Elevation & Geodetic Control Workgroup Activities


Activities are updated after IGIC board meetings, roughly once per quarter. If you'd like more information about a specific project or initiative in the interim, feel free to contact one of the workgroup leaders/co-chairs or the IGIC Offices.




August 21, 2008


The joint committees of ISPLS (GPS-GIS Monumentation) and IGIC (Elevation-Geodetic Control) met on July 15th to put the finishing touches on the Indiana Height Modernization Plan. The plan will be used to solicit support around the state for improved heights from GPS. These improvements will benefit citizens, governmental entities, and corporations across the state in the form of economic development, decreased cost of surveying and mapping, increased accuracy from surveying and mapping, precision farming, environmental monitoring, and construction to name a few. The Committee will discuss the draft with the IGIC Executive Director at the August committee meeting, scheduled for the 19th at Woolpert's Waldemar Drive office. A draft of the report, for those interested, can be found at https://projects.woolpert.com/ISPLS/. User name is: ISPLS_2007, password: HARN.


June 19, 2008


The joint meeting of the ISPLS GPS-GIS committee and the IGIC Elevation-Geodetic workgroups met on Tuesday, May 20, 2008. The group reviewed the material compiled so far that will be used to prepare the Indiana Height Modernization Report. That material is to be pulled together, in a rough form, for discussion at the next meeting scheduled for Tuesday, June 17, 2008.


April 17, 2008


The Elevation-Geodetic Control Workgroup and The Indiana Society of Professional Land Surveyors GPS-GIS Committee have met three times since the last IGIC Board Meeting (February 26th, March 18th, and April 15th). During those meetings the group welcomed new members, Kevin Johnson and Sean Suttles from Bernardin, Lochmueller & Associates and summarized work on Height Modernization. The following documents have been developed by the Committee:

  • A report outline to support height modernization
  • A list of potential supports have been developed
  • A draft of the first of two phases for the project
  • A document explaining how height modernization can be used to leverage the State's investment in the INDOT with Continuously Operating Reference Stations (CORS)

February 18, 2008


The Elevation-Geodetic Control Workgroup held the Indiana Height Modernization Forum October 25, 2007. As a result National Geodetic Survey (NGS) now recognizes Indiana's interest in Height Modernization. NGS has joined IGIC to form the joint ISPLS/IGIC Geodetic-Elevation Workgroup. The Indiana Department of Transportation (INDOT) is going to take the lead for the State for height modernization. The combined groups will be assisting INDOT with Continuously Operating Reference Stations (CORS), and have developed a web site at:

URL: https://projects.woolpert.com/ispls
User Name: ISPLS_2007
Password: HARN

The Workgroup is developing an Indiana Height Modernization Plan and will submit it to NGS for funding. The plan will be used to identify and build support for height modernization throughout the state.

It has been a very busy and productive year. All committee members offered to serve throughout 2008 to continue our work. We welcome all new members.


January 17, 2008


At the December 18th workgroup meeting, it was agreed that after a very busy year, members would all take the holiday off and re-assemble in January just after the annual surveyors conference. At that point the workgroup will distribute assignments to plan the first two phases of the height modernization project. This includes planning leveling routes between existing bench marks, INDOT CORS stations, and any HARN points that are convenient. Once the plans are developed the workgroup will be able to assign some cost estimates. The goal is to complete this effort by March. After that, other sections of the proposed plan will be assigned to workgroup members with a proposed completion date of June 30, 2008. Once the plan is complete, it will be used as a basis to submit to the National Geodetic Survey for Height Modernization funding.


November 15, 2007


The Elevation and Geodetic workgroup met along with the Indiana Society of Professional Land Surveyors October 25th as part of the Indiana Height Modernization Forum. This forum was used to kick-off height modernization in the State of Indiana. Representative from the National Geodetic Survey, the Indiana Departments of Transportation (INDOT), Natural Resources (DNR) and Environmental Management (IDEM), US Geological Survey, county surveyors, professional land surveyors, the Indiana Land Office, the Indiana Department of Agriculture, the Indiana Geographic Information Council, and interested members of the public attended this all-day event. Height modernization is a program to improvement height estimates and is administered by the National Geodetic Survey. INDOT stepped up and offered to be the state representative for this important project.


September 20, 2007


This workgroup meets and works with the GPS-GIS Monumentation Committee of ISPLS. Chair Tom Mahon has set up a project website for committee members to exchange information, documents, and keep abreast of current activities, including assisting INDOT with the CORS Height Modernization project.