Wayne1040 Crawfordsville1040 Greenfield1040 Vincennes25100 Seymour2080 SUB-TOTAL90360

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships What is next? Request more SPR Funds for Expansion New INDOT standards for leveling benchmark Expansion of network to more localized areas and project specific control More Accurate elevations on existing CORS 2 cm Geoid Head start on 2021 vertical datum change

Coordination of Indiana GIS through dissemination of data and data products, education and outreach, adoption of standards, and building partnerships Questions? Ryan C. Swingley, PLS  Seiler Instruments  Dee Baxter, PLS  INDOT 