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Illinois Height Modernization Program (ILHMP)

Guided by the National Geodetic Survey, Height Modernization is the establishment of accurate, reliable heights using global positioning satellite (GPS) technology in conjunction with traditional leveling, gravity, and modern remote sensing technologies. Activities are designed to provide long-term benefits for the environment, help to prevent loss of life, improve property estimates, and save money.


ILHMP Project Level Lines for Illinois, Years 1 through 6.

Benchmarks, Datums, and Leveling Efforts

2,216 new benchmarks and 505 visited horizontal monuments totals 2,721 current benchmark records added to the National Spatial Reference System (NSRS) by August, 2014. Roughly 2405 miles of new leveling has been completed. Geodetic leveling to be completed in fall of 2014 will include completion of east-west lines in central Illinois.
 
Illinois Geodetic Control (Beta V3.0) new
NGS datasheets and CORS stations, USGS and USACE stream gauges, and ILHMP level lines. Hosted by ISGS; custom interface.
 
Illinois Geodetic Control (Beta V2.0)
NGS datasheets and CORS stations, USGS and USACE stream gauges, and ILHMP level lines. Hosted by ArcGIS.com; basic interface.

Illinois LiDAR Data

Access original data LAS or XYZI files for 19 Counties; request data on hard drive for over 51 counties.
 
Access derivative data DSM and DTM/DEM files for 71 Counties.

Milestones

Goals include installation of new surveying benchmarks, revision of known elevation for existing surveying benchmarks, and stewardship of high-resolution digital Light Detection and Ranging (LiDAR) elevation data.
LIDAR data existing (dark brown and blue) or in development (light green, deep blue) for Illinois.

Showcase of LiDAR Data Applications

Real-world uses for Illinois LiDAR data. To add your project, send information to: S. Beaverson.

Monuments, CORS, and RTK Networks


Steering Committee and Affiliated Agencies


Project participants include: Illinois State Geological Survey, Illinois Department of Transportation, Illinois Department of Natural Resources, Office of Water Resources, Illinois State Water Survey, and also National Geodetic Survey, Natural Resources Conservation Service, and the United States Geological Survey .

Funding


The ISGS received $300,000 for Year 1 activities through the NGS Height Modernization Program with assistance from Congressman Timothy Johnson.


The ISGS received $725,000 for Year 2 activities through the NGS Height Modernization Program, championed by Congressman Timothy Johnson and Raymond LaHood/ Congressman Aaron Schock.


The ISGS received $800,000 for Year 3 activities through the NGS Height Modernization Program, championed by Congressman Timothy Johnson, Congressman Aaron Schock and Senator Dick Durbin.


The ISGS received $3,500,000 for Year 4 project activities through the Federal Highway Administration (FHWA) State Planning and Research (SPR) program and the Illinois Department of Transportation in conjunction with the NGS Height Modernization Program.


The ISGS received $3,500,000 for Year 5 project activities through the Federal Highway Administration (FHWA) State Planning and Research (SPR) program and the Illinois Department of Transportation in conjunction with the NGS Height Modernization Program.


The ISGS received $3,500,000 for Year 6 project activities through the Federal Highway Administration (FHWA) State Planning and Research (SPR) program and the Illinois Department of Transportation in conjunction with the NGS Height Modernization Program. Also, monies totaling $885,000 to support new airborne LiDAR data acquisitions were provided by the Illinois Department of Natural Resources, Office of Water Resources, Kankakee County, Illinois, and Will County, Illinois.